MetadataPastPaper.sampleTitle

Participants were asked to refrain from drinking alcohol and beverages containing caffeine (such as coffee, tea, or cola) on the day of the experiment to ensure their normal sleep cycles were not disrupted.

1 mark for identifying alcohol. 1 mark for identifying caffeine / caffeinated drinks.

The results showed that participants were highly accurate at estimating their dream duration. For the 5-minute REM sleep awakenings, participants chose the correct option 45 times (out of 51 trials). For the 15-minute REM sleep awakenings, they correctly chose 15 minutes 47 times (out of 60 trials).

1 mark for stating that participants were generally accurate/successful in estimating dream duration (5 or 15 minutes). 1 mark for providing quantitative support (e.g., 45/51 correct for 5 mins, or 47/60 correct for 15 mins, or overall high percentage of correct choices).

The vertical eye movements corresponded directly to vertical imagery in the dream. For example, a participant reported dreaming of standing at the bottom of a cliff, looking up at people climbing, and then down at the ground. Another dreamt of climbing up a series of ladders, looking up and down as they climbed. A third dreamt of shooting basketballs, looking up at the basket and then down to the floor to retrieve the ball.

1 mark for a partial or vague description of a vertical dream (e.g., 'climbing a ladder'). 2 marks for a detailed, clear description of the vertical imagery (e.g., 'climbing a series of ladders and looking up and down as they climbed' OR 'standing at the bottom of a cliff looking up at climbers and down at the ground').

During the trunk-wash training, elephants had to learn several specific tasks. These included: presenting the trunk (command: 'trunk here'), lifting the trunk (command: 'lift'), holding the trunk still (command: 'hold'), placing the trunk in a bucket of water (command: 'bucket'), and blowing the water out of the trunk (command: 'blow').

1 mark for each correct target behaviour/command identified, up to a maximum of 2 marks. Acceptable behaviours: presenting trunk ('trunk here'), lifting trunk ('lift'), holding still ('hold'), inserting trunk in bucket ('bucket'), blowing ('blow').

The secondary reinforcer used by the trainers was a high-pitched whistle blow. To establish this sound as a secondary reinforcer, the trainers paired it with a primary reinforcer (food treats, such as bananas or sugarcane). The whistle blow was sounded at the exact moment the correct behaviour was performed, immediately followed by the delivery of food, until the sound itself signaled success to the elephant.

1 mark for identifying the secondary reinforcer (whistle / high-pitched whistle blow / sound). 1 mark for outlining how it was established (paired with a primary reinforcer / food / treats / banana / sugarcane).

The study concluded that positive reinforcement training (PRT) is a highly effective and safe method for training juvenile Asian elephants to cooperate with veterinary procedures like trunk washing. It demonstrated that captive elephants can be managed humanely and taught complex husbandry tasks without relying on traditional, forceful, or negative reinforcement techniques.

1 mark for a basic conclusion (e.g., elephants can be trained using positive reinforcement/rewards). 2 marks for a detailed, complete conclusion that links to the target behaviour or the humane/safe implications of the study (e.g., positive reinforcement training is an effective, non-forceful method to train juvenile elephants to voluntarily participate in trunk washing, improving elephant welfare and handler safety).

In a target-present line-up, the actual person who committed the mock crime (the target/culprit) is present in the line-up alongside three similar-looking distractors (foils). In a target-absent line-up, the actual culprit is not in the line-up; instead, they are replaced by a fourth foil, meaning all individuals in the line-up are innocent distractors.

1 mark for describing the target-present line-up (the culprit/target is included with foils). 1 mark for describing the target-absent line-up (the culprit/target is not included, replaced by an innocent foil / only foils are present).

When presented with a target-absent line-up, children performed significantly worse than adults. Specifically, children had a much lower correct rejection rate than adults (they struggled to say that the culprit was not in the line-up) and instead made significantly more false identifications by choosing one of the innocent foils.

1 mark for a simple comparison (e.g., adults were better at target-absent line-ups than children). 2 marks for a precise outline of the finding (e.g., in target-absent line-ups, children made significantly more false identifications / had a lower correct rejection rate than adults, showing they felt more pressure to choose someone).

In Dement and Kleitman's study, researchers collected multiple types of data.

1. Quantitative measures included:
- The participant's estimate of whether they had been dreaming for 5 or 15 minutes (forced-choice).
- The word count of the dream narrative.
- EEG recordings of eye movement patterns.

2. Qualitative measures included:
- The detailed verbal description of the dream content when woken up.

1 mark for a correct quantitative measure.
1 mark for a correct qualitative measure.

Acceptable quantitative measures:
- Estimating dream duration (5 or 15 minutes).
- Word count of dream descriptions.
- EEG/EOG patterns (e.g., counting eye movements).

Acceptable qualitative measures:
- The verbal description/content of the dream narrative.

In the study by Fagen et al., the juvenile elephants were trained using positive reinforcement (operant conditioning) to perform specific behaviors necessary for veterinary care. The trained target behaviors included:

- 'Foot' (presenting a foot for inspection/treatment)
- 'Steady' (remaining still/holding a position)
- 'Trunk up' (raising the trunk)
- 'Come' (approaching the trainer)
- 'No' (stopping a behavior)

Identifying any two of these commands/behaviors earns full marks.

1 mark for each correct target behavior identified, up to a maximum of 2 marks.

Acceptable answers include:
- Foot (presentation / lifting foot)
- Steady (remaining still)
- Trunk up
- Come (approaching)
- Side (turning side-on)

Reject general behaviors not specified in the training protocol.

In the study by Pozzulo et al., participants (both children and adults) were exposed to two types of line-up conditions:

1. Target-present line-up: The actual culprit (the target) from the video clip was included in the photos.
2. Target-absent line-up: The actual culprit was not included, and was replaced by a lookalike/foil.

1 mark for identifying the 'target-present' line-up condition.
1 mark for identifying the 'target-absent' line-up condition.

To ensure that external chemical stimulants or depressants did not affect EEG readings or sleep cycles, participants were instructed to avoid drinking alcohol and drinks containing caffeine (e.g., coffee, tea, cola) on the day of the study.

1 mark for each correct substance identified, up to a maximum of 2 marks.

Acceptable answers:
- Caffeine (accept coffee, tea, cola)
- Alcohol (accept wine, beer, spirits)

Reject: 'drugs' (too vague), 'food' (they ate normally).

Part (a): Eye movements were recorded using an electrooculogram (EOG) with electrodes attached near the eyes. These movements were categorized into four distinct patterns: mainly vertical, mainly horizontal, both vertical and horizontal, and very little or no movement. Part (b): To prevent researcher bias/demand characteristics, Dr. Aris can use a tape recorder for participants to describe their dreams before any contact with the experimenter, or ensure the experimenter who speaks to the participant does not know which eye-movement pattern has occurred prior to waking.

Part (a): 1 mark for identifying the equipment (EOG/electrodes near eyes). 1 mark for describing the categorization (e.g., vertical, horizontal, mixed, inactive). Part (b): 1 mark for identifying a control (e.g., using a tape recorder, experimenter blind to condition). 1 mark for explaining how this prevents bias/influence on dream reporting.

Part (a): Shaping involves reinforcing successive approximations of the desired behavior. In Fagen et al., the complex target task (such as foot presentation) was broken down into smaller, sequential steps (e.g., first touching the target stick with the foot, then raising the foot off the ground, then holding it up). The elephant was rewarded with food/reinforcement only when it successfully completed each progressive step, gradually guiding it to perform the full target behavior. Part (b): Two secondary reinforcers used in the study were a high-pitched whistle blow (used as a bridge/conditioned reinforcer) and verbal praise (such as saying 'good').

Part (a): 1 mark for defining shaping/successive approximations. 1 mark for applying it to the elephant training steps. 1 mark for referencing how rewards were progressively given as behavior neared the target. Part (b): 1 mark for each secondary reinforcer identified (up to 2 marks). Acceptable: whistle/blow of whistle, verbal praise ('good', etc.). Do not accept primary reinforcers like food.

Part (a): In the target-absent condition, children were significantly more likely than adults to make a false identification (choosing an innocent foil). Adults were significantly more successful at correctly rejecting the line-up (identifying that the target was not present) compared to children. Part (b): The investigator should present all potential faces/photographs at the same time (simultaneously). Crucially, they must instruct the children that the culprit 'may or may not be in the line-up' and emphasize that it is acceptable to say 'not there', reducing the social pressure on children to make a choice.

Part (a): 1 mark for identifying that children made more false identifications/errors. 1 mark for identifying that adults were better at correct rejections/identifying target absence. Part (b): 1 mark for describing the simultaneous presentation (all photos/foils shown together). 1 mark for describing the specific instruction ('may or may not be there' / 'not there' is a valid option).

To achieve full marks, a candidate must evaluate both ecological validity and ethics, explicitly comparing Fagen et al. with either Bandura et al. or Saavedra and Silverman.

**Example Essay Outline comparing Fagen et al. with Bandura et al.:**

* **Ecological Validity:**
* **Fagen et al.:** The study was conducted in a naturalistic camp environment in Chitwan National Park, Nepal. The elephants were tested in their familiar housing, and the target behaviors (e.g., foot presentation) are actual husbandry behaviors needed for veterinary care, giving the study high ecological validity. However, the structured clicker training sessions and specific target-directed behaviors were somewhat artificial.
* **Bandura et al.:** In contrast, Bandura et al. took place in a highly controlled, artificial laboratory setting at Stanford University. Children observed a model behaving aggressively toward a Bobo doll (a toy designed to be hit) and were then placed in a sequence of experimental rooms. This does not reflect real-world social interaction or domestic settings, resulting in low ecological validity (mundane realism).
* **Comparison:** Fagen et al.'s study boasts higher ecological validity because the setting and tasks were integrated into the elephants' daily care routine, whereas Bandura et al.'s experimental setup was artificial and unrepresentative of daily life.

* **Ethics:**
* **Fagen et al.:** The researchers strictly followed ethical guidelines for animal research. The training relied entirely on positive reinforcement (chopped bananas), with no food deprivation or physical punishment used. The elephants could walk away from training sessions at any time, demonstrating a high level of concern for animal welfare.
* **Bandura et al.:** This study raises significant ethical concerns. Young children were exposed to violent models, which could have led to long-term behavioral changes (aggressive habits). Additionally, researchers deliberately frustrated the children by telling them the best toys were reserved for other kids. There is also limited evidence of active parental consent or follow-up counseling.
* **Comparison:** Fagen et al. placed a strong emphasis on the welfare and autonomy of their animal participants, whereas Bandura et al. deliberately induced negative emotional states (frustration) and potentially long-lasting harmful behaviors in vulnerable human participants.

**Level 4 (7-8 marks):**
- Evaluation is detailed and balanced, covering both ecological validity and ethics.
- The comparison between Fagen et al. and the chosen study (Bandura or Saavedra) is explicit, direct, and well-developed.
- High-quality, accurate psychological terminology is used throughout.

**Level 3 (5-6 marks):**
- Good evaluation is present, but may be slightly unbalanced (e.g., more detail on ethics than ecological validity, or vice-versa).
- Comparison between the two studies is clear, though one study may be described in more detail than the other.
- Psychological terminology is mostly accurate.

**Level 2 (3-4 marks):**
- Limited evaluation. The candidate may focus almost entirely on one study without making explicit comparisons, or may evaluate only one of the required aspects (either ecological validity or ethics).
- There is some use of terminology, but the essay lacks depth.

**Level 1 (1-2 marks):**
- Superficial, brief points. Minimal or no clear comparison.
- Poor use of psychological terms, demonstrating limited understanding of the core studies.

**0 marks:**
- No creditworthy response.

An excellent response should evaluate the study by Dement and Kleitman (sleep and dreams) systematically, integrating two strengths and two weaknesses, with a clear focus on the named issue (ecological validity).

**Introduction**
Dement and Kleitman (1957) investigated the relationship between rapid eye movements (REM) and dreaming using a laboratory experiment. While the study established a pioneering biological basis for dreaming, it presents several methodological strengths and weaknesses.

**Strength 1: High Level of Control (Internal Validity)**
One major strength of the study is its highly standardized laboratory environment. The researchers controlled for potential extraneous variables that could affect sleep patterns and dreaming, such as demanding that participants avoid alcohol and caffeine on the day of the study. Additionally, the waking procedure was strictly standardized: participants were woken up by a loud doorbell and immediately spoke into a tape recorder. This high level of control ensures that the differences in dream recall were directly related to the sleep stage (REM vs. NREM) rather than external factors, increasing internal validity.

**Strength 2: Objective Scientific Measurements (Reliability)**
Another strength is the use of physiological measurement tools, specifically the Electroencephalograph (EEG) and Electrooculograph (EOG). These instruments provided highly objective, quantitative data about brain wave activity and eye movement patterns. Because these measurements are biological and not subject to researcher bias or participant interpretation, they increase the reliability of the findings and allowed the researchers to definitively identify when participants entered REM sleep.

**Weakness 1: Ecological Validity (Named Issue)**
Conversely, a major weakness of the study is its low ecological validity. Sleeping in a controlled laboratory setting with electrodes glued to the scalp and face is highly artificial and does not reflect how people sleep in their own beds. This artificial environment, combined with the stress of being constantly monitored and woken up at multiple points during the night by a loud doorbell, could easily disrupt natural sleep cycles and potentially alter the frequency, duration, or content of dreams. Therefore, the findings may not generalize well to everyday, natural sleep settings.

**Weakness 2: Small and Unrepresentative Sample (Generalizability)**
A second weakness is the study's small sample size. Only nine participants were studied in total (seven males and two females), and detailed data was only gathered from five of them. This extremely small and predominantly male sample makes it difficult to generalize the findings to the wider population, as sleep architectures and dreaming patterns might vary across a more diverse demographic (e.g., differences in age, gender, or lifestyle).

**Marking Guidelines (10 Marks Total):**

* **Level 4 (8-10 marks):**
- Evaluation is comprehensive and shows a deep understanding of the study.
- The response discusses two clear strengths and two clear weaknesses, including the named issue (ecological validity).
- The evaluation is balanced, well-structured, and explicitly linked to the study by Dement and Kleitman.
- Professional psychological terminology is used effectively throughout.

* **Level 3 (5-7 marks):**
- The evaluation is reasonable but may lack detail or balance.
- Includes strengths and weaknesses, and addresses the named issue (ecological validity).
- Some arguments may be general and not fully applied to the specific context of the study.

* **Level 2 (3-4 marks):**
- Limited evaluation.
- The response may only focus on strengths or only on weaknesses.
- The named issue (ecological validity) may be omitted, or the points are merely listed without elaboration.

* **Level 1 (1-2 marks):**
- Superficial or extremely brief response.
- The candidate may identify basic strengths or weaknesses but fails to evaluate them in relation to the study.