Complete Guide to GCSE AQA Psychology Paper 2 Key Studies

Asch's Conformity Study

Ever wondered why you might agree with your mates even when you know they're wrong? Asch's famous experiment shows exactly how group pressure works in real life.

Asch tested 123 American male students by placing each one with 6-8 actors pretending to be participants. They had to match line lengths on cards - a task with an obviously correct answer. The actors deliberately gave wrong answers on 12 out of 18 trials to see if the real participant would conform.

The results were striking: participants gave wrong answers 36.8% of the time when surrounded by incorrect group responses. However, 25% never conformed at all, showing that people can resist social pressure.

Key Insight: Even when the answer is crystal clear, over a third of people will go along with the group to avoid standing out.

The study has limitations though - it was conducted in 1950s America during a highly conformist era, and judging line lengths with strangers isn't exactly like real-life peer pressure situations. Still, it demonstrates how social influence can override our own judgement.

Milgram's Obedience Study

Milgram's shocking experiment reveals just how far ordinary people will go when an authority figure tells them to do something terrible. This study fundamentally changed how we understand obedience and moral responsibility.

Participants thought they were testing memory by giving electric shocks to a learner (actually an actor) whenever they got answers wrong. The shocks supposedly increased from 15 volts to a dangerous 450 volts. When participants hesitated, the experimenter simply told them to continue.

The results were disturbing: 65% of participants delivered the full 450-volt shock, even though they believed it could be lethal. No one stopped before 300 volts, and many showed extreme stress - sweating, trembling, and even having seizures.

Milgram explained this through agency theory - when we see someone as an authority figure, we enter an "agentic state" where we believe they're responsible for our actions, not us. This explains everything from workplace behaviour to historical atrocities.

Reality Check: The same psychological processes that occurred in Milgram's lab help explain how ordinary people became involved in the Holocaust.

Adorno's Authoritarian Personality Theory

Not everyone obeys authority figures equally - some people seem naturally more submissive to power. Adorno believed this comes down to personality type, specifically what he called the "authoritarian personality."

People with this personality are extremely obedient to those above them in status whilst looking down on those they see as inferior. They tend to think in black and white terms with no grey areas. Adorno linked this to harsh, critical parenting during childhood.

He developed the F-scale questionnaire to measure authoritarian tendencies. However, this research has serious flaws - the questions were biased so that agreeing always indicated authoritarianism.

Critical Point: Adorno only found correlation, not causation - harsh parenting and obedience might be linked, but one doesn't necessarily cause the other.

The theory also ignores other factors like education level, which research shows affects obedience. Some of Milgram's most obedient participants didn't have authoritarian upbringings, suggesting personality alone can't explain why people follow orders.

Piliavin's Subway Study

Would you help a stranger who collapsed on the tube? Piliavin's clever field experiment shows that our decision to help depends heavily on how we perceive the person in need.

Researchers had actors collapse on New York subway trains, sometimes appearing drunk and other times sober with a walking stick. Hidden observers recorded how quickly and often passengers offered help.

The results were eye-opening: the "ill" person with a walking stick was helped within 70 seconds in 95% of cases. The "drunk" person only received help 50% of the time. This shows that helping behaviour is strongly influenced by whether we think someone "deserves" assistance.

Real-World Application: This explains why some charity campaigns are more successful than others - people respond differently based on how they perceive the victims.

The study has excellent ecological validity because it happened in a natural setting with real people going about their daily lives. However, it raises ethical concerns since participants couldn't give consent or receive debriefing. The results might not apply to different cultures or smaller communities either.

Piaget's Theory: Language Depends on Thought

Piaget believed we need to understand the world before we can talk about it. His theory suggests that thought comes first, then language follows to express what we already know.

According to Piaget, children develop schemas (mental structures containing knowledge about the world) through experience. Only after forming these mental frameworks can they learn appropriate words to describe them. Without the underlying understanding, children are just repeating words like parrots.

This explains why children don't start speaking until near the end of their first year - they're busy developing schemas during the sensorimotor stage by coordinating their senses and movements.

However, this theory faces serious challenges. The Sapir-Whorf hypothesis argues the complete opposite - that language shapes thought rather than the other way around. Cross-cultural studies support this alternative view.

The Problem: We can't actually measure schemas scientifically, so there's no solid proof they exist or develop before language.

The Sapir-Whorf Hypothesis: Thinking Depends on Language

What if the words available to you actually limit what you can think about? The Sapir-Whorf hypothesis suggests that language determines thought, not the other way around.

The strong version claims that without words for a concept, you literally cannot think about it. The famous example is that Inuit languages have 27 different words for snow, supposedly allowing speakers to perceive snow differently than English speakers.

The weak version is more moderate - language influences but doesn't completely control thought. Having specific words makes certain ideas easier to think about, remember, and distinguish between.

Modern Relevance: This explains why learning new vocabulary in any subject - from psychology to cooking - actually changes how you think about those topics.

However, the theory has problems. The "Eskimo words for snow" example turned out to be largely false - they don't actually have significantly more snow words than English. Also, successful translation between languages suggests meaning can survive without specific words.

Cross-cultural studies do show that language influences memory and perception, supporting at least the weak version of this hypothesis.

Von Frisch's Bee Study

Bees have their own language, and Von Frisch cracked the code. His groundbreaking research revealed that these tiny insects use sophisticated dance communication to share vital information about food sources.

Using a glass hive for observation, Von Frisch marked individual bees with paint dots and watched what happened when they returned from feeding. He discovered two distinct dance patterns depending on distance to food.

For food sources within 100 metres, bees performed a round dance - turning rapidly in circles left and right. For distant food, they did a waggle dance - moving straight whilst wagging their abdomen, then circling left and right. Amazingly, 60% of watching bees successfully found food at the indicated distance.

The study has impressive ecological validity - when researchers replaced artificial sugar containers with flowers, bees behaved identically. Replication studies using wooden hives and video cameras confirmed the original findings.

Fascinating Fact: Recent research suggests bee communication is even more complex, involving sounds during dancing and possibly cognitive maps based on landmarks.

Darwin's Evolutionary Theory of Non-Verbal Communication

Why do we bare our teeth when angry or gasp when frightened? Darwin argued that non-verbal communication evolved to help our ancestors survive and reproduce.

His theory explains facial expressions and body language through natural selection. Behaviours that improved survival chances were passed down genetically. For example, showing teeth during anger originally prepared humans for biting in self-defence - a clear "back off" signal.

Darwin also identified nervous system responses that aid survival. Dilated pupils when frightened increase visual input, whilst an open mouth allows more oxygen intake during the fight or flight response.

Strong evidence supports genetic influence on non-verbal behaviour. The same facial expressions for basic emotions appear across all cultures, suggesting they're innate rather than learned. Babies are born with crying and laughing abilities, and even people born blind display typical emotional expressions.

Nature vs Nurture: While basic expressions seem genetic, we also learn to control and modify them through social experience.

However, social learning theory challenges pure evolutionary explanations. Yuki's research on cultural differences in interpreting emotions shows that some non-verbal communication is definitely learned through observation and copying.

Yuki's Study of Emoticons

Do Japanese and American people literally see emotions differently? Yuki's fascinating research suggests that culture shapes how we interpret facial expressions, challenging purely biological explanations of non-verbal communication.

The study compared 95 Japanese students with 118 American students, showing them six emoticons with different combinations of happy, neutral, and sad eyes and mouths. Participants rated each emoticon's happiness on a 9-point scale.

Results revealed striking cultural differences: Japanese participants focused primarily on eyes when judging emotions, whilst Americans paid more attention to mouths. This was especially clear when eyes and mouth showed conflicting emotions.

These findings support the idea that emotional interpretation is learned through cultural norms rather than being purely instinctive. However, the study has limitations - emoticons aren't real faces, reducing ecological validity.

Cultural Insight: This explains why emoji designs sometimes get "lost in translation" between different cultures!

Importantly, when Yuki repeated the study using photographs of real people, the same cultural differences appeared. This strengthens the evidence that our cultural background genuinely shapes how we read emotions, though using rating scales might oversimplify the complex process of emotional interpretation.

James-Lange Theory of Emotion

Ever wondered whether you feel scared because your heart pounds, or whether your heart pounds because you feel scared? The James-Lange theory argues it's the first option - physical reactions create emotions, not the other way around.

The sequence works like this: EVENT → AROUSAL → INTERPRETATION → EMOTION. When something triggers your sympathetic nervous system, you experience physical changes like increased heart rate and muscle tension. Your brain then interprets these bodily sensations and labels them as specific emotions.

Imagine encountering a bear in the forest. Your muscles would tense and heart would race first. Only after noticing these physiological changes would your brain interpret them as fear. Without physical arousal, you'd feel no emotion at all.

This theory explains real-world phenomena like phobias and panic disorders, where physical symptoms often seem to trigger emotional responses. However, it's been challenged by other theories.

Think About It: If you gave a presentation with no physical nervousness - steady heart rate, no sweating - would you actually feel calm?

The Cannon-Bard theory argues we experience emotions and physical changes simultaneously, whilst Schachter-Singer's two-factor theory adds that social context helps us interpret what our arousal means. Evidence from people with paralysis who still experience emotions also challenges James-Lange's claims.