3.1 AS Level content - core studies

Mechanism examples: EEG patterns index real-time sleep function; hormones/evolution can generate predictions about sex-linked behaviour; MRI can measure structural change after experience. Operational measures must be connected to the construct and alternative explanations.

Background: sleep cycles through REM and NREM in an ultradian rhythm, but dreaming had relied on retrospective self-report. Aims: test whether dream recall differs after REM versus NREM awakening; whether estimated dream duration corresponds to 5 versus 15 minutes of REM; and whether eye-movement direction relates to dream content.

Opportunity sample: nine adults (seven men, two women). Five were studied intensively; four provided minimal confirmatory data. Participants arrived at/about usual bedtime, ate normally and avoided alcohol/caffeine that day.

EEG/eye recordings offered objective temporal markers that converged with immediate reports: dreaming is strongly associated with REM, duration estimates broadly reflect REM duration and some eye patterns reflect dream imagery. The results do not show that dreams never occur in NREM or that EEG reveals content directly.

Ethical/practical concerns include disrupted sleep, electrodes and privacy of intimate dream reports; consent, withdrawal, confidentiality and monitoring harm matter. Biological/reductionist strength comes from objective sleep markers, while the subjective report and laboratory context show why a fuller explanation needs cognitive and situational evidence.

Ethical applications include scheduling awakening near REM for dream research/recall, improving sleep/dream education and using objective sleep-stage monitoring in clinical assessment—without claiming to decode thoughts or diagnosing from this small sample alone.

Human sex differences in toy preference are often explained by socialisation or biology. Rhesus monkeys share relevant social/hormonal systems but have not received human toy-gender teaching. Hassett et al. tested whether male/female monkeys differed in interaction with wheeled ('masculine') and plush ('feminine') toys in a pattern paralleling children.

The socially housed matrilineal troop at the Yerkes Center contained 135 rhesus monkeys and had lived together for over 25 years. After exclusions (including infants not reliably coded and hormonally treated animals), the analysed sample was 34 monkeys: 11 males and 23 females, ranging from 3 months to over 13 years.

A marked male preference for wheeled objects and greater female variability resembles some human child findings, supporting a possible evolved/hormonal contribution to toy-related activity. Because hormones were not manipulated and monkeys have social/rank histories, results do not eliminate learning/socialisation or show that toys are biologically gendered.

Animal ethics should use replacement/species/number and minimise pain/distress. Here monkeys were captive-bred/socially housed, familiar with enclosure/keepers, had food/water/enrichment and were observed remotely; toys created low intrusion, though novel/broken toys and inability to consent require welfare monitoring and removal. Evaluate animal guidelines, not human informed-consent rules.

Nature–nurture and biological–social interaction are central. The nomothetic sex-category analysis finds group patterns but female variability/rank associations caution against deterministic individual prediction. Application to children's toy access should expand opportunities, not reinforce stereotypes.

Mindfulness trains non-judgemental present-moment attention; earlier cross-sectional work could not show whether meditators' brains changed through practice or differed beforehand. Hölzel et al. aimed to test whether an eight-week Mindfulness-Based Stress Reduction (MBSR) course changed regional brain grey-matter concentration/density, especially in regions linked with learning, memory and regulation.

Longitudinal quasi-experiment with independent MBSR and wait-list control groups and repeated pre/post measures. The final MBSR MRI sample was 16 meditation-naïve adults; a separate control group was scanned across a similar interval. MBSR recruits sought stress reduction and had criteria including age 25–55, physical/psychological health, no medication/recent substantial meditation, MRI safety and commitment to all eight classes/homework.

Participation in MBSR was associated with measurable regional structural brain change, supporting biological plasticity and interaction between environmental experience/practice and brain. It does not prove every component, benefit or psychological change was caused by meditation alone.

Consent, confidentiality of scans/self-reports, MRI screening/claustrophobia, withdrawal and fair treatment of controls matter. Ethical applications include offering evidence-informed MBSR in stress-management, school/work/clinical support with trained delivery and choice—not scanning people to claim diagnosis or promising guaranteed brain improvement.

The study supports biological explanation and localisation while directly illustrating nature–nurture interaction/plasticity. MRI is objective/reductionist; lived mindfulness, group context and self-report add holistic/subjective dimensions. Group averages are nomothetic and do not predict every individual's outcome.

Example chain: input (recording, eye photograph or witnessed face) → selective attention/encoding/interpretation/storage/retrieval → output (name/place recall, mental-state word or line-up choice). Operational definitions make the hidden process testable but can capture only part of it.

Cognitive research often uses controlled, standardised, quantitative tasks (reliable/causal comparison) but risks reductionism, low ecological/construct validity and cultural/language bias. Individual–situational, idiographic–nomothetic, development, application and ethics should be connected to the exact task/sample.

Attention selects/focuses limited cognitive resources; boredom/low arousal can prompt daydreaming, while a demanding second task can compete with processing. Andrade asked whether a simple, low-demand doodling task would maintain attention and improve monitored and incidental memory for a monotonous telephone message.

Opportunity sample of 40 paid general-population adults (18–55; 35 women, 5 men) from a research participant panel who had just completed an unrelated experiment and agreed to help for five more minutes. Independent groups: doodling versus control.

Structured doodling did not drain attention enough to impair the message and may have reduced daydreaming/maintained arousal, improving monitoring and incidental recall under boredom. The study tested shape shading during one dull auditory task—not every form of drawing, note-taking, learning or divided attention.

Low-risk participation still requires consent for added time, withdrawal, debriefing about unexpected memory testing and confidentiality. Ethical application: offer simple repetitive shading during dull listening and compare recall; do not require it for everyone or assume benefit in visually demanding/safety-critical tasks.

Theory of mind/social sensitivity is attributing mental states to self/others and using them to explain/predict behaviour. Earlier tests could show ceiling effects or weak discrimination in typical adults. The study revised the Reading the Mind in the Eyes Test and tested whether adults with AS/HFA scored lower than comparison groups, plus predicted sex differences and relationships with Autism Spectrum Quotient (AQ).

The revised test was more sensitive to individual/group differences in adult social cognition and supported a specific advanced theory-of-mind difficulty in AS/HFA. It does not show that autistic people lack empathy, cannot infer any mental states or can be diagnosed from eyes alone.

The paper supports informed consent/confidentiality and generally low physical risk, but anticipated poor performance, labels and unfamiliar mental-state words could cause psychological discomfort/stigma—especially for Group 1. Minimise harm, explain non-diagnostic interpretation and protect individual scores.

A false positive is selecting someone/foil when the target is absent while believing the choice is correct. Young children's errors may reflect weaker face memory (cognitive) or social demand from an adult/authority and the mere presentation of a line-up implying someone must be chosen. The study tested whether age/presence patterns remained when target familiarity was manipulated using well-known cartoons versus unfamiliar humans.

Participants included young children and adults. The young-child group was 59 (38 boys, 21 girls), aged 4–7 (mean about 5), from three private pre-kindergarten/kindergarten schools in Eastern Ontario and familiar with Dora/Diego. Adult volunteers came from an Eastern Ontario university pool. Targets were Dora, Diego and two unfamiliar humans, including a 22-year-old white female student brushing her hair.

Cartoon foils came from internet images judged similar to Dora/Diego by facial structure/hair. Three judges rated ten candidates per target; the four highest-similarity cartoon characters were used. Human foils were also matched to target appearance. Participants watched four target videos in random order on a laptop.

Young children can recognise familiar targets very accurately, but have difficulty rejecting a line-up when the target is absent. This pattern supports social demand—not faulty memory alone—as a cause of false-positive choosing. It does not mean every child error is social or that target-present-only line-ups are acceptable police practice.

Parental/guardian consent and demographic/cartoon form, low-threat familiar videos and confidentiality support ethics; children may still feel stress/pressure or limited withdrawal with an adult questioner, so assent, reassurance and stopping are needed. Application: explicitly state the culprit may be absent, use child-friendly non-authoritative interviewers, open/non-leading questions, avoid challenging a rejection and monitor distress.