dancy as a measure of stereotypy in human performance on randomization and spontaneous sequencing tasks. In the latter study they hypothesized that in a randomization task the control over stereotypy is limited by a subject's ability to randomize and in a spontaneous task by both his ability to randomize and his willingness, suggesting a distinction between cognitive and attitudinal (volitional) components of stereotypy. Higher stereotypy scores on spontaneous sequencing were hypothesized to be related to the attitudinal component. The present study was done to determine the correlation between the tasks of randomization and spontaneous activity, using the information-theoretic measure of redundancy as a measure of stereotypy. A relative lack of positive correlation would be consistent with the notion of cognitive and attitudinal components of stereotypy as independent factors of stereotypy, while a significant positive correlation would indicate a common factor of stereotypy in both types of tasks. Subjects were 106 undergraduates of both sexes; 52 were given the spontaneous sequencing task first, followed by the randomization task. The remaining 54 subjects were tested in the reverse order. Both tasks were those described earlier (1. 2). When the spontaneous sequencing task was presented first, the product-moment correlation was -.I09 (p > .05), but when the randomization task was first, 7 was .640 (p < .01). This discrepancy requires some explanation. The spontaneous sequencing task is induced by non-specific instructions (the subject does whatever he pleases), while the randomization task is preceded by specific randomization instructions (subject has to apply his ability to randomize the sequence). While the transition from non-specific to specific tasks would not be expected to contaminate the specific task (namely, randomization), the converse would not be equally logical. An initial specific task would be expected to carry over to the following non-specific task because subjects habituate to one particular mode of responding which is also consistent with and allowed by the non-specific instructions (namely, spontaneous sequencing instructions). Tbe correlation of .640 when the randomization task is first, should be interpreted as spurious (albeit on an ex port facto basis). This interpretation is supported by an inspection of the means. When the spontaneous sequencing task was second, the redundancy dropped to a low of .430 (compared with .659 when the same task was first), a level more consistent with redundancy obtained on randomization (.346 and .296, respectively). A lack of positive correlation, when the randomization follows the spontaneous sequencing task, supports the contention that the stereotypy in the two tasks is of two different kinds, namely, of a cognitive and of an attitudinal (volitional) type.