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Biomedical subjects

A Ivinskis

Publications and source records attributed to A Ivinskis.

6 recordsLinked to original sources
PubMed1982

Detection of moving stimuli in the binocular and nasal visual fields by infants three and four months old.

A technique of monocular eye patching was used to measure the response of infants three and four months old to nasally and temporally placed stimuli at various eccentricities in the visual field. The results indicated a field of field of binocular overlap of approximately 60 deg in infants three months old and 80 deg in infants four months old. These figures compare with visual field widths obtained under binocular viewing conditions of at least 140 deg in infants three months old and of at least 150 deg in infants four months old.

Child Development↗
PubMed1982

Visual attention in infants: a study of stimulus complexity, habituation, and sex differences.

A modification of Cohen's (1973) method was used to study responses to patterns of varying complexity in 4-mo.-old infants. Complexity in this context was defined in terms of the number of elements and the degree of internal contour contained in a given pattern. The infants were first presented with small red circles on two trials. This was followed by 16 trials of exposure to either 2 x 2 or 8 x 8 or 24 x 24 small red-circle matrix patterns which again were followed by two further exposures (trials) to the small red circle. Response decrement across trials was measured as a function of fixation, i.e., the duration of time the infant was judged to be looking at the stimulus, and latency, i.e., the time it took the infant to orient toward the stimulus pattern. Infants preferred the more complex patterns. All infants showed decrement in duration of fixation across trials for all three types of pattern. Latency of head turning did not change across trials but differed between pattern types. There were not significant sex differences in habituation rates as measured by duration of fixation and latency.

Attention↗