In subject-performed tasks (SPTs) the participants are given verbal action phrases and perform the required actions before they recall the phrases. It is hypothesized that the item-specific memory encoding of SPTs may be related to verbal and motor component which are produced by planning and execution. The present study was to verify this item-specific processing theory. Under conditions of an expected-verbal or motor recall, and using a standard procedure, three experiments were used to compare the subjects memory span: SPTs; experimenter-performed tasks (EPTs); and verbal tasks (VTs). In each experiment the interference effect was measured for each concurrent task: concurrent articulation; concurrent movement; and a concurrent spatial task. In all of the encoding and concurrent task procedures 48 subjects participated under either of the recall conditions. The results indicated that only concurrent movement interfered with the length of SPTs with an expected verbal recall was different from that of SPTs with an expected motor recall. It is concluded from these findings that enactment may not lead to planning and execution, but that item-specific encoding of SPTs be related to and integration of verbal and motor components.