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Zebrafish Retinal Development And The Effects Of Abnormal Light Rearing Conditions, Shannon Saszik
Zebrafish Retinal Development And The Effects Of Abnormal Light Rearing Conditions, Shannon Saszik
Masters Theses & Specialist Projects
Anatomical and physiological studies have shown that the zebrafish is a useful model of vertebrate visual function. Anatomy has shown that the zebrafish possess the traditional three cone types (S-, M-, and L- cones), and a fourth cone type that is sensitive to ultraviolet light (U-cones). Physiologically, the adult zebrafish appears to have a complex visual system with color opponent mechanisms. Anatomical results suggest that the zebrafish may be a good model of retinal development as well. The zebrafish retina develops in a sequential manner and is immature at hatch. Bilotta et al. (1996) also found that the retina was …
Iconic Memory And Aging: Effects Of Stimulus Duration, Stimulus Contrast, And Inter-Stimulus Interval, Andrew Lajoie
Iconic Memory And Aging: Effects Of Stimulus Duration, Stimulus Contrast, And Inter-Stimulus Interval, Andrew Lajoie
Masters Theses & Specialist Projects
Previous studies have shown that old adults perform more poorly on the classic Sperling partial report task than do young adults. In this study, the researcher examined whether age differences in performance could be accounted for by changes in visual and perceptual ability. Eighteen old adults (M = 70 years) and 18 young adults (M = 22 years) were administered whole and partial report trials with stimulus durations of 150 ms; a second group of 18 young adults was tested with stimulus durations of 30 ms. Stimuli were presented at two levels of contrast (98 and 44 percent) and the …