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					Beauty is but skin deep
 Attractiveness and cooperation
             in social exchange.




            Chisato Takahashi

                           1
How physical attractiveness affects
behavior in social exchange ?
 Previous studies
   Physical attractiveness collects premium in labor
   and marriage markets (e.g. Elder, 1976;
   Hamermesh & Biddle, 1994; Taylor & Glenn, 1976).
   In the domain of social exchange, Mulford, Orbell,
   Shatto and Stockard (1998) found that participants
   who played the prisoner’s dilemma game (PD)
   were more likely to enter a game with and
   cooperate with others they found physically more
   attractive.

       Attractive people are advantageous
                in social exchange
                                                   2
How physical attractiveness affects
behavior in social exchange ?

In our study,
  we investigate how physical
  attractiveness affects subjects’
  behavior in three different
  experimental games (Dictator
  game, PD, SD).


                                      3
Experiment 1
               Please rate the
               “Physical
               attractiveness”
               of this person.
                123456789
               not                       very
               attractive           attractive

               Photographed people have
               already participated in the
               game.
                                    4
Result 1

 Cooperators’ faces were rated more
 attractive than defectors’ faces.

 This relationship was observed only
 among male players regardless of raters’
 sex.



                                      5
Experiment 2

  Why the less cooperative males
  are rated more attractive?
  Do they have any traits that
  attract raters?

 We created an “averaged” face of
 cooperators and another averaged face of
 defectors in the SD game for each sex of the
 players .
                                          6
Averaged faces
  Cooperators’ face        Defectors’ face




Please judge which person is more attractive.
                                             7
Result 2
 Majority of the raters judged the male
 defectors’ averaged photograph more
 attractive than male cooperators’
 average photograph.


 Our findings indicate attractive men
 were less cooperative whereas
 physical attractiveness was unrelated
 to cooperation among women.
                                     8
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