Objective: The authors used quantitative and qualitative methodologies to investigate college students' perceptions and use of illegal Attention Deficit Hyperactivity Disorder (ADHD) stimulants during spring and summer 2006. Participants: From fall 2005 through fall 2006, the authors studied 1,811 undergraduates at a large, public, southeastern…

Structural equation modeling procedures are applied to the standardization sample of the Woodcock-Johnson III to simultaneously estimate the effects of a psychometric general factor (g), specific cognitive abilities, and reading skills on reading achievement. The results of this study indicate that g has a strong direct relationship with basic…

Two experiments investigated whether young and old adults can temporarily remove information from a capacity-limited central component of working memory (WM) into another component, the activated part of long-term memory (LTM). Experiment 1 used a modified Sternberg recognition task (S. Sternberg, 1969); Experiment 2 used an arithmetic…

Sixty-four four-year-old and 64 five-year-old children were presented a set of 25 pictures of common objects, classifiable either perceptually (color) or semantically. (Author/CL)

Investigates the ability of four-, seven-, and ten-month-old infants to perceive and base novelty responses on correlations among perceptual attributes in a category-like context. In a habituation-dishabituation paradigm, ten-month-old infants clearly responded on the basis of the correlation among attributes, while four- and seven-month-old…

Third and seventh graders (age 9 and 13 years) were randomly assigned to three instructional groups and engaged in a sort/recall task. The instructions emphasized either (1) recall of the items, (2) meaningful organization of the items, or (3) meaningful organization and recall of the items. (Author/MP)

Eleven response types were identified and shown to form both a developmental and a hierarchical sequence of comparison and integration operations. An age-related progression in response abstractness was also found and a significant interrelation of response abstractness with response type was demonstrated. (RH)

Two studies explored the following two issues important in understanding the development of knowledge-based inferencing: (1) how children of different ages use a circumscribed and available knowledge base to make two types of inferences important for comprehension; and (2) how the accessibility of an available knowledge base is related to…

In a study of developmental differences in ability to suppress irrelevant information in working memory, children and adults provided endings for sentences that constrained a terminal noun. Responses to critical sentences were disconfirmed with unexpected endings. On another sentence-completion task with disconfirmed nouns, children showed priming…

Three experiments involving children and adults investigated age differences in repetition priming effects as contrasted with explicit recall and recognition. Findings showed that recall increased with age, but priming effects did not differ with age. Results suggest that implicit memory is insensitive to age differences and to encoding and delay…

Examined differences in first-, third-, and fifth-graders' metamemory about influences of conceptual relations on free recall of a list of words from two categories and an unrelated list. Found that older children attributed superior recall of related material to categorical relations, reported categorical organization strategies, and demonstrated…

Examined source monitoring and false memories in 6-, 8-, and 10-year-olds related to their memory of information presented by videotape and/or audiotape. Found that certainty rating revealed deficits in children's understanding of when they had erred on source questions and when they had made false alarms. Inhibitory ability accounted for unique…

This study evaluates whether tip of the tongue experiences (TOTs) are caused by a more accessible word which blocks retrieval of the target word, especially for older adults. In a ''competitor priming'' paradigm, young and older adults produced the name of a famous character (e.g., Eliza Doolittle) in response to a question and subsequently named…

We are pleased with the commentators' thoughtful reactions to our study, as they make it clear that the study met its major goal--identifying age differences that suggest developmental changes in the learning process and the strengthening of executive processes in the second decade of life.

Across two studies, a wide age range of participants was interviewed about the nature of death. All participants were living in rural Madagascar in a community where ancestral beliefs and practices are widespread. In Study 1, children (8-17 years) and adults (19-71 years) were asked whether bodily and mental processes continue after death. The…