Social Psychology Lecture 5.docx

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13 Apr 2012
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Social Psych Lecture 5
Group cohesiveness: degree to which the group members are or perceived to be
close
>in the mind of the group members: more cohesive it is the more liking you have
for them just bc they are a member
>in the mind of outsiders: the more cohesive a group is perceived to be, the more
we stereotype them and think they’re all the same
-social facilitation: tendency for performance to be improved when doing well
learned task in the presence of others
>but sometimes the presence of others, when the task is not well practiced
-social loafing: tendency for people to slack off when there’s a group of people
contributing to the behave
>if you cannot be individually evaluated you perform worse on simple tasks and
better on complex one
-Evaluation apprehension: predicts loafing vs facilitation. Concern about being
evaluated. Your imagination of how you’re going to be evaluated and how imp it is
to be evaluated
>socio evaluative threat: extreme evaluation apprehension. They know theyre
going to be evaluated and its too much for them to handle. Body responds with
stress hormone cortisol (constricts blood vessels in hippocampus, affects learning
and memory)
-Three main components that predict behave when other people are around. Starts
with presence of others, either you can be indvid evaluated (evaluation
apprehension) OR you cant be individual evaluated (don’t feel evaluation
apprehension. This leads into arousal or not. If you’re feeling aroused bc you can be
individual evaluated but the task is simple, you perform well. If youre all relaxed bc
youre not being individ evaluated, in a simple task you see impaired performance in
the presence of others, people slack off. (**4th page, 4th slide)
-group polarization: tendency to groups to make more extreme decision then any of
its indiv group members would have made on their own
>can be shift towards greater risk or greater caution.
-group think: extreme group polarization. Challenge disaster example: first civilian
going into space. As everyone’s watching it go up, it exploded. People found out it
was an extremely avoidable disaster. Day before launch tried to warn the higher ups
that it wasn’t safe, but there was a lot of suppression of that information.
-Jury decision-making: group decision-making situation. 97% of juries end with the
decision favored by the majority of the initial vote (pre deliberation errors). There’s
an initial vote after the evidence is all out, and those get read out. Jury ends up going
with what the majority vote was.
-Cascade effect: whoever happens to be first says, “I voted _____” and that first person
has greater influence. And like, the 12th person doesn’t even matter what their initial
vote was
-Unanimous decision: forces people to be cohesive and that amplifies group think.
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