A total of 96 first graders, fifth graders, and college students were asked to predict how many orally presented nouns they would later be able to recall or recognize. Results showed large developmental differences in prediction accuracy on the recall but not on the recognition tasks. (Author/JMB)

This study attempted to clarify the developmental progression in the understanding of conditional sentences by evaluating the capacity of 71 third, 70 sixth, and 64 ninth graders to learn three interpretations of abstract conditional sentences. (JMB)

A 16-item conditional reasoning test was given to 281 students in grades 8, 10, 12, and 14. Developmental patterns of performance were examined. (Author/JMB)

Twenty infants were observed at home interacting with their mothers, fathers, and an unfamiliar investigator when they were 15, 18, 21, and 24 months of age. (Author/JMB)

Cohort-sequential analyses were conducted on measures from the Primary Mental Abilities Test and the Test of Behavioral Rigidity for 2,151 participants at the first testing and 723 individuals at the retesting 7 years later. Data were examined for 7-year age intervals from 25 to 81 years and cohort intervals from 1889 to 1938. (Author/JMB)

Two experiments tested the applicability of Anderson's relative-weight averaging model to children's moral judgments based on intentions and consequences. (Author/JMB)

A sample of 80 females in grades 6, 8, 10, and 12 were presented with 10 of the Piagetian formal operations tasks. Analyses of the data indicated that as grade increased, mean scores on the 10 tasks also increased. (Author/JMB)

The ability of two groups of 6-year-old boys to detect deviations from direct eye contact from an adult and a child peer was assessed by means of an on-face versus off-face gaze detection task. (JMB)

Interest in babies was assessed for 32 children aged 8 to 9 years and 32 children aged 14 to 15 years. Data were collected by means of a 6-second time sampling of waiting room behaviors in the presence of a live baby and by reactions to pictures of babies versus other objects. (Author/JMB)

This study examined the construction of a mobile with plastic construction straws in order to study the development of tree representations in a domain other than language. Subjects were 70 children between the ages of 3 and 11. (Author/JMB)

Subjects in grades 4 through 12 were asked to respond to the question "Who am I?" Their responses were analyzed for self-conceptions by means of a 30-category scoring system. Results were in agreement with Werner's notion that cognitive development proceeds from a concrete to an abstract mode of representation. (Author/JMB)

This study investigated whether 4- and 5-year-old children can evoke and use kinetic imagery and whether the ability to use kinetic imagery depends on the attainment of concrete operations. Results yielded no evidence of association between kinetic imagery and conservation. (Author/JMB)

The relative effectiveness of semantic and structural retrieval cues was examined in men of three age groups: Group 1 (aged 20-39), Group 2 (aged 40-59), and Group 3 (aged 60-80). (Author/JMB)