Although Hollander characterized idiosyncrasy credit as the product of
perceptions group members have of one another no one has ever capture
d these perceptions. We suggest that perceptions of idiosyncrasy credi
t are directly accessible as an empirical and measurable concept. To d
emonstrate this, we followed seven naturally occurring, on-going work
groups and asked group members to report the level of idiosyncrasy cre
dit measured as latitude to deviate and seriousness of consideration-t
hey allocated to each other: Our results indicated that perceptions of
idiosyncrasy credit were internally reliable across items, across tim
e, and across group members. Further perceptions of idiosyncrasy credi
t were predictably related to leadership and socially dominant behavio
rs. Group performance moderated these relationships. implications of t
his study for research on idiosyncrasy credit, leadership, and group p
erformance were discussed.