PSYC 2030 Chapter Notes - Chapter 10: Field Experiment
5 Jun 2018
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PSYC 2030 Chapter 10 Notes
Introduction
Characteristics Levels
• Before the experiment began, the experimenters observed each boy in their research
sample to measure his characteristic level of aggression.
• These initial assessments served as a baseline against which future increases in
aggression could be measured.
• The aselie oseratios suggested that the istitutio’s four ottages ould e diided
into two subgroups consisting of two cottages populated by relatively aggressive boys
and two cottages populated by less aggressive peers.
• Then the experiment began.
• For a period of one week, violent movies (such as Bonnie and Clyde and The Dirty
Dozen) were shown each evening to one of the two cottages in each subgroup and
eutral fils suh as Daddy’s Fiaée ad La Belle Aériaie ere sho to the other
cottages.
• Instances of physical and verbal aggression among residents of each cottage were
recorded twice daily (at lunchtime and in the evenings after the movie) during the
movie week and once daily (at lunchtime) during a post-treatment week.
• The most striking result of this field experiment was the significant increase in physical
aggression that occurred in the evenings among residents of both cottages assigned to
the violent-fi lm condition.
• Because the violent movies contained a large number of physically aggressive incidents,
it appears that they evoked similar responses from the boys who watched them.
• But as shown violent movies prompted larger increases in aggression among boys who
were already relatively high in aggression
• Exposure to the violent movies caused the highly aggressive boys to become more
verbally aggressive as well
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