Eating behaviour — AQA A-Level Psychology Revision

    This topic explores the biological and psychological factors influencing human eating behaviour, including food preferences, the physiological control of e

    Topic Synopsis

    This topic explores the biological and psychological factors influencing human eating behaviour, including food preferences, the physiological control of eating, and explanations for eating disorders such as anorexia nervosa and obesity.

    Key Concepts & Core Principles

    Exam Tips & Revision Strategies

    Examiner Marking Points

    Eating behaviour

    AQA
    A-Level

    This topic explores the biological and psychological factors influencing human eating behaviour, including food preferences, the physiological control of eating, and explanations for eating disorders such as anorexia nervosa and obesity.

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    Objectives
    3
    Exam Tips
    0
    Pitfalls
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    Key Terms
    8
    Mark Points

    Topic Overview

    Eating behaviour is a fascinating topic within AQA A-Level Psychology that explores the psychological, biological, and social factors influencing what, when, and how much we eat. It draws on evolutionary explanations, such as the role of food preferences in survival, and examines how modern environments can lead to maladaptive eating patterns. Understanding eating behaviour is crucial for explaining obesity, anorexia nervosa, and other eating disorders, and it links to broader themes in psychology like biological rhythms, learning, and social influence.

    This topic is divided into key areas: explanations for food preferences (including evolutionary, learning, and cognitive factors), neural and hormonal mechanisms controlling hunger and satiety (such as the role of the hypothalamus and ghrelin/leptin), and explanations for eating disorders like anorexia nervosa and obesity. Students will evaluate research methods used in this area, including twin studies and brain imaging, and consider the interaction between nature and nurture. Mastery of this topic requires understanding how different perspectives (biological, behavioural, cognitive) offer complementary explanations.

    Eating behaviour is particularly relevant today given rising rates of obesity and eating disorders. It allows students to apply psychological theory to real-world health issues, making it a highly engaging and practical part of the A-Level course. By studying this topic, students develop critical thinking skills as they evaluate competing explanations and consider the ethical implications of research into eating.

    Key Concepts

    Core ideas you must understand for this topic

    • →Evolutionary explanations for food preferences: innate taste preferences for sweet and fatty foods (energy-rich), neophobia (fear of new foods) as a protective mechanism, and the 'meat-sweet' theory.
    • →Neural and hormonal mechanisms: role of the lateral hypothalamus (LH) as a 'feeding centre' and ventromedial hypothalamus (VMH) as a 'satiety centre'; hormones like ghrelin (stimulates hunger) and leptin (reduces hunger).
    • →Learning explanations: classical conditioning (e.g., associating a flavour with illness leads to taste aversion), operant conditioning (e.g., eating comfort food as positive reinforcement), and social learning theory (modelling parents' or peers' eating habits).
    • →Anorexia nervosa: biological explanations (e.g., genetic vulnerability, serotonin imbalance), cognitive explanations (e.g., distorted body image, perfectionism), and sociocultural factors (e.g., media pressure for thinness).
    • →Obesity: biological explanations (e.g., genetic predisposition, leptin resistance), psychological explanations (e.g., restraint theory, disinhibition), and social explanations (e.g., food availability, cultural norms).

    What You Need to Demonstrate

    Key skills and knowledge for this topic

    • Evolutionary explanations for food preferences (neophobia, taste aversion)
    • Role of learning in food preference (social and cultural influences)
    • Neural and hormonal mechanisms (hypothalamus, ghrelin, leptin)
    • Biological explanations for anorexia nervosa (genetic, neural)
    • Psychological explanations for anorexia nervosa (family systems theory, social learning theory, cognitive theory)
    • Biological explanations for obesity (genetic, neural)
    • Psychological explanations for obesity (restraint theory, disinhibition, boundary model)
    • Explanations for the success and failure of dieting

    Marking Points

    Key points examiners look for in your answers

    • Evolutionary explanations for food preferences (neophobia, taste aversion)
    • Role of learning in food preference (social and cultural influences)
    • Neural and hormonal mechanisms (hypothalamus, ghrelin, leptin)
    • Biological explanations for anorexia nervosa (genetic, neural)
    • Psychological explanations for anorexia nervosa (family systems theory, social learning theory, cognitive theory)
    • Biological explanations for obesity (genetic, neural)
    • Psychological explanations for obesity (restraint theory, disinhibition, boundary model)
    • Explanations for the success and failure of dieting

    Examiner Tips

    Expert advice for maximising your marks

    • 💡Ensure clear distinction between biological and psychological explanations for each condition.
    • 💡Be prepared to evaluate the appropriateness and effectiveness of theories and treatments.
    • 💡Use specific terminology such as 'neophobia', 'enmeshment', and 'disinhibition' accurately.
    • 💡When evaluating explanations, always use the 'PEEL' structure (Point, Evidence, Explanation, Link) to ensure depth. For example, when discussing evolutionary explanations, cite cross-cultural studies showing universal sweet preferences, then explain how this supports the theory, and link back to the question.
    • 💡Be precise with terminology: distinguish between 'hunger' (biological need) and 'appetite' (psychological desire). Examiners reward accurate use of key terms like 'ghrelin', 'leptin', 'neophobia', and 'restraint theory'.
    • 💡For 16-mark essays, include a discussion of individual differences and real-world applications. For instance, when evaluating treatments for obesity, mention how CBT and bariatric surgery have different success rates depending on patient characteristics.

    Common Mistakes

    Pitfalls to avoid in your exam answers

    • Misconception: The hypothalamus is the only brain area controlling eating. Correction: While the hypothalamus is crucial, other areas like the amygdala (emotional responses to food) and prefrontal cortex (decision-making) also play significant roles.
    • Misconception: Anorexia nervosa is solely caused by media pressure. Correction: Media pressure is a contributing factor, but biological (e.g., genetics) and cognitive (e.g., perfectionism) factors are also important; it's a biopsychosocial disorder.
    • Misconception: Obesity is simply due to lack of willpower. Correction: Obesity has multiple causes including genetic predisposition, hormonal imbalances (e.g., leptin resistance), and environmental factors (e.g., food deserts); willpower is only one small part.

    Frequently Asked Questions

    Common questions students ask about this topic

    Before You Start

    Prior knowledge that will help with this topic

    • •Biopsychology: understanding of the nervous system, endocrine system, and brain structures (especially the hypothalamus) is essential for neural and hormonal mechanisms.
    • •Approaches in Psychology: familiarity with the biological, behavioural, cognitive, and social learning approaches helps evaluate different explanations for eating behaviour.
    • •Research Methods: knowledge of twin studies, correlations, and brain imaging techniques (e.g., fMRI) is needed to critically assess studies in this area.

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    Comprehensive revision notes & examples

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