2023 Edexcel AS Level Psychology (8PS0) Practice Paper with Answers

One strength of Agency Theory is that it has strong supporting evidence from Milgram's (1963) baseline experiment. In this study, 65% of ordinary participants administered a maximum, potentially fatal shock of 450 volts to an innocent learner when instructed to do so by an experimenter in a lab coat. This supports the theory's claim that individuals shift from an autonomous state to an agentic state, acting as agents of an authority figure and obeying orders that cause them severe moral strain.

1 mark for identifying a valid strength of Agency Theory (e.g., supporting research evidence, real-world application to historical atrocities). 1 mark for explaining/elaborating on the strength in relation to the theory's concepts (such as the agentic shift or moral strain). Note: Do not credit generic evaluation of Milgram's methodology unless it is directly linked to how it supports or validates the theory itself.

Social Identity Theory explains this behavior through three main stages. First, social categorization occurs, where the campers are divided into distinct groups: the Wolves (the in-group) and the Bears (the out-group). Second, social identification takes place, where the campers internalize the identity of their cabin, adopting its norms and taking pride in being a 'Wolf' to enhance their personal self-esteem. Third, social comparison occurs, where the Wolves compare their cabin favorably against the Bears. To achieve positive distinctiveness and further boost their collective self-esteem, they engage in out-group denigration, labeling the Bears negatively as 'lazy' and 'cheaters' while viewing themselves as superior.

1 mark for applying social categorization to the scenario (identifying the Wolves as the in-group and the Bears as the out-group). 1 mark for applying social identification (how campers adopt the Wolves' identity to boost self-esteem). 1 mark for applying social comparison (how the Wolves compare their cabin to the Bears cabin). 1 mark for explaining how out-group denigration/in-group favoritism leads to the hostile labeling ('lazy'/'cheaters') to achieve positive distinctiveness. Note: Maximum of 2 marks if no direct application to the 'Wolves' and 'Bears' scenario is made.

In his Experiment 7 variation, Milgram altered the physical proximity of the authority figure. The experimenter gave the initial instructions to the participant (the teacher) in the same room, but then left the laboratory. All subsequent commands to increase the shock level were given to the participant over the telephone from another room.

1 mark for describing how the experimenter left the laboratory room after the initial setup. 1 mark for describing that all subsequent instructions/orders were given to the participant via the telephone.

According to Social Impact Theory, the influence of a message depends on Strength, Immediacy, and Number of sources and targets. Elena's current approach is ineffective because of the divisional effect (number of targets): a single source (Elena) addressing 500 targets dilutes the social impact of her message across the large crowd. To improve effectiveness, Elena can: 1) Increase the 'Strength' of the source by involving respected student leaders or senior teachers to co-deliver the message, increasing its authority. 2) Increase 'Immediacy' by delivering the message face-to-face in closer physical proximity rather than from a distant stage. 3) Reduce the divisional effect of 'Number' by presenting the message to smaller tutor groups (e.g., 25 students) instead of all 500 at once, which increases the impact per student.

1 mark for explaining why the current single assembly approach is ineffective using the divisional effect (1 source vs 500 targets dilutes impact). 1 mark for suggesting how to increase Strength with a scenario-linked explanation (e.g., using peer leaders/senior staff). 1 mark for suggesting how to increase Immediacy with a scenario-linked explanation (e.g., closer physical proximity, small rooms). 1 mark for suggesting how to address the divisional effect of Number with a scenario-linked explanation (e.g., breaking the 500 students into small tutor groups). Note: Maximum 2 marks if there is no application to Elena's school scenario.

A weakness of Milgram's study is that it lacks ecological validity due to the artificial nature of both the setting and the task. Administering electric shocks to an innocent person in a university laboratory for failing a word-association test is not a situation that people encounter in everyday life. Therefore, the high levels of obedience observed may not reflect how people behave in response to authority figures in real-world environments.

1 mark for identifying the artificial/unnatural nature of the task or setting (e.g., giving electric shocks in a laboratory). 1 mark for explaining why this limits ecological validity or the generalizability of the findings to real-life obedience (e.g., because real-world authority orders do not typically involve inflicting physical pain as a memory test, meaning results may not apply to daily situations). Note: Do not credit answers that simply state 'it was a laboratory experiment' without explaining how this limits ecological validity.

To calculate the percentage of employees who did not obey: 1. Find the number of employees who did not obey: \(15 - 12 = 3\). 2. Divide this number by the total number of employees: \(\frac{3}{15} = 0.2\). 3. Multiply by 100 to find the percentage: \(0.2 \times 100 = 20\%\).

Award 1 mark for correct working and 1 mark for the correct answer. Working: \(\frac{3}{15} \times 100\) or equivalent (1 mark). Correct answer: 20% (or 20) (1 mark).

To calculate the median score: 1. Arrange the scores in ascending order: 9, 11, 12, 13, 14, 15, 16, 22. 2. Identify the two middle scores (4th and 5th values since \(N = 8\)): 13 and 14. 3. Calculate the mean of these two middle values: \(\frac{13 + 14}{2} = 13.5\).

Award 1 mark for correct working and 1 mark for the correct answer. Working: Shows the ordered data and/or the calculation \(\frac{13 + 14}{2}\) (1 mark). Correct answer: 13.5 (1 mark).

To calculate the mean: 1. Sum all the scores: \(8 + 14 + 6 + 12 + 10 + 11 + 9 + 13 + 15 + 7 = 105\). 2. Divide the sum by the total number of scores (\(N = 10\)): \(\frac{105}{10} = 10.5\).

Award 1 mark for correct working and 1 mark for the correct answer. Working: Sum of scores divided by 10, e.g., \(\frac{105}{10}\) (1 mark). Correct answer: 10.5 (1 mark).

### Indicative Content

#### AO1 (4 Marks - Knowledge and Understanding)
* Social Impact Theory (Latané, 1981) proposes that the amount of influence (impact) an authority figure has on an individual depends on three situational factors: Strength, Immediacy, and Number.
* **Strength (S):** Refers to the power, status, authority, or credibility of the source of influence (e.g., a police officer in uniform has more strength than a peer).
* **Immediacy (I):** Refers to the physical or temporal proximity of the source of influence to the target (e.g., an authority figure standing next to you has higher immediacy than one sending an email).
* **Number (N):** Refers to the quantity of sources directing the behavior relative to the number of targets (e.g., more sources increase pressure, but this has a diminishing marginal effect, known as the 'lightbulb analogy').
* The theory also describes the **divisional effect**, where the impact of an authority figure is divided/diffused if there are multiple targets (e.g., a teacher trying to control a large crowd of students vs. a single student).

#### AO3 (4 Marks - Evaluation and Analysis)
* **Strength (Supporting Evidence):** The theory is supported by field research, such as Sedikides and Jackson (1990) at a zoo, which showed that visitors were more likely to obey a request not to lean on a rail when the speaker was dressed as a zoo keeper (high Strength) and was in the same room (high Immediacy).
* **Strength (Application to Milgram):** Milgram's variation studies support the theory. When the experimenter gave instructions over the phone (low Immediacy), obedience fell from 65% to 22.5%. When an ordinary man gave instructions (low Strength), obedience dropped to 20%.
* **Weakness (Descriptive, not explanatory):** Social Impact Theory can be criticized for being more descriptive than explanatory. It mathematically predicts *when* obedience will change based on situational factors, but it fails to explain the cognitive or emotional processes behind *why* people obey (unlike Milgram's Agency Theory, which explains the agentic shift).
* **Weakness (Simplistic/Ignores Individual Differences):** The theory treats targets of social influence as passive recipients and fails to account for individual differences, such as locus of control or the authoritarian personality, which can cause some individuals to resist high-strength, high-immediacy authority figures.

### Marking Grid (8 marks: 4 marks AO1, 4 marks AO3)

| Level | Marks | Descriptor |
|---|---|---|
| **0** | 0 | No rewardable material. |
| **Level 1** | 1–2 | * Demonstrates isolated elements of knowledge and understanding (AO1).
* Attempt at evaluation is basic and lacks focus, structure, or supporting evidence (AO3). |
| **Level 2** | 3–4 | * Demonstrates limited/uneven knowledge and understanding of Social Impact Theory (AO1).
* Evaluation/analysis is present but lacks development or relies on a single point (AO3). |
| **Level 3** | 5–6 | * Demonstrates mostly accurate knowledge and understanding of Social Impact Theory (AO1).
* Evaluation/analysis is developed, with some logical structure and references to relevant evidence (AO3). |
| **Level 4** | 7–8 | * Demonstrates comprehensive, accurate, and thorough knowledge and understanding of Social Impact Theory, clearly defining S, I, and N (AO1).
* Evaluation/analysis is sophisticated, well-developed, and balanced, using multiple clear strengths/weaknesses to form a coherent conclusion (AO3). |

According to the Multi-Store Model of Memory, short-term memory (STM) has a very limited capacity, which is traditionally described as holding between 5 and 9 items (often referred to as 7 +/- 2 chunks of information). This capacity can be optimized or expanded by 'chunking' individual pieces of data into larger, single meaningful units.

Award 1 mark for stating the correct capacity (7 +/- 2 items or 5-9 chunks).
Award 1 mark for explaining how capacity can be increased (e.g., through chunking or grouping information).

Reject answers referring to duration (e.g., 18-30 seconds) as this does not address capacity.

Both reading the textbook and listening to the lyrics of a podcast are verbal tasks that require processing by the phonological loop (specifically the articulatory rehearsal component and phonological store). Because the phonological loop has a strictly limited capacity, trying to perform two verbal tasks simultaneously leads to cognitive overload and mutual interference, making it difficult for Chloe to focus on either task.

Award 1 mark for identifying that both tasks compete for processing within the same slave system (the phonological loop/articulatory loop/phonological store) (AO2).
Award 1 mark for explaining that this dual-task situation exceeds the limited capacity of that system, leading to cognitive interference/decreased performance (AO2).

Rationalisation is a cognitive process where an individual alters or distorts unfamiliar aspects of an event or story during recall. This is done to make the memory fit logically into their pre-existing mental frameworks, known as schemas, making the recalled information seem more sensible and familiar to them.

Award 1 mark for defining rationalisation as altering or distorting unfamiliar/unusual details to make them make sense (AO1).
Award 1 mark for linking this distortion to the individual's existing schemas or cultural expectations (AO1).

An advantage of using an independent groups design is that it eliminates order effects, such as the practice effect or fatigue. Since participants only complete one condition (either acoustic processing or semantic processing), they will not have the opportunity to practice remembering word lists, preventing artificial inflation of recall scores in the second condition.

Award 1 mark for identifying the avoidance of order effects (e.g., practice, fatigue, or boredom) (AO2).
Award 1 mark for linking the advantage specifically to the context of the word recall task (e.g., participants do not get better at recalling word lists or get tired of memory tests) (AO2).

Two key findings from Sebastian and Hernández-Gil (2012) are:
1) Verbal digit span (and thus phonological loop capacity) increases progressively with age from 5 years old through to adolescence (ending around 17 years old).
2) Spanish children show a lower digit span compared to Anglo-Saxon (English) children, which is explained by the fact that Spanish number words have more syllables (longer word length) and take longer to rehearse.

Award 1 mark for each valid finding stated (maximum of 2 marks total):
- Digit span increases with age from 5 to 17 years (1 mark).
- Spanish children had a lower digit span than English children (1 mark).
- The phonological loop capacity continues to develop/increase up to age 15, where it starts to level off (1 mark).
- Elderly participants/patients with frontotemporal dementia showed similar digit spans to very young children (1 mark).

Cognitive psychology research shows that memory recall is heavily dependent on retrieval cues. Liam can support his grandfather by introducing external retrieval cues, such as labeled photo albums, colour-coded signs, or diaries around the home. These environmental prompts can trigger the retrieval of information from long-term memory that his grandfather might otherwise struggle to access spontaneously.

Award 1 mark for suggesting a practical application/support strategy (e.g., using diaries, color coding, memory books, or music from their youth) (AO2).
Award 1 mark for linking this strategy to cognitive/memory theory (e.g., explaining that these act as retrieval cues to aid failing memory systems or target spared long-term memory stores) (AO2).

Step 1: Identify the decrease in the mean number of words recalled by subtracting the mean of Condition 2 from Condition 1: \(15 - 9 = 6\). Step 2: Calculate this decrease as a percentage of the original Condition 1 mean: \(\frac{6}{15} \times 100 = 40\%\).

1 mark for showing correct working: \(\frac{15 - 9}{15} \times 100\) (or equivalent). 1 mark for the correct percentage: \(40\%\) (accept 40).

Step 1: Write down the initial ratio of acoustically dissimilar participants to acoustically similar participants, which is \(18:6\). Step 2: Simplify the ratio by dividing both sides by the greatest common divisor, which is 6: \(18 \div 6 = 3\) and \(6 \div 6 = 1\). This gives the simplified ratio of \(3:1\).

1 mark for identifying the ratio as \(18:6\) (or showing equivalent working such as \(18/6\)). 1 mark for the correct simplified ratio: \(3:1\).

Step 1: Calculate the number of participants who did not falsely recall the critical lure by subtracting 27 from the total number of participants: \(45 - 27 = 18\). Step 2: Express this as a percentage of the total sample: \(\frac{18}{45} \times 100 = 40\%\). Alternatively: Calculate the percentage who did recall the lure: \(\frac{27}{45} \times 100 = 60\%\), then subtract from 100: \(100\% - 60\% = 40\%\).

1 mark for showing correct working: e.g., \(\frac{18}{45} \times 100\) or \(100 - \frac{27}{45} \times 100\). 1 mark for the correct percentage: \(40\%\) (accept 40).

### Indicative Content

#### AO1 (4 marks): Knowledge and understanding of the Working Memory Model
* The Working Memory Model (WMM) was proposed by Baddeley and Hitch (1974) as an active alternative to the Atkinson and Shiffrin Multi-Store Model's unitary short-term memory (STM) store.
* The **Central Executive** is an attentional controller with a limited capacity that monitors and coordinates incoming data, allocating tasks to the slave systems.
* The **Phonological Loop** handles verbal and auditory information. It is divided into the phonological store ('inner ear', holding spoken words for 1-2 seconds) and the articulatory rehearsal process ('inner voice', allowing sub-vocal repetition of written/spoken words).
* The **Visuo-spatial Sketchpad** handles visual and spatial information. It is split into the visual cache (which stores visual data like shape and colour) and the inner scribe (which records spatial arrangements).
* The **Episodic Buffer** (added by Baddeley in 2000) acts as a general, limited-capacity storage system that integrates spatial, visual, and verbal information from other components and links working memory to long-term memory.

#### AO3 (4 marks): Evaluation of the Working Memory Model
* **Strength (Experimental Evidence):** Dual-task studies support the existence of separate components. Baddeley et al. (1975) showed that participants had more difficulty doing two visual tasks simultaneously (using the same visuo-spatial sketchpad) than doing a visual and a verbal task at the same time, because separate components do not compete for resources.
* **Strength (Clinical Evidence):** Case studies of brain-damaged patients, such as KF, support the model. KF suffered STM impairment for verbal information (phonological loop) but his visual memory (visuo-spatial sketchpad) remained intact, showing that STM is not a single unitary store.
* **Weakness (The Central Executive is vague):** Cognitive psychologists argue that the Central Executive is the most important but least understood component of working memory. It is criticized for being a 'homunculus' (a little man inside the brain) and its exact mechanism has not been fully defined or isolated by research.
* **Weakness (Ecological Validity):** Many laboratory studies supporting the model utilize artificial, abstract tasks (e.g., dual-task tracking and repeating word lists) which do not reflect how we use working memory in everyday, naturalistic situations, lowering the ecological validity of the supporting research.

### Mark Scheme (8 marks: 4 marks AO1, 4 marks AO3)

| Level | Marks | Descriptor |
|---|---|---|
| **0** | 0 | No rewardable material. |
| **Level 1** | 1–2 | * Demonstrates isolated elements of knowledge and understanding (AO1).
* Evaluation is generic, weak, and assertion-based; lacks logical structure or link to the question (AO3). |
| **Level 2** | 3–4 | * Demonstrates some accurate knowledge and understanding (AO1).
* Evaluation is present but may be limited or lack development; arguments are mostly descriptive rather than analytical (AO3). |
| **Level 3** | 5–6 | * Demonstrates mostly accurate and detailed knowledge and understanding (AO1).
* Evaluation is developed and logical, with some balance showing both strengths and weaknesses, though one side may be stronger than the other (AO3). |
| **Level 4** | 7–8 | * Demonstrates precise, comprehensive, and structured knowledge and understanding (AO1).
* Evaluation is well-balanced, sophisticated, and leads to a coherent, logical conclusion based on psychological evidence (AO3). |

### Indicative Content

#### AO1 (6 marks): Knowledge and understanding of laboratory experiments
* Laboratory experiments are conducted in highly controlled environments where the researcher manipulates the independent variable (IV) to measure its effect on the dependent variable (DV), while minimizing extraneous variables.
* They use standardized procedures, meaning every participant experiences the same environment, instructions, and tasks (e.g., Baddeley's word lists or Milgram's verbal prods).
* In cognitive psychology, laboratory experiments are used to isolate specific mental processes, such as memory encoding or storage (e.g., Peterson and Peterson used a lab setting to measure the duration of short-term memory by controlling the retention interval and preventing rehearsal with a distractor task).
* In social psychology, laboratory settings have been used to create controlled social situations to study variables influencing behavior, such as obedience to authority (e.g., Milgram manipulated variables like proximity and location to observe their effect on obedience rate) or social identity (e.g., Tajfel's minimal group studies controlled group categorization to measure discrimination).

#### AO3 (6 marks): Evaluation of laboratory experiments in social and cognitive psychology
* **Strength (Internal Validity):** The high level of control over extraneous variables in both areas allows researchers to establish cause-and-effect relationships. For example, in cognitive psychology, Baddeley (1966b) could establish that semantic/acoustic similarity directly caused differences in recall, which would be impossible in a natural setting where noise and distraction cannot be controlled.
* **Strength (Reliability):** Standardized procedures allow for easy replication to test for reliability. Milgram's standardized prods and shock machine setup allowed him to replicate his study across multiple variations (e.g., telephonic instructions, ordinary man giving orders), ensuring consistency in how obedience was measured.
* **Weakness (Ecological Validity / Mundane Realism):** Lab tasks often lack mundane realism, which can limit the generalizability of the findings to real-life settings. In cognitive psychology, recalling meaningless consonant trigrams (Peterson and Peterson) or word lists (Baddeley) does not reflect how memory is used in daily life (e.g., remembering a shopping list or studying for an exam).
* **Weakness (Artificiality in Social Settings):** In social psychology, setting up an artificial laboratory environment can alter natural social behavior. Milgram's participants may have responded to the extreme and unusual demand characteristics of the laboratory, which does not accurately represent how obedience occurs in everyday environments, such as a workplace or hospital.
* **Weakness (Ethical Issues):** Laboratory experiments in social psychology often require deception and can cause psychological distress due to the artificial scenarios created (e.g., Milgram's participants believing they were harming someone). In contrast, cognitive laboratory experiments are generally less prone to severe ethical issues, though they can still cause minor anxiety or frustration.

### Conclusion
While laboratory experiments provide unmatched internal validity and reliability across both cognitive and social psychology, they face a trade-off with ecological validity. This issue is particularly pronounced in social psychology, where artificial laboratory structures can easily distort natural social dynamics, compared to cognitive psychology, where isolating specific cognitive structures requires a high level of environmental control.

### Marking Grid

| Level | Marks | Descriptor |
|---|---|---|
| **Level 4** | **10–12** | * **Detailed and accurate** knowledge and understanding of laboratory experiments as used in both social and cognitive psychology (AO1).
* **Sophisticated and balanced** evaluation of laboratory experiments, demonstrating critical analysis and drawing logical conclusions using relevant studies from both areas (AO3). |
| **Level 3** | **7–9** | * **Mostly accurate** knowledge and understanding of laboratory experiments in both social and cognitive psychology (AO1).
* **Developed** evaluation of laboratory experiments with some balance, using studies from one or both areas to support arguments (AO3). |
| **Level 2** | **4–6** | * **Some accurate** knowledge and understanding of laboratory experiments, but may focus heavily on one area of psychology over the other (AO1).
* **Limited** evaluation, which may be generic or lack depth and fail to connect directly to both cognitive and social examples (AO3). |
| **Level 1** | **1–3** | * **Isolated elements** of knowledge and understanding of laboratory experiments (AO1).
* **Generic or absent** evaluation, with little or no link to studies in social or cognitive psychology (AO3). |
| **0** | **0** | No rewardable material. |

Award 1 mark for describing the biological action of testosterone in the brain (e.g., its interaction with the amygdala/neural pathways).
Award 1 mark for linking this biological action to aggressive or dominant behaviour.

• 1 mark for stating that testosterone (an androgen/male hormone) acts on areas of the brain like the amygdala, altering neural sensitivity to emotional stimuli.
• 1 mark for explaining that this increases the likelihood of threat-reactivity, dominance-seeking, or lowered impulse control, resulting in physical or verbal aggression.

Award 1 mark for explaining the role of the prefrontal cortex in inhibiting impulses / regulating aggression.
Award 1 mark for explaining the role of the amygdala in generating emotional/aggressive reactions.
Award 1 mark for applying this imbalance of brain function directly to Liam's impulsive outbursts at work.

• 1 mark (AO2) for explaining that the prefrontal cortex is responsible for executive control and inhibiting aggression, which may be underactive or impaired in Liam.
• 1 mark (AO2) for explaining that Liam's amygdala (part of the limbic system) is responsible for rapid emotional processing and triggering aggressive impulses.
• 1 mark (AO2) for linking these mechanisms to Liam's scenario (e.g., explaining that without adequate prefrontal regulation, Liam cannot suppress his immediate angry impulses when frustrated at work).

Award 1 mark for defining Thanatos as the unconscious death instinct or drive.
Award 1 mark for explaining how this drive is redirected outward to cause aggression in order to protect the self.

• 1 mark for stating that Thanatos is Freud's term for the unconscious, biological drive towards death, decay, and self-destruction.
• 1 mark for explaining that the ego redirects this energy away from the self towards others, resulting in outward aggression as a defense mechanism to preserve the individual.

Award 1 mark for describing the build-up of aggressive psychic energy in Sarah due to her difficult day.
Award 1 mark for explaining that punching the bag acts as a safe displacement channel for this drive.
Award 1 mark for stating that this release results in catharsis, which reduces her internal drive and aggressive tension.

• 1 mark (AO2) for identifying that Sarah has a accumulation of aggressive/psychic energy from her frustrating day.
• 1 mark (AO2) for identifying that punching the boxing bag represents a displacement mechanism, transferring her anger to an inanimate, safe target.
• 1 mark (AO2) for explaining that this activity provides catharsis, which releases/purges this unconscious energy and reduces her subsequent desire to behave aggressively.

Award 1 mark for explaining the evolutionary pressure of paternal uncertainty or cuckoldry.
Award 1 mark for explaining how aggressive mate retention strategies are adaptive behaviours used to prevent this risk.

• 1 mark for explaining the threat of cuckoldry/paternal uncertainty, where males risk investing resources in offspring that do not carry their genes.
• 1 mark for explaining that aggressive mate retention (e.g., vigilance, direct guarding, or threats of violence) is an adaptive mechanism evolved to deter rival mates and secure exclusive access to the partner.

Award 1 mark for explaining the genetic difference between MZ and DZ twins (\(100\%\) vs \(50\%\) shared genes).
Award 1 mark for explaining that a higher concordance rate in MZ twins indicates genetic influence.
Award 1 mark for explaining that an MZ concordance rate of less than \(100\%\) indicates the role of environmental factors.

• 1 mark (AO2) for identifying that MZ twins share \(100\%\) of their genetic material whereas DZ twins share only \(50\%\) on average, whilst both pairs typically share similar environments.
• 1 mark (AO2) for explaining that if aggression is genetically influenced, MZ twins will show a higher concordance rate for aggression than DZ twins.
• 1 mark (AO2) for explaining that if the concordance rate in MZ twins is not a full \(100\%\), this demonstrates that environmental factors must also interact with genetics to influence aggression.

Model Response:

One biological explanation for Marcus's aggression is the role of hormones, specifically testosterone. Testosterone is an androgen linked to competitive dominance and aggression (AO1). During a physical, competitive sport like rugby, Marcus’s testosterone levels may spike. This hormonal surge increases his drive for dominance and reduces fear, which could explain why he reacts to competitive friction by starting physical fights with opponents rather than walking away (AO2).

Additionally, brain structures such as the amygdala and the prefrontal cortex play a critical role. The amygdala, part of the limbic system, processes emotional stimuli and triggers fear and anger in response to perceived threats (AO1). During a match, if an opponent tackles Marcus hard, his amygdala may overreact, perceiving the tackle as a personal threat and triggering immediate anger (AO2).

Normally, the prefrontal cortex (PFC) regulates these emotional responses by exercising executive control and inhibiting impulsive aggression (AO1). However, if Marcus has reduced functioning or under-activity in his prefrontal cortex, he will lack the cognitive control to suppress his amygdala-driven anger. This deficit in top-down regulation explains why he cannot control his impulses and instead engages in physical fights on the rugby pitch (AO2).

Indicative Content:

AO1 (4 marks):
- Testosterone is an androgenic hormone associated with dominance, competitiveness, and aggression.
- The amygdala (part of the limbic system) is responsible for processing emotions, identifying threats, and triggering the fight-or-flight response.
- The prefrontal cortex (PFC) acts as an executive control centre, inhibiting impulsive, aggressive behaviour driven by the limbic system.
- Low levels of serotonin or high testosterone can reduce PFC activity, leading to poorer self-regulation.

AO2 (4 marks):
- High-contact, competitive rugby matches are likely to elevate Marcus's testosterone levels, motivating him to assert dominance physically over opponents.
- When physically challenged or tackled on the field, Marcus's amygdala may perceive this as a high-level threat, triggering an anger response.
- Marcus's aggression and subsequent physical fights suggest his prefrontal cortex is failing to inhibit these aggressive impulses triggered during the match.
- The combination of a highly active amygdala and an underactive PFC explains why Marcus acts out physically rather than maintaining sporting discipline.

Level Descriptors:
- Level 1 (1–2 Marks): Demonstrates isolated elements of biological knowledge. Minimal application to Marcus's scenario.
- Level 2 (3–4 Marks): Demonstrates some biological knowledge of hormones/brain structures. Scrappy or limited application to Marcus.
- Level 3 (5–6 Marks): Demonstrates mostly accurate biological knowledge. Clearly applies the concepts to Marcus's rugby context, though one element (hormones or brain structure) may be slightly stronger than the other.
- Level 4 (7–8 Marks): Demonstrates detailed, accurate biological knowledge of both hormones and brain structure. Applies this knowledge seamlessly to Marcus's rugby matches, explaining both the biological mechanisms and their direct application to his physical fights.

In classical conditioning, extinction is the process by which a learned association is broken. When the conditioned stimulus (such as a bell) is repeatedly presented without being followed by the unconditioned stimulus (such as food), the association between the two stimuli weakens. As a result, the conditioned response (such as salivation) decreases in frequency and eventually ceases.

Award 1 mark for identifying that the conditioned stimulus is presented without the unconditioned stimulus (AO1). Award 1 mark for explaining that this leads to the reduction/loss of the conditioned response (AO1). Reject answers referring to operant conditioning concepts (e.g., lack of reinforcement).

Both positive and negative reinforcement aim to increase the frequency of a desired behavior. However, they do so through different mechanisms. Positive reinforcement works by introducing a rewarding stimulus (like a treat or praise) immediately after the target behavior. Negative reinforcement works by taking away an aversive or unpleasant stimulus (like an alarm or pain) once the target behavior is performed.

Award 1 mark for describing positive reinforcement as adding a desirable stimulus to increase behavior (AO1). Award 1 mark for describing negative reinforcement as removing an undesirable stimulus to increase behavior (AO1). Reject answers that confuse negative reinforcement with punishment.

Bandura, Ross and Ross (1961) assessed the children's pre-existing aggression levels on four five-point rating scales and matched them into triplets of similar aggression. This matched-pairs design is a major strength because it controls for individual differences (participant variables) in natural aggressiveness. Without this control, any differences in post-observation aggression could have been attributed to some groups having naturally more aggressive children, which would have compromised the internal validity of the study.

Award 1 mark for identifying the control of participant variables/pre-existing aggression levels (AO1). Award 1 mark for linking this strength to the internal validity of Bandura's study (AO2). Reject generic strengths of matched pairs that are not applied to the study of aggression.

According to Social Learning Theory, individuals learn through observation and imitation. In this scenario, the older sibling acts as a role model. When the sibling is praised, the younger child experiences vicarious reinforcement. The child learns that sharing behavior leads to positive outcomes (social reward/praise), which increases their own motivation to reproduce the sharing behavior in the future.

Award 1 mark for identifying the older sibling as a role model or identifying the observation of vicarious reinforcement (AO2). Award 1 mark for explaining that this motivates the child to imitate the behavior of sharing (AO2). Reject answers that do not apply the theory to the scenario.

In operant conditioning, a fixed-ratio schedule provides reinforcement only after a specific, predetermined number of responses have been made (e.g., FR-5). This schedule typically results in a very high and steady rate of response because the organism learns that more responses lead directly to more rewards. However, there is often a characteristic short pause in responding immediately after a reinforcement is delivered, known as a post-reinforcement pause.

Award 1 mark for correctly identifying the 'fixed-ratio schedule' (AO1). Award 1 mark for describing the resulting response pattern, such as a high response rate or the post-reinforcement pause (AO1).

**(a) Mean Calculation:**
- Group A: \((12 + 16 + 14 + 18 + 15) / 5 = 75 / 5 = 15\)
- Group B: \((6 + 8 + 7 + 11 + 8) / 5 = 40 / 5 = 8\)

**(b) Range Calculation:**
- Group A: Highest value (18) - Lowest value (12) = 6
- Group B: Highest value (11) - Lowest value (6) = 5

**(c) Graph Selection and Justification:**
- The most appropriate graph is a **bar chart**.
- This is because the independent variable (type of conditioning) consists of discrete, nominal conditions, while the dependent variable (mean salivary drops) is continuous. A bar chart is the standard way to compare discrete group means.

**(a) Mean: 1 mark**
- 1 mark for both means calculated correctly: Group A = 15 and Group B = 8.

**(b) Range: 1 mark**
- 1 mark for both ranges calculated correctly: Group A = 6 (accept 12 to 18) and Group B = 5 (accept 6 to 11).

**(c) Graph Selection & Justification: 2 marks**
- 1 mark for identifying a **bar chart** / bar graph.
- 1 mark for explaining that it is appropriate because the independent variable is nominal/categorical (independent groups) and the dependent variable is continuous (interval/ratio scale).

*Do not accept histogram, line graph, or scatterplot.*

**(a) Graph type:**
- A **scatter graph** (or scatterplot) is the correct choice because the researcher is plotting two continuous co-variables to see if there is a relationship/correlation between them.

**(b) Axes construction:**
- The X-axis should be labelled 'Age (months)' with a scale covering 30 to 65.
- The Y-axis should be labelled 'Number of aggressive acts' with a scale covering 0 to 12.
- Each child's age and aggressive acts are plotted as individual coordinate points.

**(c) Direction of relationship:**
- The data shows a **positive correlation** because as age increases, the number of aggressive acts also increases.

**(a) Graph type: 1 mark**
- 1 mark for identifying a scatter diagram / scatter graph / scatterplot.

**(b) Axes description: 1 mark**
- 1 mark for stating that age (months) should be on one axis and the number of aggressive acts on the other axis, with both axes clearly labelled with appropriate scales.

**(c) Direction: 1 mark**
- 1 mark for stating that it shows a **positive correlation** / positive relationship.

Indicative Content: AO1 (Knowledge and Understanding): Social Learning Theory (SLT) suggests learning occurs observationally through modeling and imitation of role models. It emphasizes cognitive mediational processes that occur between stimulus and response: attention (noticing the behaviour), retention (coding and remembering the behaviour), reproduction (the physical ability to perform the behaviour), and motivation (the expectation of reinforcement). It incorporates vicarious reinforcement, where an observer mimics behaviour after seeing a model rewarded. This differs from classical conditioning (learning via association of stimuli, as demonstrated by Pavlov) and operant conditioning (learning via direct reinforcement or punishment, as demonstrated by Skinner), which do not account for cognitive mediation. AO3 (Evaluation/Analysis): Strong empirical support comes from observational studies such as Bandura, Ross and Ross (1961), which showed children exposed to an aggressive model imitated the exact physical and verbal aggressive behaviours, proving observational learning occurs. However, these observational studies often suffer from demand characteristics and artificial settings; hitting a Bobo doll in a lab does not necessarily reflect real-world aggression, reducing ecological validity. Compared to strict conditioning paradigms, SLT provides a more complete explanation of complex human actions, as conditioning struggles to explain how new behaviours are acquired quickly without direct trial-and-error reinforcement. Nonetheless, SLT underestimates biological factors; for instance, in Bandura's studies, boys consistently displayed higher levels of physical aggression than girls, which is better explained by biological differences such as higher testosterone levels rather than purely social modeling.

AO1: 4 marks, AO3: 4 marks. Level 1 (1-2 marks): Demonstrates isolated knowledge of SLT, conditioning, or studies. Evaluation is absent or highly generic. Level 2 (3-4 marks): Demonstrates some accurate knowledge of SLT processes and makes simple references to conditioning or observational studies. Evaluation is present but lacks depth and structure. Level 3 (5-6 marks): Demonstrates mostly accurate and detailed knowledge of SLT, clearly contrasting it with conditioning paradigms and supporting it with observational studies. Evaluation is developed and offers logical, critical points. Level 4 (7-8 marks): Demonstrates precise, comprehensive knowledge of SLT, seamlessly integrated with conditioning paradigms and observational studies. Evaluation is highly sophisticated, balanced, and leads to a reasoned conclusion.

Indicative Content: AO1 (Knowledge and Understanding): Social Learning Theory (SLT) suggests learning occurs observationally through modeling and imitation of role models. It emphasizes cognitive mediational processes that occur between stimulus and response: attention (noticing the behaviour), retention (coding and remembering the behaviour), reproduction (the physical ability to perform the behaviour), and motivation (the expectation of reinforcement). It incorporates vicarious reinforcement, where an observer mimics behaviour after seeing a model rewarded. This differs from classical conditioning (learning via association of stimuli, as demonstrated by Pavlov) and operant conditioning (learning via direct reinforcement or punishment, as demonstrated by Skinner), which do not account for cognitive mediation. AO3 (Evaluation/Analysis): Strong empirical support comes from observational studies such as Bandura, Ross and Ross (1961), which showed children exposed to an aggressive model imitated the exact physical and verbal aggressive behaviours, proving observational learning occurs. However, these observational studies often suffer from demand characteristics and artificial settings; hitting a Bobo doll in a lab does not necessarily reflect real-world aggression, reducing ecological validity. Compared to strict conditioning paradigms, SLT provides a more complete explanation of complex human actions, as conditioning struggles to explain how new behaviours are acquired quickly without direct trial-and-error reinforcement. Nonetheless, SLT underestimates biological factors; for instance, in Bandura's studies, boys consistently displayed higher levels of physical aggression than girls, which is better explained by biological differences such as higher testosterone levels rather than purely social modeling.

AO1: 4 marks, AO3: 4 marks. Level 1 (1-2 marks): Demonstrates isolated knowledge of SLT, conditioning, or studies. Evaluation is absent or highly generic. Level 2 (3-4 marks): Demonstrates some accurate knowledge of SLT processes and makes simple references to conditioning or observational studies. Evaluation is present but lacks depth and structure. Level 3 (5-6 marks): Demonstrates mostly accurate and detailed knowledge of SLT, clearly contrasting it with conditioning paradigms and supporting it with observational studies. Evaluation is developed and offers logical, critical points. Level 4 (7-8 marks): Demonstrates precise, comprehensive knowledge of SLT, seamlessly integrated with conditioning paradigms and observational studies. Evaluation is highly sophisticated, balanced, and leads to a reasoned conclusion.

AO1: Raine et al. (1997) investigated brain abnormalities in 41 murderers pleading Not Guilty by Reason of Insanity (NGRI) and 41 matched controls using Positron Emission Tomography (PET) during a continuous performance task. They found reduced glucose metabolism in the prefrontal cortex and corpus callosum, alongside abnormal asymmetrical activity in subcortical structures (e.g., the amygdala and hippocampus). Watson and Rayner (1920) investigated classical conditioning in an 11-month-old infant (Little Albert) by pairing a white rat (neutral stimulus) with a loud noise (unconditioned stimulus) to elicit fear (conditioned response), demonstrating that emotional associations can be learned and generalise to other white furry stimuli. AO3: Ethical considerations differ. Watson and Rayner breached the ethical guideline of protection from harm by deliberately inducing distress in an infant and failing to extinguish the conditioned fear before he left. Raine et al. faced ethical challenges regarding informed consent, as NGRI participants may lack the cognitive capacity to fully consent, and PET scans are invasive due to the injection of a radioactive tracer. In terms of scientific credibility, Raine et al. employed highly objective, quantitative neuroimaging and controlled for extraneous variables using a matched-pairs design, but the results are purely correlational (they cannot prove brain dysfunction causes violence). Watson and Rayner achieved high internal validity via laboratory control over extraneous variables, establishing direct cause-and-effect, but their study suffers from low generalisability because it was an idiographic case study of a single infant (N=1). Both studies significantly advanced psychology but did so under severe methodological or ethical constraints.

Marking scheme (12 marks total): AO1 (6 marks) and AO3 (6 marks). Level 4 (10-12 marks): Demonstrates detailed, highly accurate knowledge of both classic studies (AO1). Offers a balanced, well-developed evaluation of ethics and scientific credibility, leading to a logical and coherent conclusion (AO3). Level 3 (7-9 marks): Demonstrates mostly accurate knowledge of both studies (AO1). Evaluation of ethics and scientific credibility is structured but may focus more on one study or one aspect (AO3). Level 2 (4-6 marks): Basic knowledge of studies with some gaps or minor inaccuracies (AO1). Limited evaluation with simple, underdeveloped points made about ethics or credibility (AO3). Level 1 (1-3 marks): Descriptive and superficial response with minimal accuracy (AO1) and little to no relevant evaluation (AO3). Reject: Evaluation of unrelated studies (e.g. Milgram or Baddeley) instead of the specified classic studies.