Category theory concept of a commutative diagram was used to construct a model of the way in which symbolic processes are applied to problem solving. It was shown that several different levels of thought can be distinguished within the basic model. Two experiments testing the theory are reported. (Author/RD)

Inference tasks emphasizing the acceptance of lack of closure (ALC), memory, and hypothetico-deductive reasoning were administered to 67 males and 74 females ranging in age from 5 to 12 years. Results suggest that the relationship of ALC to age is mediated by memory development rather than by logical development. (JMB)

Subjects examined crowded semirealistic layouts of toy objects, or photographs of these layouts, and then tried to identify added, moved or deleted items. The main study involved 96 subjects, 24 at each of four age levels (first, third, sixth grade, and adult). (MS)

Asserts that this book, drawn from a 1993 conference on memory development, accurately reflects the contemporary status of the field in two ways: (1) its research is matured and specialized; and (2) there are no major theoretical disputes, nor a widely shared new approach, although using microgenetic designs to study cognitive strategy choice…

Archaeology and cultural anthropology show that humans developed many discrete skills (social, technological, natural history, and language intelligence) over the past million years, but only recently have combined these into "broad" intelligence. Understanding learning is a key issue. Metacognition, the ability to consider one's…

Links between theory of mind and episodic memory involving autonoetic consciousness were investigated in Japanese 4- to 6-year-olds. After age was controlled for, most theory of mind abilities showed no interrelations. Own and others' belief understandings on deceptive appearance tasks were solely related to source memory. Results suggest that…

Assesses the effect of delay between an event and new postevent information related to it in six-month-old infants' memory. Three phenomena were studied: memory impairment, memory facilitation, and categorization. Suggests that postevent information has different qualitative effects depending on its timing, and provides a basis for understanding…

Two experiments compared preschoolers' awareness of knowledge transitions involving behavioral changes to those involving vocabulary or general knowledge changes. Found that children tended to report they had learned something new when novel information was behavioral (e.g., counting in Japanese) and tended to claim prior knowledge when the novel…

Preschool children experienced two special events and were asked a set of questions about one of the events on four different occasions over a seven-week period. Findings suggest that adult questioning enhances memory for specific recall, but does not enhance general memory performance. Results raise issues regarding how much children tailor their…

In memory strategy utilization deficiency, a child spontaneously produces an appropriate strategy but receives little or no benefit from it for recall. Three studies suggest two causes: children's failure to relate the task situation to their event knowledge, or to link the strategy to a second strategy, in this case linking a selective attention…

Examined the ability of 1-year olds to remember the location of nonvisible targets. Found that infants were able to associate a nonvisible target with a direct landmark and to code its distance and direction with respect to themselves or the larger framework. Difficulty of coding with indirect landmarks was associated with cognitive complexity and…

Examined changes in preschoolers' ability to distinguish among memories of performed, pretended, and imagined episodes, and used source monitoring as a tool for inferring the nature of preschoolers' conceptualization of pretense. Found significant improvements between ages three and four in their ability to distinguish performed actions from…

Assessed 25-month-old girls' and boys' immediate and delayed recall of sequences depicting female-stereotyped, male-stereotyped, and gender-neutral activities. Girls showed equivalent recall of all sequence types. Boys showed better recall of male- than female-stereotyped sequences, and equivalent recall of male-stereotyped and gender-neutral…

Presents a unified theoretical approach to children's false-memory reports that deals with both spontaneous and implanted reports. Details false recognition and misinformation models that allow researchers to determine the impact of identity judgment, nonidentity judgment, and similarity judgment in false memory reports. (LBT)

Notes that there has been far less mathematical modeling of children's memory than of adults' memory. Explores the flaw in fuzzy-trace model, and maintains that situations in which partial verbatim information is used along with partial gist information fall outside the boundary of this type of model. Suggests refining the concepts of and…