Ninety-four male and ninety-six female college students were administered a kind of jigsaw puzzle in order to examine the actor-observer attributions for success and failure in non-competitive situations. Subjects were asked to rate the extent to which they attribute their own and their partner's outcomes to four causes: ability, effort, task difficulty, and luck. They were also asked to predict their partner's attribution for them. The dual scaling method was applied to the rank-order data form. Results revealed that there were various trends of causal attribution on success but not on failure. The influences of outcome patterns for self-other and the effects of the subject's gender were also examined.