Worked solution
AO1 Knowledge and Understanding Points: Biological explanations suggest aggression is driven by internal physiological systems. Brain structure explanations focus on the prefrontal cortex, which regulates executive functions and inhibits impulsive behaviour, and the amygdala, which processes emotional responses and triggers the fight-or-flight response. Hormonal explanations focus on testosterone, an androgen linked to dominance, competitive behaviour, and physical aggression. Learning theory explanations suggest aggression is acquired from the environment. Social Learning Theory (SLT) proposes that aggression is learned through the observation and imitation of aggressive role models. This involves cognitive meditational processes (attention, retention, reproduction, and motivation) and is facilitated by vicarious reinforcement. Operant conditioning explains aggression through direct reinforcement, where aggressive acts that are rewarded (positive reinforcement, such as obtaining a desired item) or that remove an undesirable stimulus (negative reinforcement, such as stopping a bully) are more likely to be repeated in the future. AO3 Analysis and Evaluation Points: Biological explanations are supported by objective, scientific evidence, such as Raine et al. (1997), who used PET scans to find lower metabolic activity in the prefrontal cortex of murderers pleading not guilty by reason of insanity (NGRI). However, biological theories can be criticized for being reductionist, as they simplify complex interpersonal social behaviours down to neurotransmitters, hormones, or brain localized functions, ignoring environmental contexts. Additionally, correlation does not equal causation; high testosterone levels could be a consequence of aggressive interactions rather than the cause. Learning theories are supported by controlled laboratory experiments, such as Bandura, Ross, and Ross (1961), who demonstrated that children exposed to an aggressive adult model imitated precise physical and verbal aggressive behaviours. However, these laboratory studies can be criticized for lacking ecological validity, as the Bobo doll is designed to be hit and children may have displayed demand characteristics. Furthermore, learning theories are nurture-focused and ignore biological predispositions, such as individual differences in temperament or genetic factors (e.g., the MAOA gene). An interactionist approach, such as the diathesis-stress model, provides a more comprehensive explanation, suggesting that biological factors establish a physiological predisposition to aggression, which is then triggered or modified by environmental learning experiences and social reinforcement.
Marking scheme
Levels-Based Marking Scheme (16 Marks Total: 8 Marks AO1, 8 Marks AO3). Level 1 (1-4 marks): Demonstrates isolated elements of knowledge and understanding of biological or learning theory explanations. Evaluation is sparse, generic, or absent. No clear structure. Level 2 (5-8 marks): Demonstrates some accurate knowledge and understanding of both explanations, but may be unbalanced. Evaluation is present but limited, with simplistic comparisons and minor inaccuracies. Level 3 (9-12 marks): Demonstrates good knowledge and understanding of both biological and learning theory explanations of aggression. Evaluation is developed, structured, and includes relevant research evidence (e.g., Raine, Bandura). Shows some awareness of the nature-nurture debate. Level 4 (13-16 marks): Demonstrates detailed, accurate, and comprehensive knowledge of both approaches. Evaluation is highly analytical, balanced, and sophisticated, clearly comparing nature (biology) vs nurture (learning) and offering a logical, well-supported conclusion that integrates both perspectives (such as an interactionist view).