To find out what factors make two groups
develop hostile relationships and then to
see how this hostility can be reduced.
IV
The stage of the experiment: (1) ingroup
formation, (2) friction phase and (3)
integration phase
DV
Intergroup behaviour was measured by observing the
boys behaviour and friendship patterns and tape
recording their conversations
SAMPLE
24 participants (11-year-old boys) who were
selected by opportunity sampling.
METHOD
Repeated measures design
PROCEDURE
The boys arrived on separate buses and
settled into their cabins on two sites.
INGROUP FORMATION
Each group had tasks to accomplish (eg
a treasure hunt with a $10 prize).
During this time the boys gave their groups names and discovered the existence
of the other group; they immediately requested a baseball game against the
other group.
Rattlers and Eagles
FRICTION PHASE
Tournament between two groups,
such as tug of war, for prizes such as
trophy
INTEGRATION PHASE
The boys were encouraged to work together by tasks,
such as fixing a blocked water pipe,
RESULT
Sherif found that the boys required little
encouragement to be competitive.
As soon as they found out about another group in the park, they resorted
to “us-and-them” language
FRICTION PHASE
Name calling started immediately
The Eagles burned the Rattlers’ flag and the Rattlers
retaliated by doing the same.
When the Eagles won the tournament, the Rattlers stole their prizes
INTEGRATION PHASE
Initially there was food fights
However, each shared task led to reduced hostility. By the
end, the Rattlers shared $5 they had won to buy soft drinks
for everyone.
CONCLUSION
Sherif regards the study as proving his hypotheses about
intergroup behaviour
Although intergroup conflict is inevitable when competition is
present, it can be reduced.
EVALUATION
GENERALISABILITY
Only boys were used, so the results
may not generalise the girls or mixed
sex groups.
The boys were supposed to be “all American” types:
white, bright and sporty. This isn't representative of
the american population
RELIABILITY
The observers were only with the boys for 12 hours a day and
could not see or overhear everything that went on. Which
decreases reliability
APPLICATION
The study shows how competition and frustration creates hostility
towards outgroups. In society, this suggests that discrimination and
violence could be reduced if jobs, housing, education and other
opportunities were shared more fairly between different groups
VALIDITY
The study has ecological validity, because these were real
boys at a real summer camp, doing real activities.
ETHICS
The boys did not give valid consent to be in this study and do
not seem to have been debriefed afterwards – they never
realised they were being experimented on.