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 is asked to put black discs in the left rod and white discs 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.
