2024 IB DP Psychology Practice Paper with Answers

Hormones are chemical messengers secreted by endocrine glands directly into the bloodstream. One key hormone that affects human behaviour is cortisol, which is released by the adrenal glands in response to stress. Cortisol plays a critical role in the body's 'fight or flight' response, but prolonged or elevated levels of cortisol have been shown to negatively affect cognitive processes, specifically verbal declarative memory (the ability to recall facts and events).

The hippocampus, a brain structure highly involved in memory consolidation, contains a high density of cortisol receptors. When cortisol levels are excessively high, it can overstimulate these receptors, leading to temporary or permanent impairment in memory retrieval and consolidation.

This relationship was investigated by Newcomer et al. (1999) in a double-blind, randomized controlled trial. The researchers aimed to investigate whether high levels of the stress hormone cortisol have a negative effect on verbal declarative memory. The sample consisted of healthy participants who were split into three conditions for four days: Group 1 received a high dose of cortisol (160 mg per day, equivalent to cortisol levels seen in highly stressful events); Group 2 received a low dose of cortisol (40 mg per day, equivalent to mild stress); and Group 3 received a placebo.

Participants were asked to listen to and recall parts of a prose paragraph to test their verbal declarative memory. The results showed that participants in the high-cortisol condition performed significantly worse on the verbal declarative memory test compared to those in the low-cortisol and placebo conditions. This impairment was temporary, as memory performance returned to normal after the tablet treatment ceased.

This study demonstrates a clear causal link between elevated cortisol levels and impaired verbal declarative memory, illustrating how a specific hormone can directly influence human cognitive behaviour.

Marks are awarded based on the following rubric:

- **1 to 3 marks**: The response is limited, containing basic or inaccurate knowledge about the hormone and its effect. The selected study is either highly inaccurate, irrelevant, or missing.
- **4 to 6 marks**: The response shows some accurate knowledge of the hormone and its effect on behaviour. A relevant study is described with some accuracy (e.g., aim and results are mentioned but the methodology may be vague), but the connection between the study and the hormonal effect is weak or descriptive rather than explanatory.
- **7 to 9 marks**: The response demonstrates accurate and detailed knowledge of the hormone (cortisol) and how it affects behaviour (verbal declarative memory). A relevant study (e.g., Newcomer et al., 1999) is accurately described (aim, method, findings) and explicitly linked to the question, showing a clear, analytical understanding of how the hormone influences behaviour.

Schema theory is a cognitive theory that suggests human memory and experience are organized by 'schemas'—mental representations of knowledge, beliefs, and expectations about the world. Derived from past experiences, schemas function as cognitive shortcuts that help individuals process vast amounts of information efficiently by predicting what to expect in specific situations.

However, schemas can also lead to systematic errors or distortions in memory retrieval. This occurs through reconstructive memory, where individuals fill in gaps in their actual recall with schema-consistent information that was not actually present, or ignore details that do not fit their active schema.

This phenomenon was demonstrated in a classic study by Brewer and Treyens (1981). The study aimed to investigate whether people's memory for objects in an office is influenced by their 'office schema'. The participants (86 university students) were individualy seated in an office-like room for 35 seconds. The room contained standard office items (e.g., desk, calendar, typewriter) as well as highly atypical, non-schema-consistent items (e.g., a skull, a bark basket, a toy top). Critically, typical office items like books were omitted from the room. Participants were then moved to another room and asked to write down everything they could remember.

The results showed that most participants recalled typical office items that were actually in the room, but many also recalled typical office items that were *not* present, such as books. Furthermore, many participants failed to recall the highly atypical items like the skull, although those who did recall them often placed them in highly schema-consistent locations.

This study supports schema theory by demonstrating that human memory is not a passive recording device. Instead, memory is active and reconstructive, relying on pre-existing mental schemas to fill in missing information, which can lead to predictable, schema-consistent errors.

Marks are awarded based on the following rubric:

- **1 to 3 marks**: The response shows a limited understanding of schema theory. The study described is either missing, irrelevant, or highly inaccurate.
- **4 to 6 marks**: The response explains the basic concept of schemas, but lacks depth or clarity. A relevant study (e.g., Brewer and Treyens, 1981) is outlined with some accurate details, but the link between the study's findings and the theoretical mechanisms of schemas is not fully developed.
- **7 to 9 marks**: The response provides a clear, accurate, and detailed explanation of schema theory, highlighting concepts such as cognitive shortcuts and reconstructive memory. A relevant study is accurately described (aim, method, results) and explicitly linked to show how schemas influence memory encoding and retrieval.

Social Identity Theory (SIT), developed by Henri Tajfel and John Turner, suggests that an individual's self-concept and self-esteem are significantly derived from their membership in social groups. According to SIT, people naturally categorize the world into 'in-groups' (groups to which they belong) and 'out-groups' (groups to which they do not belong).

SIT describes four primary cognitive mechanisms:
1. **Social Categorization**: Grouping people into categories to simplify the social environment.
2. **Social Identification**: Adopting the identity, values, and norms of the in-group.
3. **Social Comparison**: Comparing the in-group with out-groups.
4. **Positive Distinctiveness**: The motivation to make the in-group appear superior to out-groups on valued dimensions, which enhances the collective self-esteem of in-group members.

Tajfel et al. (1971) investigated these mechanisms through the 'Minimal Group Paradigm'. The aim was to see if simple categorization into arbitrary groups, with no prior history or conflict, would lead to in-group favoritism and out-group discrimination. The sample consisted of British schoolboys who were randomly assigned to groups based on trivial criteria (whether they estimated the number of dots on a screen or preferred paintings by Klee or Kandinsky). The boys were then asked to distribute rewards (points convertible to money) to other boys using matrix books.

The results showed that the boys consistently allocated more points to members of their own group (in-group favoritism) rather than the out-group. Furthermore, when given the choice, they chose matrix options that maximized the *difference* between the groups (positive distinctiveness), even if it meant giving their own in-group fewer absolute points overall.

This study supports SIT by demonstrating that the mere cognitive act of categorization (into 'us' and 'them') is sufficient to trigger in-group favoritism and out-group discrimination, as individuals seek to establish positive distinctiveness to boost their self-concept.

Marks are awarded based on the following rubric:

- **1 to 3 marks**: The response shows limited or inaccurate knowledge of Social Identity Theory. The description of the study is either absent or mostly inaccurate.
- **4 to 6 marks**: The response explains some key concepts of SIT (e.g., in-groups/out-groups) but may not fully articulate all four stages. A relevant study (e.g., Tajfel et al., 1971) is described with some accuracy, but the connection between the study's results (e.g., point allocation strategies) and SIT concepts is not fully explained.
- **7 to 9 marks**: The response provides a detailed and accurate explanation of SIT (including categorization, comparison, and positive distinctiveness). A highly relevant study is described accurately (including details about the minimal group design and findings) and explicitly linked to show how categorization leads to positive distinctiveness.

### Model Essay Outline & Synthesis

**1. Introduction**
* **Define the Cognitive Process:** Memory is the cognitive process of encoding, storing, and retrieving information.
* **Define Reliability:** In cognitive psychology, reliability refers to the accuracy, consistency, and truthfulness of cognitive representations over time.
* **Thesis Statement:** While traditional cognitive models suggested memory acts like a recording device, contemporary research demonstrates that memory is reconstructive. It is susceptible to distortion from post-event information and preexisting schemas, suggesting low reliability. However, research into highly emotional or high-stakes real-world events indicates that memory can also display remarkable reliability, meaning its accuracy is highly dependent on situational context.

**2. Theoretical Framework: Schema Theory and Reconstructive Memory**
* **Reconstructive Memory:** This theory suggests that remembering is not a passive retrieval of a literal recording, but an active reconstruction of the event. When a memory is retrieved, we use mental shortcuts (schemas) to rebuild the event, filling in gaps with what 'makes sense' or what is expected.
* **Schema Influence:** Pre-existing mental representations (schemas) can lead to distortion during encoding, storage, and retrieval through processes like rationalization (making memories fit expectations), sharpening (emphasizing certain details), and leveling (omitting details).

**3. Empirical Evidence Supporting Unreliability: Loftus and Palmer (1974)**
* **Aim:** To investigate whether leading questions could influence the estimation of vehicle speed and distort subsequent eyewitness memory.
* **Method (Experiment 1):** 45 participants watched clips of car accidents and were asked questions, including a critical question about speed: "About how fast were the cars going when they [hit / smashed / collided / bumped / contacted] each other?"
* **Results:** The verb "smashed" yielded the highest speed estimate (mean = 40.5 mph), while "contacted" yielded the lowest (mean = 31.8 mph).
* **Method (Experiment 2):** 150 participants watched a multi-car accident. One group got "smashed", another "hit", and a control group had no speed question. One week later, without viewing the clip again, they were asked: "Did you see any broken glass?" (there was none).
* **Results:** More participants in the "smashed" condition (32%) falsely remembered broken glass compared to the "hit" condition (14%) and control (12%).
* **Link:** This demonstrates that post-event misleading information (the verb used in the question) can integrate into the original memory trace, altering its reconstruction and showing that memory can be highly unreliable.

**4. Empirical Evidence Supporting Reliability: Yuille and Cutshall (1986)**
* **Aim:** To investigate the reliability of eyewitness testimony in a real-life, high-stress situation.
* **Method:** 13 eyewitnesses to a real gun shooting in Vancouver, Canada (where a thief was shot dead by a store owner) were interviewed by researchers 4 to 5 months after the incident. Their accounts were compared to their original police statements. They were also asked two leading questions: one about a "busted headlight" (when there was none) and one about a "yellow quarter panel" (the panel was actually blue).
* **Results:** Eyewitness recall was highly accurate even after 5 months, showing 79% to 84% accuracy compared to original police statements. Furthermore, the leading questions had virtually no effect on their accuracy; they did not succumb to the misinformation effect.
* **Link:** This study challenges the view that human memory is inherently unreliable, suggesting that in real-world settings involving high emotional arousal and personal significance, memory can be exceptionally robust and resistant to distortion.

**5. Critical Thinking and Evaluation**
* **Methodological Differences:** Loftus and Palmer used laboratory experiments with high internal validity but low ecological validity (participants watched video clips of accidents and lacked the emotional arousal of real-life eyewitnesses). In contrast, Yuille and Cutshall conducted a naturalistic field study with high ecological validity but low control over confounding variables (e.g., post-event rehearsal, media exposure).
* **The Role of Emotion / Flashbulb Memories:** High levels of stress and adrenaline (as seen in Yuille and Cutshall) may trigger stronger biological encoding mechanisms (involving the amygdala), resulting in vivid, highly durable, and accurate memories. Conversely, laboratory settings do not activate these physiological mechanisms to the same extent.
* **Constructive vs. Reconstructive:** Memory may be reconstructive primarily when the original trace is weak or insignificant (such as watching a minor traffic clip). When the event is highly impactful, the core details of the event remain highly reliable, even if minor details occasionally drift.

**6. Conclusion**
* Reconstructive memory theory highlights the potential for cognitive biases and post-event information to distort memory, as demonstrated in laboratory research.
* However, the reliability of memory is not uniform; it is context-dependent. Under naturalistic, personally relevant, and highly emotional conditions, human memory exhibits a high degree of reliability, suggesting that the mind's reconstructive processes do not always compromise accuracy.

### Marking Scheme (IB Assessment Criteria for ERQs)

**Criterion A: Focus on the question (2 marks)**
* **2 marks:** The response is fully focused on the question, identifying a specific cognitive process (memory) and consistently addressing its reliability throughout.
* **1 mark:** The response identifies a cognitive process but focus on its reliability is inconsistent or superficial.

**Criterion B: Knowledge and understanding (6 marks)**
* **5-6 marks:** Explains reconstructive memory, schema theory, and the concept of reliability in depth. The explanation is accurate, clear, and demonstrates a sophisticated grasp of cognitive psychology.
* **3-4 marks:** Demonstrates basic knowledge of reconstructive memory or schema theory, but explanations of how these concepts affect reliability are limited or contain minor inaccuracies.
* **1-2 marks:** Minimal or descriptive knowledge of memory, with little to no theoretical framework.

**Criterion C: Use of research to support psychological knowledge (6 marks)**
* **5-6 marks:** Descriptions of relevant studies (e.g., Loftus and Palmer, 1974; Yuille and Cutshall, 1986) are accurate, detailed, and directly applied to argue both for and against the reliability of memory.
* **3-4 marks:** Studies are described but lack key details (e.g., sample, specific findings), or the connection between the studies and the concept of reliability is weakly explained.
* **1-2 marks:** Studies are highly inaccurate, irrelevant, or merely mentioned without description.

**Criterion D: Critical thinking (6 marks)**
* **5-6 marks:** Evaluation is consistent, well-developed, and balanced. The response evaluates the research methodologically (laboratory vs. field studies, ecological validity) and theoretically (discussing how stress/emotion alters memory encoding). Synthesizes opposing viewpoints to reach a nuanced conclusion.
* **3-4 marks:** Evaluation is present but superficial, relying on generic critiques (e.g., "low ecological validity" without explaining why this matters for the argument) or is heavily one-sided.
* **1-2 marks:** Very limited or no critical thinking/evaluation.

**Criterion E: Clarity and organisation (2 marks)**
* **2 marks:** The essay is well-structured, follows a logical progression, and uses appropriate psychological terminology throughout.
* **1 mark:** The essay has some structure but lacks clear logical flow or transitions between paragraphs.

### Indicative Content

**Introduction**
* **Define Health Promotion:** State that health promotion is the process of enabling people to increase control over, and to improve, their health (WHO). It goes beyond individual behavior to look at social and environmental interventions.
* **Identify Strategies:** Introduce the specific strategies to be discussed, such as **fear appeals** (cognitive-behavioral approach) and **social marketing campaigns** (community/population-wide approach).
* **Thesis Statement:** State that while both strategies can be effective, their success depends heavily on psychological principles such as self-efficacy and target-audience tailoring, and they face common methodological challenges in measuring long-term behavioral change.

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### Strategy 1: Social Marketing Campaigns (e.g., The TRUTH Campaign)
* **Conceptual Framework:** Social marketing uses commercial marketing principles (the '4 Ps': Product, Price, Place, Promotion) to influence social and health behaviors for the benefit of society rather than financial profit.
* **Focus Study: Sly et al. (2002)**
* **Aim:** To investigate the effectiveness of the 'TRUTH' anti-smoking campaign in Florida.
* **Methodology:** A longitudinal survey of youth in Florida to measure their exposure to the campaign and their subsequent smoking status.
* **Findings:** There was a strong correlation between high exposure to the TRUTH campaign (which targeted the manipulative tactics of tobacco companies rather than just the physical dangers of smoking) and a lower likelihood of starting smoking.
* **Link:** This demonstrates how appealing to youth identity and challenging authority can be a highly successful social marketing message compared to traditional 'just say no' approaches.

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### Strategy 2: Fear Appeals (e.g., Protection Motivation Theory)
* **Conceptual Framework:** Fear appeals attempt to motivate health-promoting behavior by inducing fear about the consequences of continuing unhealthy behaviors. According to Rogers' Protection Motivation Theory (1975), a fear appeal is effective if it establishes high threat severity and vulnerability, combined with high response efficacy (the solution works) and self-efficacy (the individual can do it).
* **Focus Study: Peckmann and Reibling (2006)**
* **Aim:** To investigate the effectiveness of different types of anti-smoking public service announcements (PSAs) on adolescents.
* **Methodology:** Adolescents were randomly assigned to view videos containing different types of anti-smoking ads (e.g., focusing on health consequences, cosmetic consequences, or social rejection/corporate manipulation).
* **Findings:** Fear appeals focusing on social rejection and the immediate disgust of others were significantly more effective in reducing intentions to smoke among teens than those focusing solely on long-term disease, highlighting that 'fear' must be personally relevant to the target demographic.

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### Evaluation and Critical Thinking (Discussion)
* **Ethical Considerations:** Fear appeals can cause unnecessary anxiety or guilt. If self-efficacy is low, fear appeals can lead to defensive avoidance (denial) rather than behavior change.
* **Methodological Limitations of Health Research:**
* Most studies rely on self-report measures of behavioral intention rather than direct observation of long-term health behavior change.
* It is difficult to isolate the effects of a single health promotion strategy from confounding variables (e.g., simultaneous price increases on tobacco, changes in legislation, parental influence).
* **Cultural and Demographic Factors:** Campaigns designed for one cultural demographic may not translate effectively to another. Tailored, culturally sensitive health messaging (e.g., using local community leaders) generally shows higher efficacy.

### IB Psychology Paper 2 ERQ Rubric (22 Marks)

**Criterion A: Focus on the question (2 marks)**
* **2 marks:** The response is fully focused on the question, with a clear thesis and highly relevant introduction/definitions of health promotion strategies.
* **1 mark:** The response identifies health promotion but lacks a clear focus on specific strategies or has limited structural direction.

**Criterion B: Knowledge and understanding (6 marks)**
* **5-6 marks:** Demonstrates detailed, accurate, and comprehensive knowledge of health promotion strategies (e.g., social marketing, fear appeals) and the underlying psychological theories.
* **3-4 marks:** Demonstrates relevant knowledge of health promotion but with some gaps or minor inaccuracies.
* **1-2 marks:** Minimal or highly generalized knowledge of health promotion.

**Criterion C: Use of research to support decals (6 marks)**
* **5-6 marks:** Relevant psychological studies (e.g., Sly et al., Peckmann and Reibling) are chosen, accurately described, and explicitly linked to the evaluation of the strategies.
* **3-4 marks:** Studies are described but their relevance to the specific health promotion strategies is not fully explained.
* **1-2 marks:** Descriptive research with little or no integration into the argument.

**Criterion D: Critical thinking (6 marks)**
* **5-6 marks:** Critical evaluation is consistent and well-developed. Discusses ethical issues, methodological limitations, self-efficacy, and cultural considerations.
* **3-4 marks:** Some critical thinking is present (e.g., noting that fear appeals have limits) but is superficial or lacks depth.
* **1-2 marks:** Little to no critical evaluation is evident.

**Criterion E: Clarity and organization (2 marks)**
* **2 marks:** The essay is well-structured, follows a logical flow, and uses appropriate psychological terminology throughout.
* **1 mark:** The essay has some structure but lacks cohesive flow or transition between paragraphs.