When 48 first-, fourth-, and seventh-grade boys (classified as high, moderate, or low on an expectancy of success measure) were given a repetition choice task, a developmental trend in number of children choosing the interrupted task was found. When the task's difficulty level was matched to the child's grade, the trend was not found. (Author/JH)

Twenty subjects at each of four age levels (8, 10, 12, and 18) rated linguistic units of prose passages in terms of their importance. Third- and fifth-grade subjects did not differentiate items in terms of their relative importance to the text and at all ages such judgments were related to recall. (Author/JMB)

Involving second, fourth, sixth, eighth, and tenth graders and undergraduates, three experiments evaluated the prediction that representations of knowledge of the weeks and months of the year develop from a verbal-list stage to a stage at which image representations are present. Results are interpreted as supporting the two-stage model and appear…

Discusses issues making developmental studies of forgetting difficult to interpret: (1) stages-of-learning confounds, (2) failure to separate forgetting from performance factors operating on retention tests, and (3) failure to disentangle contributions of storage-based and retrieval-based forgetting to retention test performance. A paradigm and…

Tests two hypotheses concerning developmental change in the speed of cognitive processes: (1) age differences in processing time reflect changes that are specific to particular tasks, and (2) age differences in processing speed do not reflect task-specific change but are due instead to more general developmental change. (HOD)

Two studies indicate that Oksapmin children progress from premediational to mediational phases in their use of body parts to compare and reproduce number and that this change generally occurs prior to the development of concepts of number conservation. A third study shows that this general change is manifested in culturally specific ways.…

Two cognitive tasks of physical uncertainty were used to assign 56 subjects (aged 5 to 17 years) to one of three cognitive stages. Two tests for comprehension of speaker uncertainty were then administered to all participants. Results were interpreted as showing that development of cognitive stages is structurally related to comprehension of speech…

Explores age differences (6 to 22 years of age) in conceptions about the nature of the skills required by verbal and nonverbal (abstract) intelligence tests. (HOD)

Eighty children between the ages of 6 and 13 were asked to indicate and compare the needs and earnings of doctors, bus drivers, waiters, and shopkeepers. Youngest children did not perceive that unmet needs existed. Older children recognized the needs but sharply disagreed about inequalities. (Author/DB)

Examined the relationship between childhood malnutrition and later intellectual development in 18 severely malnourished (SM) children who participated in a 3-year home visitation intervention. Follow-ups done 7, 8, 9, and 14 years after hospitalization showed that these children had markedly higher vocabulary and achievement scores than a control…

Examined the developmental sequence through which adolescents progress in solving a physics problem (balance beam ratio and proportion) and a social problem (predicting the behavior of a story character). Although most of the 9- through 19-year-olds performed at predictable and similar developmental stages on each task, a minority were more…

Three groups of sixth, eighth, and tenth graders took pre- and posttests on a Piagetian problem and a problem that evoked a misconception. Two intervention groups engaged in group transactions intended to create inter- and intrapersonal conflicts or took a multiple-choice test. Results indicated that treatment groups progressed on the Piagetian…