A longitudinal study of friendship development

At 3-week intervals during their first term at the university, 84 male and female freshman completed questionnaires regarding their relationships with two same-sex individuals whom they had just met. Results showed that dyads which successfully developed into close friendships by the end of the fall school term differed behaviorally and attitudinally from dyads that did not progress. As the friendships developed, the intimacy level of dyadic interaction accounted for an increasing percentage of the variance in ratings of friendship intensity beyond that accounted for by the sheer quantity of interaction. Ratings of relationship benefits were consistently positively correlated with friendship intensity and increased as the relationship progressed. There were no differences in ratings of relationship costs between close and nonclose friends. Dyadic behavior patterns and attitude ratings at the end of the fall school term were good predictors of friendship status 3 months later. Motivational and situational factors were also correlated with friendship outcomes.     

A cross-national study of cognitive style among managers and technicians(1)

This study explains differences among managers and technicians in twenty-two non-western countries in terms of the field articulation cognitive style. A review of the behavioral referents of the field articulate cognitive style suggested that this variable is appropriately related to occupational interests and tasks and adaptability to industrial technique. Previous studies also suggested the hypothesis that socioeconomic status variables are related to both cognitive style and national or cultural differences. This hypothesis was confirmed using both the EFT and the RFT as measures of field articulation in a group of three hundred twenty-nine managers and technicians representing twenty-two non-western developing countries. Several explanations of these findings are discussed in terms of functional requirements for adult roles in a society and in terms of the relative affluence or level of poverty.     

Language and the latent structure of cognitive development (1)

A cross-cultural method was used to explore theoretical implications of the reported association between mastery of the comparative forms in language and development of competency in dealing with difference and equality relations (such as those of Piaget's conservation problems). Since Turkish allows comparisons to be made without the use of a morphologically distinct form (equivalent to: John is to Mary tall), it was selected for contrastive study along with English and Greek which share a similar system for comparisons. One hundred and ten English, Turkish-Cypriot and Greek-Cypriot children (age 4–11) attending school in London were tested on a variety of language, conservation, and multiple classification problems. The results of this testing indicated that language competency does play a significant role during the course of cognitive development, and that variations in language structure can engender parallel variations in the structure of development. Statistical analyses suggested the following specific conclusions: (1) the concrete operations stage is not functionally unified; (2) the structure of development during this stage is multidimensional; and (3) constancy across cultures in the ordering of development during this stage arises, in part, from similarities between their languages in the representation of attribute and difference relations.     

A longitudinal study of the social and academic competence of economically disadvantaged bilingual preschool children

This longitudinal study was conducted to gain understanding of the social-emotional and academic development of economically disadvantaged bilingual preschool children. In Study 1, the authors combined cognitive, psychosocial, and cultural-linguistic factors to determine profiles of social competence as measured by peer play. A person-centered analysis of 207 Hispanic American preschoolers (ages 4 and 5 years) yielded 6 distinct profiles, 2 of which were socially competent and 1 of which was vulnerable. Findings revealed profile differences in social competence and a significant relationship between bilingualism and social-emotional development. In Study 2, the authors determined which profiles were associated with later academic achievement and growth of English proficiency. Findings indicated a significant relationship of early social-emotional development to later academic success and English acquisition, highlighting the role of bilingualism.     

Assessment of cognitive function across pregnancy using CANTAB: A longitudinal study

Significant changes in endogenous plasma hormone levels are required to sustain pregnancy which provides a unique opportunity to study their effect on cognitive function.     

A longitudinal study of child siblings and theory of mind development

This study tested a sample of 63 children twice in a longitudinal design over 14 months to examine their theory-of-mind (ToM) understanding in relation to their number of child-aged siblings (1–12 years). Age-appropriate batteries of ToM tests emphasising false belief were given at the start of the study, when children had a mean age of 4–2 (range: 3–3 to 5–6), and at the end, when mean age was 5–4 (range: 4–3 to 6–9). Irrespective of chronological age, children with 2 or more child siblings scored significantly higher on both the earlier and the later battery than those with no child-aged siblings. Hierarchical multiple regression analyses revealed that, over and above chronological age and verbal intelligence, having more child siblings predicted higher ToM scores at Times 1 and 2. Furthermore, at Time 2, the participant's number of child-aged siblings continued to predict higher ToM scores even after controlling for age, verbal intelligence, and Time 1 ToM scores. Results were considered in relation to the kinds of family-based social and conversational experiences that might foster ToM growth throughout the period from toddlerhood to the threshold of primary school.     

A short-term longitudinal study of the early development of self-regulation

A short-term longitudinal study was conducted to determine whether self-regulation at 4 years could be predicted from child and maternal measures obtained when the children were age 24 months. The subjects were 69 children and their mothers drawn from the general community. Criterion behaviors assessed at 4 years were those suggestive of attention-deficit hyperactivity disorder. Of the 24-month child measures, maternal ratings of the child's impulsivity and attention span, plus an objective measure of delay ability, were the most effective predictors. Maternal negativity, as assessed in mother-child interaction, predicted the criterion behaviors, even after the child's behavior as an elicitor of maternal behavior was controlled. Maternal child-rearing attitudes on the dimensions of warmth and aggravation were also effective predictors, even after controlling for the child's emotionality as a possible determinant of maternal attitudes. It is argued that the results with the maternal attitude measures provide support for the hypothesis that maternal behavior is a contributor to the development of self-regulation.This research was supported by a State of Ohio Academic Challenge Grant to the Bowling Green State University Clinical Psychology Program, and by a Basic Grant awarded to the first author by the Bowling Green State University Faculty Research Committee. The authors are grateful to Eric Dubow, Douglas Ullman, and two anonymous reviewers for their helpful comments and criticisms on previous versions of this article.     

A longitudinal study of the development of spatial conceptual ability

During October and November of 1983, three subsamples were selected from three schools in Mesa, Arizona: 34 students in 6th grade, 34 students in 8th grade, and 34 students in 10th grade. A battery of Piagetian-type tasks were individually and randomly administered to each subject. Seven tasks examined projective spatial conceptual abilities, and three tasks examined Euclidean abilities. The same battery of tasks was again administered to the same subjects during November and December of 1984 when all the subjects were in the next grade, that is, 7th, 9th, and 11th. Because of attrition, the number of students tested during the second year were 33, 30, and 28, respectively. To test for significant differences between grade levels, a chi-square one-sample procedure was used. Out of a possible 50 tasks, significant differences were detected in 36 (72%). Those findings, along with an examination of the percentage of students passing each task, support the notion of sequential development of spatial conceptual abilities.     

Gesture and early bilingual development

The relationship between speech and gestural proficiency was investigated longitudinally (from 2 years to 3 years 6 months, at 6-month intervals) in 5 French-English bilingual boys with varying proficiency in their 2 languages. Because of their different levels of proficiency in the 2 languages at the same age, these children's data were used to examine the relative contribution of language and cognitive development to gestural development. In terms of rate of gesture production, rate of gesture production with speech, and meaning of gesture and speech, the children used gestures much like adults from 2 years on. In contrast, the use of iconic and beat gestures showed differential development in the children's 2 languages as a function of mean length of utterance. These data suggest that the development of these kinds of gestures may be more closely linked to language development than other kinds (such as points). Reasons why this might be so are discussed.     

A longitudinal study of the relation between language and theory-of-mind development.

Fifty-nine 3-year-olds were tested 3 times over a period of 7 months in order to assess the contribution of theory of mind to language development and of language to theory-of-mind development (including the independent contributions of syntax and semantics). Language competence was assessed with a standardized measure of reception and production of syntax and semantics (the Test of Early Language Development). Theory of mind was assessed with false-belief tasks and appearance-reality tasks. Earlier language abilities predicted later theory-of-mind test performance (controlling for earlier theory of mind), but earlier theory of mind did not predict later language test performance (controlling for earlier language). These findings are consistent with the argument that language is fundamental to theory-of-mind development.     

Early cognitive profiles of emergent readers: a longitudinal study

This longitudinal study examined the contribution of phonological awareness, phonological memory, and visuospatial ability to reading development in 142 English-speaking children from the start of kindergarten to the middle of Grade 2. Partial cross-lagged analyses revealed significant relationships between early performance on block design and matching letter-like forms tasks and later reading ability. Rhyme awareness correlated with later reading ability during the earliest stages, but onset awareness did not emerge as important until after the children had started reading. Digit span correlated significantly with future reading ability at every stage. These findings indicate that although phonological awareness, phonological memory, and visuospatial ability are all necessary for emergent reading, their relative importance varies across the first 2 years of reading development.     

A cognitive development framework

Prominent stage theories of cognitive development show evidence of a structure in which each stage contains a number of subsidiary levels. Comparisons of the stages in these theories have commonly been made through the established links with stages of Piaget’s theory. In response to Kagan’s criticism of Piaget’s theory, features of these developmental theories were used in this paper as the basis for a general framework of interactive stages and levels of cognitive operations. Some implications of the proposed framework in relation to cognitive development theories and directions for further research are examined. Further application of this framework could help to identify commonalities in cognitive operations across different contents, contexts and cultures.     

A cognitive development framework

Prominent stage theories of cognitive development show evidence of a structure in which each stage contains a number of subsidiary levels. Comparisons of the stages in these theories have commonly been made through the established links with stages of Piaget’s theory. In response to Kagan’s criticism of Piaget’s theory, features of these developmental theories were used in this paper as the basis for a general framework of interactive stages and levels of cognitive operations. Some implications of the proposed framework in relation to cognitive development theories and directions for further research are examined. Further application of this framework could help to identify commonalities in cognitive operations across different contents, contexts and cultures.     

A longitudinal study of children's depressive symptoms, self-perceptions, and cognitive distortions about the self

This longitudinal study examined how depressive symptoms relate to children's self-perceptions and to estimates of children's cognitive distortions about the self in a nonclinical sample of children who were followed from 4th grade (n = 248) through 6th grade (n = 227). Report card grades measured children's academic competence, and teachers' ratings of children's level of peer acceptance at school indicated social acceptance. Self-reported depressive symptoms predicted a change in children's negative views of the self. Moreover, the self-perceptions of children who exhibited more symptoms of depression appeared to reflect an underestimation of their actual competence. Children's negative self-perceptions and underestimations about the self were not associated with a subsequent change in depressive symptoms. The implications of the findings for cognitive theories of depression and future research with this population are discussed.     

A longitudinal study of emotion expression and personality relations in early development.

To investigate emotion expression and personality relations, the authors coded infants' full-face and component positive and negative expressions during Episodes 4 through 8 of the strange situation procedure at age 18 months and obtained maternal ratings of the 5-factor model of personality when children were 3.5 years old. Full-face negative expression was directly related to Neuroticism and inversely related to Agreeableness and Conscientiousness. By contrast, component positive expression showed the exact opposite pattern of relations. Full-face positive expression was positively correlated with Extraversion and Openness to Experience. These findings indicate that full-face and component expressions may index different intensities of emotions. Emotion expression and personality relations were not mediated by the security of attachment continuum or the emotional reactivity dichotomy derived from the attachment subclassifications.     

A cognitive complexity metric applied to cognitive development

Two experiments tested predictions from a theory in which processing load depends on relational complexity (RC), the number of variables related in a single decision. Tasks from six domains (transitivity, hierarchical classification, class inclusion, cardinality, relative-clause sentence comprehension, and hypothesis testing) were administered to children aged 3-8 years. Complexity analyses indicated that the domains entailed ternary relations (three variables). Simpler binary-relation (two variables) items were included for each domain. Thus RC was manipulated with other factors tightly controlled. Results indicated that (i) ternary-relation items were more difficult than comparable binary-relation items, (ii) the RC manipulation was sensitive to age-related changes, (iii) ternary relations were processed at a median age of 5 years, (iv) cross-task correlations were positive, with all tasks loading on a single factor (RC), (v) RC factor scores accounted for 80% (88%) of age-related variance in fluid intelligence (compositionality of sets), (vi) binary- and ternary-relation items formed separate complexity classes, and (vii) the RC approach to defining cognitive complexity is applicable to different content domains.     

Disentangling the effects of cognitive development and linguistic expertise: a longitudinal study of the acquisition of English in internationally-adopted children

Early language development is characterized by predictable changes in the words children produce and the complexity of their utterances. In infants, these changes could reflect increasing linguistic expertise or cognitive maturation and development. To disentangle these factors, we compared the acquisition of English in internationally-adopted preschoolers and internationally-adopted infants. Parental reports and speech samples were collected for 1 year. Both groups showed the qualitative shifts that characterize first-language acquisition. Initially, they produced single-word utterances consisting mostly of nouns and social words. The appearance of verbs, adjectives and multiword utterances was predicted by vocabulary size in both groups. Preschoolers did learn some words at an earlier stage than infants, specifically words referring to the past or future and adjectives describing behavior and internal states. These findings suggest that cognitive development plays little role in the shift from referential terms to predicates but may constrain children's ability to learn some abstract words.     

The cognitive representation of political personalities. A cross-cultural comparison(1)

The cognitive representation of salient political personalities was studied in a British and a German student sample, using a multi-dimensional scaling (MDS) procedure. Separate MDS analyses for the two samples yielded a readily interpetable three dimensional stimulus space in each case. These cognitive spaces for political figures were interpreted as reflecting the attributes of political potency, evaluation and intelligence in the case of the British sample, and evaluation, conservatism and political potency in the case of the German sample. An additional joint analysis of data from both subject groups indicated significant cross-cultural differences in the cognitive representations of political leaders. The results were discussed in terms of the socio-cultural differences between the two subsamples, and the utility of a multi-dimensional approach to political perception and behaviour.     

Individual development: A longitudinal perspective

This report is a presentation of a longitudinal research programme which was established at the Department of Psychology, Stockholm University, in 1965 under the title of Individual Development and Adjustment (IDA). It briefly summarizes the interactional theoretical background and presents sub-projects on (a) biological maturation and social development in girls, (b) educational and occupational careers of girls, (c) social development in boys, and (d) biological factors and antisocial behaviour in a developmental perspective. Methodological and ethical issues are discussed and the importance of longitudinal research for understanding the process of individual development is strongly emphasized.