My psyc 130 Class was given two images to view and were asked to decide which one they preferred. They then were asked to distribute money to two students, one who liked the same picture as them, the other who liked the other picture.  As seen in the following handout they were given various choices, non including an even split of 50 / 50.  Overwhelmingly they elected to give more money to their in-group member rather than the out-group member as seen below t = 4.361 alpha = 0.000

 

This gives strong support for Henry Tajfel’s social identity theory based upon this minimal group experiment.

 

Paired Samples Statistics

 

 Mean

N

Std.
Deviation

Std. Error Mean

 

Pair 1

INGROUP

60.27

37

16.41

2.70

 

 

OUTGROUP

38.38

37

14.63

2.40

 

Paired Samples Test

 

 

Paired Differences

 

 

 

t 

df

Sig.
  (2-tailed)

 

 

 

Mean

Std. Deviation

Std. Error Mean

95% Confidence Interval of the Difference

 

 

 

 

 

 

 

 

 

 

Lower

Upper

 

 

 

 

Pair 1

INGROUP - OUTGROUP

21.89

30.54

5.02

11.71

32.07

4.361

36

.000