Cognitive Psychology Commons^™

Methodological, Modal, And Cross-Modal Studies Of Short Interval Judgements Of Duration, With Specific Reference To The Development Of A Model Of The Internal Clock, Michael J. Procyshyn

Theses and Dissertations (Comprehensive)

A series of experiments was carried out to investigate: (1) the effect of a background sound applied at either the input and/or the output stages on judgements of visual intervals made using the methods of verbal estimation, operative estimation, and reproduction; (2) the effect of lack of knowledge of the method of response during teh input stage of temporal information on the judgement made; (3) the effect of auditory visual cross-modal stimuli on reproductions of intervals; (4) the effect of lack of knowledge of the mode of response during the input of cross-modal temporal stimuli.

Analysis of the data revealed: …

Shock Intensity And Task Difficulty As Determiners Of Avoidance And Escape Learning In Rats, Arthur Louis

Theses and Dissertations (Comprehensive)

Thirty-six naive female hooded rats were divided randomly into three groups and tested in an instrumental escape and avoidance learning situation involving three degrees of task difficulty. Each group was also randomly subdivided into four subgroups, each of which underwent a different shock intensity level. The purpose of this study was to test the Yorkes-Dodson law which states that (a) there is an optimal level of punishment intensity for any given task (or an inverted-U curve relating shock intensity and performance) and (b) this optimal intensity decreases as task difficulty increases. The results supported (a) but not (b).