Compared the performance of children with and without autism in object-based positive and negative priming tasks within a visual search procedure. Found object-based positive and negative priming effects in both groups, with no group differences in the magnitude of the effects. Compared to typically developing children, children with autism were…

The aims of this study were (1) to assess the relative effectiveness of verbal and visual elaboration prompts and question-answering prompts on children's incidental memory, and (2) to determine whether performance improvement associated with pictorial elaboration could be augmented by either verbal elaboration or question-answering procedures.…

Two studies investigated whether 10- to 11-month-olds possess skills for parsing ongoing behavior along boundaries correlated with initiation and completion of intentions. Found that infants showed renewed interest in test videos in which motion paused in the midst of an actor's pursuit of intentions; suspended motion at intentional boundary…

Examined whether age-related improvements in children's motor performance result from reduced noise in the output of the sensorimotor system. Found that performance improved with age. The force output signal exhibited increased irregularity and a more broadband frequency profile with increasing age under feedback. There were no age differences in…

This research study evaluated the effects of memory demand on sustained attention, by varying the time interval between the presentations of stimuli in a cognitive vigilance task. Sixteen retarded and 16 nonretarded adult observers performed four 60-minute visual vigilance tasks in which single digits were presented sequentially and successively…

Examined whether 6-month-olds expect people to behave differently toward persons and inanimate objects. Found that infants habituated to an actor talking to something hidden behind an occluder looked longer at an object, whereas infants habituated to an actor reaching and swiping looked longer at a person. No difference in looking at stimuli was…

Preschoolers viewed stimulus sets comprised of a sample picture and three types of matches and were asked to choose a match that "went with" each sample. Children's choices indicated that a shift occurs between 3 and 4 years of age from a taxonomic bias to a thematic bias. Animate sample stimuli enhanced children's tendency to adopt…

Three experiments examined development of perceptual causality in 3- to 9-year-olds. Findings indicated that participants of all ages assigned contact events (A moves toward B, which moves upon contact) to the physical domain and non-contact events (B moves before contact) to the psychological domain. Participants chose causality more often for…

The present research assessed the ability to attend to relevant information in the presence of irrelevant distraction in hyperactive (H), learning disabled (LD), and unselected (US) children. A total of 20 LD, 20 H, and 20 US children divided into younger and older age groups participated in the study. Younger children were between 94 and 104…

Results of two experiments show that only postinformative feedback intervals to be significant sources of variation; mean trends appeared to indicate that extended preresponse intervals interfere with performance, if anything. (Authors/MB)

Two experiments tested a neo-Piagetian model of verbal short-term memory, comparing it with the articulatory loop model. Findings indicated that the proposed model accounted for effects of M capacity, word length, and presentation modality on short-term memory. The model's fit to the data was acceptable, and parameter estimates were consistent…

Calm or crying 9- and 12-week-olds sat facing a researcher who gazed into their eyes or at their forehead and delivered either a sucrose solution or pacifier or delivered nothing. Found that combining sweet taste and eye contact was necessary and sufficient for calm 9- and 12-week-olds to form a preference for the researcher, but not for crying…

Compared the timecourse of inhibition of return (IOR) of young children to that of older children and adolescents in single and double cue procedures. Found no IOR in the young children unless a double cue was used, but for older groups, found IOR at all intervals with a double cue and the typical crossover pattern, with early facilitation…

In contrast with younger children of the same reading age, reading-disabled (RD) children performed poorly when they were required to independently abstract grapheme-phoneme (g-p) rules and use them to pronounce pseudowords. Results suggest a phonologically based productive deficit which interferes with the learning of g-p rules. (RH)

Four experiments examined whether reinstatement and reactivation reminder paradigms affected memory performance of 102 three-month-olds. Results indicated that a single reinstatement protracted retention twice as long after training as a single reactivation. The novelty of the reminder stimulus also affected duration and specificity of memory in…