Sex differences in friendship expectations: A meta-analysis

Friendship expectations are prescriptive normative behaviors and highly valued qualities in ideal same-sex friends. This paper reports the results of five meta-analyses of sex differences from 37 manuscripts (36 samples, N = 8825). A small difference favoring females was detected in overall friendship expectations (d = .17). Friendship expectations were higher for females in three of four categories: symmetrical reciprocity (e.g., loyalty, genuineness; d = .17), communion (e.g., self-disclosure, intimacy; d = .39), solidarity (e.g., mutual activities, companionship; d = .03), but agency (e.g., physical fitness, status; d = -.34) was higher in males. Overall expectations and symmetrical reciprocity showed small effect sizes. Medium effect sizes for communion favoring females and for agency favoring males support predictions of evolutionary theory.