creators_name: Harnad, Stevan creators_id: harnad@ecs.soton.ac.uk type: thesis datestamp: 2011-11-10 23:37:46 lastmod: 2011-11-10 23:37:46 metadata_visibility: show title: The effects of fixation, attention, and report on the frequency and duration of visual disappearances ispublished: unpub subjects: percep-cog-psy full_text_status: public keywords: attention, perception, vision, stabilized images, fatigue, fixation, report, consciousness, awareness, activation abstract: Subjects viewed steadily two luminous dots with various instructions as ta where ta fixate and attend, and what disappearances ta report. An analysis of the results showed that the frequency and duration of disappearances was significantly influenced by fixation,attention, and report. A control indicated that the attention effect was not simply due ta missing unattended events. It was suggested that these uncontrol led factors might have confounded some of the visual disappearance research results and that attention might be the primary determinant of the meaningful perceptual unit effect. date: 1969-04 date_type: completed institution: McGill University department: Psychology refereed: TRUE referencetext: Dicara, L., & Barmack, J. E. The effect of reporting procedures on the stabilized retinal image. Paper read at Eastern Psychological Association, Atlantic City, April, 1962. Donderi, D. C., & Kane, Eleanor. Perceptual learning produced by common responses to different stimuli. Canadian Journal of Psychology, 1965, 19, 15-30. Farde, J. J., Piggins, D. J., & Mackinnon, G. E. Fragmentation and regeneration, of retinal images. Paper delivered at 27th Annual Meeting of the Canadian Psychological Association, 1960. Harnad, S. R. Partial disappearances of luminous forms and after-images. Unpublished undergraduate honors thesis, Psychology, McGill University, 1967. Hari, J. Luminous figures: influence of point of fixation on their disappearance. Science, 1964, 143, 1193-1194. Hebb, D. O. The semi-autonomous process: Its nature and nurture. American Psychologist, 1963,,18, 16-27. Heron, W. Percept i on as a function of retinal locus and attention. American Journal of Psychology, 1957, 70, 38-48. McKinney, J. P. Disappearance of luminous designs. Science, 1963, 140, 403-404. Orbach, J. Differential recognition of Hebrew and English words in right and left visual fields as a function of cerebral dominance and reading habits. Neuropsychologia, 1967, 5, 127-134. Pritchard, R. M. Stabilized images on the retina. Scientific American, 1961, 204, 72-78. Pritchard, R. M., Heron, W., & Hebb, D. O. Visual perception approached by the method of stabilized images. Canadian Journal of Psychology, 1960, 14, 67-77. Schwartz, M. The effects of attention on the disappearance of luminous figures. Unpublished undergraduate honors thesis, Psychology, McGill University, 1964. citation: Harnad, Stevan (1969) The effects of fixation, attention, and report on the frequency and duration of visual disappearances. [Thesis] document_url: http://cogprints.org/7707/1/fixation-harnad.pdf