First, third, and fifth graders made judgments of the geographical slant of surfaces depicted in photographs while optical slant and postural orientation were manipulated. The results indicated the existence of a linear mechanism which compensates for the effect of postural inclination. (JMB)

Describes an experiment in which the rate of habituation of fixation of 12-week-old infants to a homogeneous stimulus series where a cube was presented in different orientations was contrasted with the rates of habituation to various heterogeneous series where a cube was alternated with some other solid. (Author/JMB)

Results reaffirm the notion that retarded individuals are less adept at recognizing familiar forms haptically than visually. (Author)

Children of ages two and one-half, three, and three and one-half years were tested for their understanding of object hiding. Results indicated that children of this age can be both nonegocentric and skillful at estimating what other people do and do not see under various viewing conditions. (JMB)

Distance estimates of locations in a camp setting were obtained from 9- and 10-year-olds and adults. Each subject estimated distance on two tasks: magnitude estimation and reconstruction. Data were analyzed for the effects of certain environmental features such as buildings, trees, and hills. (JMB)

The role of memory factors in the vowel discrimination of normal and at-risk 8-week-old infants was examined by studying the categorical versus continuous discrimination of very brief vowels in a nonnutritive sucking paradigm. Discrimination of the silent delay interval between the last familiar and the first novel stimulus was also examined.…

The visual and motor responses to novel and familiar stimuli were measured in twelve 6-month-old infants, using new measures of integration and concordance. Results indicate that the infants' responses to the stimuli were both integrated and concordant. (Author/JMB)

The reactions of 112 10-month-old male infants to the property of curvature were examined using a habituation paradigm with lever pressing as an instrumental response. (SB)

Describes two experiments which examined the relation between neonatal cry features and obstetric histories. Experiment 1 showed differences in pitch and durational features between the cries of high- and low-complication newborns. Experiment 2 showed differences in the cry ratings of the two groups on dimensions such as aversive, sick, urgent,…

Results showed that 2- and 3-dimensional forms affected 4- and 8-week-old infant visual behavior differently. (Author/JMB)

Two studies: (1) assessed the infant's ability to perceive differences between two-dimensional and three-dimensional stimuli; and (2) tested the infants' ability to transfer responses across dimensions. (Author/SB)

Examined length of fixation time responses of neonates to pairs of red, blue, and green acetate stimuli. (Author)