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Cognition and Perception Commons

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Full-Text Articles in Cognition and Perception

Ames Trapezoid Illusion: A New Model, Daniel Robert Kelly Sep 1971

Ames Trapezoid Illusion: A New Model, Daniel Robert Kelly

Dissertations and Theses

Current explanations for the Ames Trapezoid Illusion are based upon the the absence of cues: the illusion is said to occur at chance. A review of recent literature showed that: (a) the illusion varies in frequency as a function of target shape (b) that the dominant cue to reduce the frequency of the illusion is the variant in retinal height. Based upon the dominance of this cue a new model was presented. Following this model it was hypothesized that observers viewing partial rotation when the target produces the greatest difference in the retinal height of the ends would determine the …


Effects Of Volition And Justification On The Arousal Of Dissonance During Performance Of A Dull Task, George Roger Schoenhals Jun 1971

Effects Of Volition And Justification On The Arousal Of Dissonance During Performance Of A Dull Task, George Roger Schoenhals

All Master's Theses

The present study seeks to add a modest degree of clarification to the present condition of dissonance theory. More specifically, its main purpose is to help define certain conditions for the arousal of cognitive dissonance.


Schedule Interactions And Stimulus Control, Andrew Louis Homer Jan 1971

Schedule Interactions And Stimulus Control, Andrew Louis Homer

Dissertations and Theses

Four types of schedule interactions have been defined: positive contrast, negative contrast, positive induction, and negative induction. Most work has centered on the necessary conditions for positive contrast. One position states that a reduction in reinforcement frequency is necessary; the other view states that a reduction in response rate is necessary. Neither view can account for the occurrence of induction. The present experiment tests the hypothesis that stimulus control effects the occurrence of either contrast or induction. Three pigeons were trained to respond for primary reinforcement (strong stimulus control condition), and three pigeons were trained to respond for conditioned reinforcement …