This paper aims to provide a systematic review of the literature on the associated factors with infant sleep-wake behaviour during the first 12 months of life, namely (1) the factors positively and negatively associated with sleep-wake behaviour and (2) the factors positively and negatively affected by sleep-wake behaviour. This systematic review…

This study investigates the importance of object function (action-object-outcome relations) on object individuation in infancy. Five experiments examined the ability of 9.5- and 12-month-old infants to individuate simple geometric objects in a manual search design. Experiments 1 through 4 (12-month-olds, N = 128) provided several combinations of…

The purpose of this research was to assess the infant's abilities to make successive discriminations in the size of a figure. The subjects were 90 10-month-old infants. (Author/MP)

A series of experiments demonstrated that sharing was a characteristic activity of children 18 months of age and younger. (SB)

The underlying theme of this review is that fine motor assessment for skills acquired during the first year of life includes a description of the coordination of reach and grasp behaviors into functional understanding, purposeful retention of an object, and manipulatian. The developmental sequence of these responses is listed in various…

Fifty 4-month-old infants were habituated to one wavelength of light and then tested for recognition with the original and two new spectral lights. After short- and long-term delays with different types of retroactive interference, the results indicated that the infants' recognition memory for hue was quite resilient to interference or delay. (JMB)

The relationship between visual stimulus intensity and finger movements was examined in infants ranging in age from 10 to 15 weeks and from 20 to 25 weeks. Infants were shown a cone that varied in size, brightness, and distance from them. (Author/JMB)

This study tested the hypothesis that one year old infants' wary behavior toward an unfamiliar female adult would decrease and affiliative behavior would significantly increase in the course of a relatively brief period. (Author/SB)

Examines the relationship between an infant's sex and its capacity to maintain eye contact. Subjects were 15 male and 15 female newborn infants. (MP)

Tested two competing hypotheses explaining infants' failure to search for an object in a new hiding place: (1) that the concept of object is not yet differentiated from the concept of place, and (2) that difficulties in spatial localization are responsible for the search failure. (Author/JMB)

The early phase of imitation was studied in children between 6 and 18 months by means of the presentation of 22 actions. (SB)

In this study examining infants' responses to optical expansion, 18 infants between 36 and 61 days old watched expanding shadows that differed in the terminal location of the center of expansion and the number of dimensions undergoing change. Babies consistently rotated their heads upward during expansion of a closed figure when the center of…

The relationship between visual stimulus intensity and directional finger movements was examined in infants of two age groups (16 infants, 10 to 15 weeks old, and 8 infants, 20 to 25 weeks old). Two hypotheses derived from Schneirla's Approach-Withdrawal Theory were examined: (1) that responses of the younger, but not of the older infants, would…