Two experiments investigated whether preverbal infants distinguish between humans and mammals. Study 1 found that 7-, 9-, and 11-month-olds distinguished humans from mammals in an object-examination task. Study 2 found that 7-month-olds but not 5-month-olds showed evidence for category discrimination with the 2-dimensional color photos of toy…

A comparison of 46 language-delayed and 62 normal language onset children examined whether early language delay would predict autistic symptomatology in children diagnosed with autism when young and at an older age. Results found that early language delays predicted more autistic symptomatology when young, but not at an older age. (Author/CR)

Using multiple dimensions of solidarity and conflict in a latent class analysis, we develop a typology of adult child-parent relationships. The data (N = 4,990) are from the first wave of the Netherlands Kinship Panel Study. In descending order of relationship quality, the 5 types are harmonious (akin to relationships with friends), ambivalent…

Two studies of 7-, 8- and 9-year-olds assessed the effect on cognitive development produced by varying degrees of physical isolation of family dwellings and the consequent variation in the amount of verbal communication children had with peers and adults. (JMB)

Assessed organizational strategies for recall by comparing lists designed for recall by children in kindergarten, third and sixth grade with ordinary free associations, and by observing whether the lists served as units of organization in a subsequent free recall task. (Author/SDH)

Investigations of moral development have usually relied on longitudinal research on adolescent males; such research has served as a basis for national educational efforts to foster moral development. To represent female as well as male perspectives in constructing theories of human development, conceptions of morality and conceptions of self and…

Few studies concerning siblings have taken a lifespan approach, i.e., studying sibling relationships from childhood to old age. To outline the developmental changes that occur in the quality of the sibling relationship during various periods of the life cycle and to test the feasibility of devising a coding system to identify such changes, 47…

Relational-inference, a process associated with developmental change in performance on classification items, was investigated in two experiments. The accuracy and latency with which 20 subjects at each of 3 age levels (8, 11, and adult) stated relationships among concepts were tested. In experiment 1, 40 triplets of concepts related by a class…

An analysis of occupational age structures for males has pragmatic implications for vocational advice and decisions (particularly for older workers), personnel and manpower planning, and experimental research. (A 5-page appendix lists occupational age ratios for 2( categories of occupations based on 1961 census data.) (Author/AG)

This paper describes two studies conducted to investigate young children's manipulative responses to materials in a free play situation and to examine the resultant learning. Study I: Each child played with either a simple or a complex set of materials during three play sessions. Learning was measured on a posttest of classification ability.…

This study attempted (1) to test the efficiency, simplicity, and experimental power of Paul Diederich's Method for measuring growth in writing ability, a method which allows for the cooperative evaluation of student writing using local criteria, and (2) to use this Method to measure both writing ability and grading consistency in a specific…

Reported are data on the distribution of childhood disorders among 330 child patients (2 to 19 years old) referred for psychiatric evaluation; and analyzed are relationships among several diagnostic categories and subject variables. (SBH)

Demonstrates the usefulness of the inclusion paradigm as a methodological tool in providing information about the conceptual breadth of selected social and nonsocial superordinate categories in children who exhibit some degree of inclusion logic. (HOD)

Research has shown that children use physical features to distinguish among people, and that race can be distinguished by certain features such as skin color and the shape of eyes, nose, and lips. However, L. Hirschfeld (1993, 1994) has argued that children must have the concept of race before they form the race social category and that other…