Re-tell Lecture — Social Psychology

Read the lecture ONCE, then re-tell it in your own words in 40 seconds without looking back. Social conformity: the Asch experiment In the nineteen fifties, psychologist Solomon Asch conducted a series of experiments to study conformity. Participants were asked to match the length of a line to one of three comparison lines — a task so simple that errors were virtually zero when people answered alone. However, Asch placed each participant in a group of confederates who deliberately gave the same wrong answer. Under this social pressure, about seventy-five per cent of participants conformed at least once, giving an obviously incorrect answer to match the group. When interviewed afterward, some said they genuinely doubted their own perception, while others admitted they knew the answer was wrong but did not want to stand out. The experiment reveals how powerful the desire to belong is: even in a trivial, unambiguous situation, most people will abandon their own correct judgement rather than disagree with a unanimous group.

Read the lecture ONCE, then re-tell it in your own words in 40 seconds without looking back. The power of first impressions Research in social psychology consistently shows that first impressions are formed within milliseconds and are remarkably resistant to change. When meeting someone for the first time, people make rapid judgements about trustworthiness, competence, and likability based on facial features, body language, and tone of voice before a single word of substance has been exchanged. These snap judgements activate the amygdala, a brain region associated with emotional processing, and they influence all subsequent interactions. The halo effect amplifies this: a positive first impression makes people interpret later behaviour more favourably, while a negative impression does the opposite. In job interviews, studies show that interviewers often make a hiring decision within the first four minutes and spend the remaining time seeking evidence to confirm that initial judgement. Understanding this bias has practical implications: while we cannot prevent snap judgements, we can train ourselves to pause and deliberately reassess before making important decisions about other people.

Read the lecture ONCE, then re-tell it in your own words in 40 seconds without looking back. Why people help strangers Altruistic behaviour — helping others at a cost to oneself — has puzzled evolutionary biologists because it seems to contradict the principle of survival of the fittest. Several theories explain why it persists. Kin selection suggests people are more likely to help relatives because doing so increases the survival of shared genes. Reciprocal altruism explains helping among non-relatives: I help you today, and you help me tomorrow. But neither fully accounts for anonymous donations to distant strangers one will never meet. Some psychologists argue that empathy is the key: witnessing another person's distress triggers an emotional response that motivates action regardless of any expected return. Brain imaging studies support this, showing that altruistic acts activate the same reward centres in the brain as receiving a gift. This suggests that helping others is not merely a social obligation but a source of genuine psychological reward, which may explain why it evolved and persists across cultures.