Thesis (Ph. D.)--University of Florida, 1982. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 92-111).

Thesis (M.S.)--Springfield College, 2002. / Includes bibliographical references.

Thesis (Ph. D.)--University of Texas at Austin, 2006. / Vita. Includes bibliographical references.

A considerable amount of research exists on the subjective perception of three-dimensional structure from texture gradients. The present set of experiments extends these tests of phenomenal perception by examining the underlying processes used in interpreting slant-from-texture. The first two experiments show that measures of subjective perception predict speeded performance in a visual search task, and that the mediating representation relies on an assumption of projective size (i.e., discriminating the size of the target is difficult when the short target is far or the long target is near). The third experiment shows that sensitivity to apparent depth in the texture display is present even in rapid and parallel search conditions where early vision is known to operate. The fourth experiment assesses the relative contribution of two dominant dimensions of the texture gradient -- "perspective" (i.e., a radial pattern) and "compression" (i.e., a foreshortened pattern). Both dimensions are detected by early vision as signals for apparent depth. The fmal experiment examines how early vision codes these two dimensions. Sternberg's (1969) Additive Factors Method (AFM) is used to assess separability of encoding, and Blalock's path analysis (1962, 1985) is used to examine the order of encoding. AFM shows that perspective and compression have independent influences on search performance in the most rapid search conditions, but that their interaction increases as search slows. The path analysis shows further that when both texture dimensions are available, perspective exerts a more immediate and perhaps even an exclusive influence on performance. These findings support the view that perspective and compression are coded separately at the earliest stages of visual processing and share a common code only later in visual processing. / Arts, Faculty of / Psychology, Department of / Graduate

published_or_final_version / Sports Science / Master / Master of Science in Sports Science

The effectiveness of imagery utilizing counterconditioning in the modification of attitudes toward elderly persons was explored. Ss were 162 introductory psychology students. Ss were divided into five groups with one group serving as a no-treatment control. The remaining four groups were instructed to imagine one of four types of scenes: I) reinforcing imagery scene with subjects instructed to picture themselves as the old man, 2) reinforcing imagery scene only, 3) neutral imagery scene with subjects instructed to picture themselves as the old man, 4) neutral imagery scene only.The criterion measure was post-test scores on an attitude questionnaire. An analysis of covariance treatment effects when the effects of the pre-test were held constant. No significant correlations were found between number of times Ss reported practicing the scenes and difference scores from pre-test to post-test. No support was given to the counterconditioning hypothesis of attitude change.

A dissertation submitted to the Faculty of Arts, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree, Master of Arts (Psycho!ogy)(By coursework and Research Report). / Despite the well documented advantageous functions of imagery rehearsal as it pertains to sporting performance, the relationship between relaxation, imagery rehearsal ability and brainwave activity has received relatively little attention from sport researchers. With this in mind, the primary purpose of the present study was to invest'gate the possibility of the existence (If such a triadic relationship and consider the implications that this relationship may have on the development of imagery intervention programmes in Sport Psychology. Two male and seven female undergraduate Physical Education students, aged between 18 and 28 years volunteered to participate in the study. The Vividness of Movement Imagery Questionnaire (VMIQ) was administered to all subjects in order to assess each subject's imagery ability. The subjects were then randomly assigned to either the control or to the experimental group. Two weeks after completing the VMIQ, the subjects completed the VMIQ for a second tim, During the second administration of the VMIQ all subjects were attached to an EEG ~ojectroencephalograph) machine. The strategically placed EEG electrodes were attached for the purpose of assessing whether or not significant changes in alpha brainwave patterns were evident during imagery rehearsal. The experimental group differed from the control group in that the experimental group took part in a relaxation exercise prior to completing the VMIQ for a second time, whilst the control group did not receive the relaxation intervention. The results of the study indicated that there was enhanced alpha brainwave activity in the right occipital lobe during the imagery conditions. Whilst it could be speculated from the research findings that imagery ability and. brainwave activity differed from individual to individual and from one imagery condition to another, these differences were not statistically significant. Although not statistically significant, the differences observed between the pre and post-test scores for the experimental group were however purported to be meaningful since three of'the four subjects from the experimental group showed an improvement on imagery ability following the relaxation intervention. This finding justifies the need for future research into the relationship between relaxation and imagery rehearsal. It was also concluded that whilst some subjects emitted the greatest alpha activity during the same imagery dimensions for which they reported the highest imagery abilitiy scores, other subjects emitted the greatest alpha activity during the same imagery dimensions for which they reported the lowest scores in imagery abilitiy. As such, it could not be concluded from the present research findings that a correlation between imagery ability and alpha brainwave activity actually exists.

Thesis (Ph. D.)--University of Chicago, Dept. of Philosophy, August 2001. / Includes bibliographical references. Also available on the Internet.

Thesis (M. Sc.)--University of Hong Kong, 2001. / Includes bibliographical references (leaves 86-94).

Thesis (M.A.)--University of North Carolina at Wilmington, 2003. / Includes bibliographical references (leaves : 209-213).