The effects of similarity in self-defining dimensions and relative performance on friendship choice and intimacy

ジコ テイギ ノ ルイジセイ ト ジタ ノ ソウタイテキ スイコウド ガ ユウジン センタク ト シンミツセイ ニ オヨボス エイキョウ

イシダ, ヤスヒコ

Ishida, Yasuhiko

オオサカ ダイガク ダイガクイン ニンゲン カガク ケンキュウカ タイジン シャカイ シンリガク ケンキュウシツ

自他の相対的遂行度

友人選択

親密性

similarity in self-defining dimensions

relative performance

friendship choice

intimacy

The present study examined the effects of similarity in self-defining dimensions and relative performance on friendship choice and intimacy. Two-hundred and twenty-one undergraduates (84 males, 137 females) were asked to rate the amount of relevance (importance) of various activities for their self-definition, and their performance on each activity. They also rated the same items for a close friend, and a distant other, along with their intimacy with the close friend. The main results were as follows: (1) Participants perceived their close friend as more similar in self-defining dimensions. (2) They perceived their close friend's performance better than themselves on the low self-relevant dimension, and equally or better on the high self-relevant dimension. (3) With regard to intimacy, similarity in self-defining increased intimacy, but the effect of relative performance varied as a function of the close friend's relevance. When the close friend's relevance was high on high self-relevance, higher performance of the close friend increased intimacy, but when the close friend's relevance was low, their higher performance reduced intimacy.