PSYC 3270 Lecture Notes - Lecture 8: Meningitis, Mothers Talk, Binocular Disparity

• School: York University
• Department: Psychology
• Course: PSYC 3270
• Professor: Laurie Wilcox

Document Summary

2 methods to measure visual acuity (for fine detail) of newborns & young. Infants: preferential looking technique, visual evoked potential (vep) The observer does not know which stimulus is being presented on each side. E. g. tell the differences between the grating & gray stimulus. Electrodes placed on the head, over the visual cortex. If the stripes or checks are large enough to be detected by the visual system, the visual cortex generates and electrical response (visual evoked. If, however, the stripes are too fine to be detected by the visual system, no response is generated. Thus, the vep provides an objective measure of the visual. Both techniques indicate that infants have poor visual acuity: 20 / 400 ~ 20 / 600 at 1 month, 20 feet (infant) = 400 feet or 600 feet (adult) Vep is more accurate than preferential looking: with vep, higher visual acuity can be detected (cycles / degree)