Self-limited and unlimited word usage during problem solving in two telecommunication modes

Subjects using oral modes of communication generate far more verbiage than do subjects using handwittenn or typewritten modes to solve the same problems. This study tested two alternative hypotheses to account for this disparity: (1) written modes produce a hard copy of interchanges, thereby compensating for the limitations of short-term memory and reducing the need to repeat information, and (2) talking is so easy that there is no incentive to be concise in oral modes. Two-person teams solved problems either by voice or by teletypewriter. Half the teams were given a monetary incentive to use as few words as possible. No such request was made of the control teams. Subjects in the brevity condition, regardless of the communication mode, greatly reduced verbiage with no increase in time or decrease in accuracy. Moreover, subjects in the brevity-voice condition used even fewer words than did subjects in the control-teletypewriter condition. These results, then, lend weight to the second hypothesis.