Group and Social Influence on Behavior and Decision Making.
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Transcript of Group and Social Influence on Behavior and Decision Making.
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Group and Social Influence on Behavior and Decision Making
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Group Roles
“All the world’s a stage,
And all the men and women merely players;
They have their exits and their entrances
And one man in his time plays many parts”
Shakespeare
• Refers to a notion of public behaviour (rules, norms, expectations) that the person believes is appropriate for the sitation and his or her position in it
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Role Playing
Three Categories• Self oriented roles
– motivated mainly to fulfill personal needs; tend to be less productive
• Group-maintenance roles– Help members to work well together
• Task-facilitating roles– Help members solve the problem or make the decision
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Self-Oriented Group-Maintenance
Task Facilitating
Controlling Encouraging Initiating
Withdrawing Harmonising Information giving or seeking
Attention Seeking
Compromising Coordinating
Diverting Procedure setting
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Group Norms
• Shared attitudes, opinions, feelings, or actions that guide behaviour
1.) an agenda for acceptable behaviour2.) provide roles3.) group survival – suppress and reject
deviants4.) provide identification – gives group
cohesion
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Conformity
Occurs when individuals adopt the attitude or behaviour of others because of real or
imagined pressure to do so
+ Conforming to group norms allows groups to function effectively
- Conformity pressures can sometimes make us act against our better judgement
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Asch Studies – 1950sConducted conformity experiments on group
influence
• Groups of 7 (6 accomplices and one subject)
• Instructed his accomplices to answer incorrectly on 12 of the 18 trials
• Subjects conformed 35% of the time
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Asch’s Conformity Experiment
Key factors influencing conformity1. Group size
As groups grow larger conformity increases – to a point
– Conformity increased as group size went from 2 to 4 and peaked at 7
2. Group unanimity– Presence of one dissenter lowered conformity
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www.prisonexp.org
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Degradation Proceduresdeloused prisoners as they do in this Texas
prison photograph
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Zimbardo’s Prison Experiment
• Tendency to conform to the expected social roles for guards and prisoners
• Degree to which roles shape attitudes and behaviour
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Obedience: The Power of Authority
• Obedience:– Form of compliance that occurs when people
follow direct commands from someone in a position of authority
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Stanley Milgram’s Obedience Studies (1963)
• 65% (26/40) adminstered all 30 levels of shocks. Highest level was up to 450 volts, a shock of fatal intensity
• Subjects focused on approval of authority figure rather than the pain they inflicted on the victim
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Milgram’s Studies
• Obedience increased when:1.) authority figure was near the subjects
2.) when the victim was less visible and less audible to the subject
3.) when the experiment was conducted in a prestigious university
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Milgram’s Studies
Conclusion:
“our actions are determined less by the kind of people we are than by the kind of situation we are in”
• We don’t lose sense of morality but we start to focus on how well we are living up to the expectations of the authority figure
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Criticisms
• Subjects who agree to participate in a scientific experiment expect to obey orders– Milgram’s response: So do soldiers and
bureaucrats in the real world who are accused of terrible acts performed in obedience to authority
• Ethics– Milgram used extensive deception
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Social Influence on Behaviour
• Presence of others can influence our behaviour – even when not attempting to do so
- “choking under pressure” – because of elevated self-consciousness
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Bystander Effect
• Individuals are less likely to provide needed help when others are present than when they are alone
• Tendency to seek help declines as number of bystanders increased –– Occurs in ambiguous situations
– Diffusion of responsibility – expecting others to take responsibility
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Decision Making in Groups
Group Cohesiveness
• Refers to the strength of the bonds that link group members to one another and to the group itself+ communicate more and participate more- increases pressure to conform
Perceived threat increases group cohesiveness
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Groupthink
• When members of a cohesive group emphasise concurrence at the expense of critical thinking in arriving at a decision
• A deterioration of mental efficiency, reality testing and moral judgement that results from in-group pressure
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Examples of groupthink
• Bay of Pigs
• Escalation of the Vietnam War
• Space shuttle challenger
• Failure to prepare for the invasion of Pearl harbor
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Existing conditions that could lead to groupthink
• High cohesiveness
• Insulation of group
• Lack of methodical procedures
• Directive leadership
• High stress with low degree of hope for finding better solution
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Groupthink Symptoms
• Illusion of group invulnerability• Rationalisation/suppression of non-supporting data• Belief in inherent morality of group• Stereotyping of “out groups”• Pressure on deviants to conform• Illusion of unanimity• Self appointed mind guard
– Tries to shield group from information that contradicts the group’s view
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Groupthink Preventitive Steps
• Leader encourages expressions of doubt
• Leader accepts criticisms of own ideas
• High status members speak last
• Recommendations from duplicate group
• Divide into sub groups from time to time
• Invite objective outsiders
• Assign devils advocate role
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