A chronobiological test for cognitive styles: Chrono-Trial Making

This paper presents a description of the test, Chrono-Trail Making, an adaptation of the format of the Trial Making Test of the Halstead-Reitan Neuropsychological Test Battery. Generated were 28 parallel forms adapted from Part A; another 28 forms were adapted from Part B. These forms are assumed to be of similar difficulty and to have the same physical characteristics as the two parts of the original test. Each of the series of 28 was given consecutively at 15-min. intervals. Examination of scores confirms the identification in 24 young men of a Basic Rest-Activity Cycle (BRAC) of 90- to 100-min. periods. These, it was proposed, may refer to two different cognitive styles.