In spite of the generally conceded fact that kinaesthetic processes are of fundamental importance in animal behavior, almost nothing is known that bears specifically upon these processes. Except for Carr's recent extended study of simple alternation no attempt has been made to disentangle the kinaesthetic processes incident to all studies of discrimination from the matrix of other sensory processes in which they are obscured. The present study, first reported in 1918, attempts to determine how much a rat can do in terms of kinaesthesis using the following maze problems: simple alternation; double alternation (twice to the right side of the apparatus, twice to the left side, etc.); and a problem termed the "temporal maze." The present tests ultimately indicated that the rat has practically no capacity to set up habits where the sensory complexes succeed each other merely in time. It is possible that a rat might learn a space maze requiring simple alternation and then run it in terms of kinaesthesis. The animal however easily masters the ordinary maze where the choices may be in any combination. How can it use the kinaesthesis connected with a left turn at one time to initiate a turn to the right and at another moment to initiate a turn to the left? The tests reported here have indicated that this cannot be done unless spatially arranged cues are available. (PsycINFO Database Record (c) 2006 APA, all rights reserved)