Development in understanding the relation of others' behavior to own behavior

120 Ss from six age groups (range 7–22 years) were tested for their understanding that others' responses were related to a preceding behavior in Ss. The understanding was tested after experimental interaction episodes with Ss as participants. The results indicated the following development sequence: 7–9 year old persons relate others' response to Ss' behavior in situational terms, 11–13 year old persons relate others' response to others' perceptiodcognition of Ss' behavior, and older persons are able to relate others' behavior simultaneously to Ss' behavior and to dispositional properties in the others.