TEACHING DONE BY MEANS OF MOTION CYCLES.--The best group is that which completes the simplest cycle of performance. This enables the worker to associate certain definite motions, to make these into a habit, and to concentrate his attention upon the cycle as a whole, and not upon the elementary motions of which it is composed. For example--The cycle of the pick and dip process of bricklaying is to pick up a brick and a trowel full of mortar simultaneously and deposit them on the wall simultaneously.[33] The string mortar method has two cycles, which are, first to pick a certain number of trowelfuls of mortar and deposit them on the wall, and then to pick up a corresponding number of bricks and deposit them on the wall.[34] Each cycle of these two methods consists of an association of units that can be remembered as a group. SUCH CYCLES INDUCE SPEED.--The worker who has been taught thus to associate the units of attention and action into definite rhythmic cycles, is the one who is most efficient, and least fatigued by a given output. The nerves acquire the habit, as does the brain, and the resulting swift response to stimulus characterizes the efficiency of the specialist.[35] SCIENTIFIC MANAGEMENT RESTRICTS ASSOCIATIONS.--By its teaching of standard methods, Scientific Management restricts association, and thus gains in the speed with which associated ideas arise.[36] Insistence on causal sequence is a great aid. This is rendered by the Systems, which give the reasons, and make the standard method easy to remember. SCIENTIFIC MANAGEMENT PRESENTS SCIENTIFICALLY DERIVED KNOWLEDGE TO THE MEMORY.--Industrial memory is founded on experience, and that experience that is submitted by teaching under Scientific Management to the mind is in the form of scientifically derived standards. These furnish (a) data that is correct. (b) images that are an aid in acquiring new habits of forming efficient images. (c) standards of comparison, and constant demands for comparison. (d) such arrangement of elements that reasoning processes are stimulated. (e) conscious, efficient grouping. (f) logical association of ideas. PROVISION FOR REPETITION OF IMPORTANT IDEAS.--Professor Ebbinghaur says, "Associations that have equal reproductive power lapse the more slowly, the older they are, and the oftener they have been reviewed by renewed memorizing." Scientific Management provides for utilizing this law by teaching right motions first, and by so minutely dividing the elements of such motions that the smallest units discovered are found frequently, in similar and different operations.