The time it takes to identify facial expressions: Effects of age,gender of subject,sex of sender,and type of expression

Subjects were presented with 35 mm slides of faces and required to indicate the type of expression (pleasant or unpleasant) by a switch movement. Latency and accuracy were recorded. The variables of the study were age (early or late adolescence), gender of subject, sex of sender, and type of expression. The most important results were as follows: There was no age effect when the latencies were adjusted by a covariate to take account of age-related differences in general perceptual-motor skills. There was a strong interaction in which the female pleasant slides produced substantially lower latencies than the other three combinations of sex of sender and type of expression. A weaker interaction indicated faster identification for the female sender, female subject condition than the other three combinations of sex of sender and gender of subject. Overall, the facial identification process was found to be very rapid (about a quarter of a second slower than identification of a simple geometric form) and accurate (.078 error rate).