Abstract
Infants 61/2-15 months of age were tested on the visual cliff with the textured visual surface 5 in. below the glass. Infants were called by the mother from the bisection of shallow and deep sides or from across the deep side. The bisection condition was a threshold in that only 73% of the infants went to the shallow side compared to over 907c at greater visual depths. Most infants could be coaxed across the deep side at 5-in. visual depth, a big change from the 10-in. visual depth, particularly for infants over 10 months of age, few of whom crossed the deep side with 10-in. visual depth.
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References
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This research was supported by grants from the National Science Foundation. I thank Mary Jane McGill and Richard Hodson for help in the main experiment and many others for help in the full range of data shown in Tables 1 and 2.
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Walk, R.D. Two types of depth discrimination by the human infant with five inches of visual depth. Psychon Sci 14, 253–254 (1969). https://doi.org/10.3758/BF03329108
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DOI: https://doi.org/10.3758/BF03329108