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D J Greenberg

Publications and source records attributed to D J Greenberg.

12 recordsLinked to original sources
PubMed1977

The visual-preference technique in infancy: effect of number of stimuli presented upon experimental outcome.

To examine the effects of the number of stimuli presented when the visual-preference technique is used to measure attention in infancy, 2- and 4-month-old infants were randomly assigned to 1 of 3 experimental conditions. In the first condition, infants were shown 3 different checkerboards using the single-stimulus visual-preference methodology; in the second condition, 4 checkerboards; and in the third condition, 5 checkerboards. Infants in both the 3- and 4-pattern conditions were able to order the patterns as predicted by scaling theory. However, there was a significant decrease in the number of infants in the 5-pattern condition who could do so. The results are discussed in terms of both their methodological and theoretical implications.

Age Factors↗
PubMed1975

Perceptual incongruity and social interaction as determinants of infants' reaction to novel persons.

To investigate the contrary position of perceptual incongruity and social interaction theories regarding birth order and reactions to novel persons within the first year of life, novel persons were presented to 96 first and later borns 8 and 12 months of age. Because firstborns, exposed to more positive social interaction within the family within the first year of life, were more positive towards strangers than were the later borns, the authors concluded that by the end of the first year of life the nature of the infant's social interaction within the family, rather than the number of perceptual encounters, is the major determinant of infants' reaction to novel persons in their enviornment.

Attention↗
PubMed1975

Visual complexity in infancy: contour or numerosity?

To examine the relationship between visual attention in infancy and the stimulus variables of contour and numerosity, 2- and 4-month-old infants were placed in 3 experimental conditions. In the first condition, the patterns shown to the infants varied in amount of contour but had an equal number of elements; in the second, they varied in numerosity but had an equal amount of contour; and in the third, the patterns varied in both numerosity and contour. The results showed that contour and numerosity acting in tandem are responsible for the age-complexity shift observed in previous investigations of infant attention.

Attention↗