Group Influence 2
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- Created on: 15-05-15 14:37
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- Group Influence 2
- Group Polarisation
- Group Polarisatiion in Schools
- Also called the 'Accentuation effect'.
- Over time, initial differences between groups of college students become accentuated
- Pascarella + Terenzini (1991)
- Group Polarisation in Communities
- People self segregate e.g. conservative places attract conservative people + become more conservative
- David + Brooks (2005)
- Communities become self echo chambers
- Politically speaking, this results in a more politically divided country
- People self segregate e.g. conservative places attract conservative people + become more conservative
- Explaining Group Polarisation
- Informationalnfluence
- Group discussion = pooling of ideas
- If ideas are out across that others had not previously thought of, others may shift their opinion
- Burnstein + Vonokur (1977)
- Normative Influence
- We are most persuaded by those in groups who we identify with
- Self-serving bias: We suggest writing the novel if the chance is 4/10 but think others would say 5/10 or 6/10.
- Therefore we voice opinions more strongly to prevent ostracism
- Myers (1978)
- Informationalnfluence
- Group discussions often strengthen a member's intial inclinations
- Moscovici + Zavalloni (1969)
- The belief that groups are more cautious than individuals was tested
- Ppts were presented with decision dilemmas + were asked to decide how much risk to take
- They did this for 12 items then 5-6 ppts would discuss to reach a final score that was usually lower than individual scores
- This is call the Risky Shift Phenomenon
- Stoner (1961)
- 140 secondary school ppts has their attitudes to President de Gaulle + America measured (via attitude survey)
- Moscovici + Zavalloni (1969)
- They were then split into 4 groups and told to reach a unanimous decision
- They then filled out the attitude survey again alone
- The group + individual decision after discussion was more extreme, in the direction they supported before
- Groups of prejudice + non-prejudice students were set up.
- Like-minded groups were asked for their responses before/after this
- Round two of discussions increased the gap between the groups
- Myers + Bishop (1970)
- Group Polarisatiion in Schools
- Group Think
- Symptoms
- Janis (1971)
- 1) An illusion of invulnerability
- 2) Unquestioned belief in group morality
- 3) Rationalisation
- 4) Stereotyped view of opponents
- 5) Conformity pressure
- 6) Self censorship
- 7) Illusion of unanimity
- 8) Mind guards
- Critique
- For It
- Directive leadership = poorer decisions made
- McCauley (1998)
- Groups prefer supporting info to challenging info
- Schulz-Hardt et al (2000)
- Directive leadership = poorer decisions made
- Against It
- Based on case studies, Janis could hand pick positive results
- Families voice disagreement all the time
- Packer (2009)
- For It
- Definition:
- The tendency of decision making groups to suppress dissent in the interest of group harmony
- Janis (1971)
- Groupthink can occur in amiable, isolated groups with a directive leader
- Symptoms
- Minority Influence
- Consistency
- A minority that is consistent to a certain opinion is more influential
- To reduce cognitive dissonance by repeatedly hearing something else, majority shift to the dark side
- 32 groups of ppts were shown 36 slides that were shades of blue
- 2 confeds were in each group, said all the slides were green, or 2/3 were green
- In condition 1, 8% agreed with the minority, 2.5% in condition 2
- Private responding increased agreeing with the minority
- Self-confidence
- The more confident a minority is, the more doubts are raised in the majority
- If people take the head seat of the table, they know they will win
- Nemeth + Wachtter (1974)
- The more confident a minority is, the more doubts are raised in the majority
- Defection from the Majority
- A defector is anyone who initially agrees with the majority but switches to minority viewpoint
- A defector is more persuasive than a consistent minority
- Levine (1989)
- Influence
- 108 undergrads were presented with a booklet against a son accused of killing his father + a summary of jury discussion
- Minority supported defendant. More students switched if they heard of other defectors
- Clark Et al (2001)
- "All of history is a record of the power of minorities" Ralph Emerson
- Consistency
- Group Polarisation
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