select what is of most value to the worker.

METHODS OF SENSE TRAINING UNDER SCIENTIFIC MANAGEMENT.--The
senses are trained under Scientific Management by means of the
various sources of teaching. The instruction card, with its detailed
descriptions of operations, and its accompanying illustrations, not
only tends to increase powers of visualization, but also, by the
close observation it demands, it reduces the minimum visible. The
"visible instruction card," or working model, is an example of
supplementing weak power of visualization. The most available
simple, inexpensive and easily handled device to assist visualizing
is the stereo or three-dimension photograph, which not only serves
its purpose at the time of its use, but trains the eye to see the
third dimension always.

Much training is given to the eye in Scientific Management by
the constant insistence on inspection. This inspection is not
confined to the inspector, but is the constant practice of worker
and foremen, in order that work may be of such a quality as will
merit a bonus.

SENSES THAT ARE MOST UTILIZED BEST TRAINED.--The relative
training given to the various senses depends on the nature of the
work. When the ear is the tester of efficiency, as it often is with
an engineer watching machinery in action, emphasis is laid on
training the hearing. In work where touch is important, emphasis is
on such training as will develop that sense.[12]

VARIATIONS IN SENSE POWER SHOULD BE UTILIZED.--Investigations
are constantly going to prove that each sense has a predominance at
a different time in the age of the child or man. Dottoressa
Montessori's experience with teaching very young children by touch
shows that that sense is able to discriminate to an extraordinary
extent for the first six years of life.[13]

So, also, acute keenness of any sense, by reason of age or
experience should be conserved.[14] Such acuteness is often the
result of some need, and, unless consciously preserved, will vanish
with the need.

PROGRESS IN SUCH TRAINING.--The elementary sense experiences are
defined and described by Calkins.[15] Only through a psychological
study can one realize the numerous elements and the possibility of
study. As yet, doubtless, Scientific Management misses many
opportunities for training and utilizing the senses. But the
standardizing of elements, and the realization of the importance of
more and more intensive study of the