Taylor, John F.; Hirt, Michael
doi: 10.1037/h0076724pmid: 1159115
Administered to 25 process and 25 reactive schizophrenics and to 25 normals the Digit Span Test under immediate-response, 15-sec delayed-response, and 30-sec delayed-response conditions. All Ss were male patients at a Veterans Administration hospital. Silence, music, letters of the alphabet, and additional digits were presented as distractors during the delay periods. Results show a main effect for the length of the delay period. In immediate-response conditions, there was no significant difference between groups in digit span performance. In delayed-response conditions, the process schizophrenic group showed a deficit under the silence and music distraction manipulations. A main effect for distractors was also found, indicating a decrement among all groups in performance under the letters and digits conditions. If interference effects occurred, they affected only the process schizophrenics and may possibly have been based on idiosyncratic, internally based associations. (17 ref)