Hypothesized that suicidal individuals perceive time as moving slower than do geriatric & normal patients. Behavioral type estimates of 2 short & 2 long time intervals were elicited from 15 serious suicide attempters, 15 geriatric patients & 15 normal hospitalized subjects. Suicidal subjects overestimated the length of the time intervals to a greater degree than did the other patients. Suggests time estimations increased faster for suicidals compared to others as interval length increased.