Description

Mc Dougall Disc PSAW A division of attention apparatus to show that if a job is done one at a time efficiency is more and if more than one jobs are performed simultaneously efficiency is reduced. The apparatus has three vertical rods erected straight on a wooden base and there are black and white discs placed in the central rod. The individual ia asked to put black discs in the left rod and white disc in the right rod with left hand. time taken is recorded. Now if the same individual is asked to repeat the same exercise with left hand and do some writing with the right hand , it is noticed that the efficiency is remarkably reduced.