To investigate developmental differences in time-sharing performance, 60 boys, 20 in each of three age groups (7-, 10-, and 13-year-olds) performed an auditory matching task and a tracking task alone and concurrently, the latter under two sets of instructions. (Author/JH)

Five developmental experiments examine the role of context in visual search. (Author/JH)

A recall paradigm tested twenty-four 5-year-olds and twenty-four adults on short-term recognition memory for briefly presented visual information. Results indicate that processes other than verbal labeling are probably more responsible for age differences in immediate memory performance than labeling. (JH)

In three experiments boys and girls, aged 7 to 9, were played humorous recordings through headphones in dyadic and solitary conditions to investigate companion influences on humorous laughter and smiling. Interaction data discussed. (JH)

Using signal detectability theory, analysis was performed on auditory frequency sensitivity data obtained by Hutt et al, 1968, on human neonates. Reanalysis using 12 male infants confirms superiority of lower frequencies and square waves in provoking startles in neonates. No state of arousal effects were found on sensitivity. (JH)

Two experiments are reported that reveal the sources of the developmental difference reported by Crane and Ross that second graders learned more than sixth graders about attributes made relevant after solution of a discrimination task. Experiments use technique whereby children verbalize their hypotheses during solution of a discrimination…

In a visual memory task, two degrees of stimulus detail were compared to test Reese's hypothesis that stimulus detail would facilitate retention of paired associates for young children. Forty 4-year-olds and forty 5-year-olds were tested to assess reported trend that elaboration facilitates retention for older children. (JH)

Twenty 3- to 5-year-olds were required to discriminate between a simultaneously-presented pair of displays having common elements but differentiated by the presence of a distinctive feature in one of the displays. The effect of explicit verbal feedback for incorrect choices on the learning of discriminations was examined. (JH)

Seven and 10-year-olds were tested on memory and sex-role preference tasks. The memory task was the Wickens release from proactive inhibition paradigm in which short-term recall of words is tested on successive trials. Children selected favorite pictures from an array including masculine and feminine items. (JH)

In a free recall task with categorized lists, 40 fifth graders' and 40 adults' retrieval was examined temporally by means of interword response times. List organization and retrieval cue factors were manipulated in order to assess the developmental relevance of an hypothesized three component retrieval model. (JH)

An experiment tested for the Moss Harlow Effect in 3- and 5-year-olds with stimulus novelty equated. Experimental groups familiarized themselves with each pair of test objects by sorting them, then received a P or N information trial and test trials. (JH)

Three groups of children, thirty in each group (3-4, 5-6, and 7-8 years), were shown an ambiguous color labeled green or blue or unlabeled. They were then given a generalization test to determine if the provided label would produce differences in the shape of the generalization gradient. (JH)

Forty retarded children, a Low Mental Age (MA) Group (mean MA 3-3 years) and a High MA Group (mean MA 5-7 years) were trained on 120 different two-choice visual discrimination problems. Initial performance differences were interpreted as a differential preference for novel and familiar stimuli. (JH)

To assess the effects of toy guns and toy airplanes on children's antisocial behavior, 4- and 5-year-olds (ten in Study I and 13 in Study II) were observed during 15-16 free play sessions. During experimental sessions children played either with (novel, aggressive) toy guns or with (novel, nonaggressive) toy airplanes in addition to their usual…

Twenty-eight children at each of five grade levels (nursery-1, 3, and 5) were tested in a serial-position recall task. Stimuli were pictures of common objects and animals whose labels were one or two syllables in length. Following testing, children were asked to report the memory strategy used. (JH)