This article is a critique of a study which concluded that there is a relationship between the use of obstetrical drugs and the behavior of infants during the first month of life. (BRT)

This article is a reply to a critique of the authors' study which concluded that there is a relationship between the use of obstetrical drugs and the behavior of infants during the first month of life. (BRT)

Sentence comprehension was examined as a function of speaking rate, sentence difficulty, and listener age and sex. Subjects were 360 normal children aged 5-9. (BRT)

Videotapes were made of the prehensile activity and looking behavior of 2- and 5-month-old infants in the presence of objects placed within and beyond possible contact distance. (BRT)

A model of infant social behavior is developed which incorporates attachment to the familiar and fear of strangers as well as detachment from the familiar and exploration of the stranger. (JMB)

Two experiments were conducted which investigated the developmental patterns of children's rehearsal and organization of material to be memorized. (JMB)

The relationship between preschoolers' motivation and performance and observed paternal behavior is explored. (JMB)

The relationship among the Piagetian concepts of identity, seriation, and transitivity was explored with preschool subjects. (JMB)

Developmental levels of gender identity in preschool children were investigated. (JMB)

Reports three experiments in infant visual perception which studied the processes underlying infants' shifts of fixation from one object to another. (JMB)

Reports two experiments which were designed to establish whether errors in infants' manual searches for objects are caused by changes in the location of an object or by the change in the relation between old and new hiding places. (JMB)

An experiment was performed to determine if unfamiliar laboratory conditions can affect infant research results. (JMB)

Studied infants' reactions to a Plexiglas box placed over a toy by their mothers. (JMB)

The behaviors of narcotics-addicted and nonaddicted newborns in the first 2 days of life were assessed and compared. (JMB)

Groups of second grade and college students were presented with a series of three-alternative, four-dimensional discrimination problems that contained probes for the subject's hypothesis. Subjects received either complete feedback or partial feedback. In the latter condition, when subjects were told their response choice was incorrect the correct…