da Vinci's window facilitates drawings of total and partial occlusion in young children

When two or more objects are present in a scene, children 5 and 6 years of age rarely draw the scene such that one object totally or partially occludes another object. Instead they draw complete objects. The present study separated two components of drawing: perspective taking and graphic skill. Perspective taking was examined by comparing a free viewing condition with a restricted viewing condition in which a model could only be viewed through four apertures. Graphic skill was examined by comparing drawings requiring total occlusion with drawings requiring partial occlusion under both viewing conditions. Experiment 1 showed that 90% of 5- and 6-year-olds drew total occlusions under restricted viewing conditions but only 32% did so in the free viewing condition. Experiment 2 showed that drawings of partial occlusion were unaffected by viewing condition among 5-year-olds, but that restricted viewing increased the number of partial occlusions that 6-year-olds drew. Thus, failures of young children to draw occlusions have less to do with graphic skill than was previously thought. Instead, it is suggested that young children have a more general difficulty selecting one perspective and maintaining it over time.     

Emergence of representation in drawing: The relation between kinematic and referential aspects

To identify and characterize early instances in which children attribute meaning to their drawings, scribbles of 2- to 3-year-olds were examined from kinematic and representational perspectives. Scribbles were shown to be composed of smooth-inertial and angular-intentional curves, the former revealing a systematic relation between curvature and speed (the 2/ 3 power law). Children tended to attribute a-posteriori representational meanings (e.g., an airplane) to angular curves and nonrepresentational meanings (e.g., a line) to smooth curves, that they have just finished drawing. They did not do so with reference to scribbles drawn by peers, by themselves in the past, or by the experimenter who imitated their scribbling. Children's attribution of representational meanings increased with age. The phenomenon studied was discussed as a possible precursor of preplanned representational drawing, indicating the child's awareness of the symbolic function of a line—standing for itself and signifying a referent.     

Emergence of representational activity during the early drawing stage: process analysis

This study analyzed the process underlying the emergence of representational drawing. Eighty-seven children aged 1–3 years were asked to color or draw either a simple picture (P) or a contour for an object (DC) in a shared task. After that, they were asked to draw their mother on a blank sheet of paper in a no drawn contour task (NC). Whereas 1½- and 2-year-olds were more successful in the P task than in the DC task, the 2½- and 3-year-olds were successful in both. The 2-year-olds were better in the DC than the NC task. The results show that 1½- and 2-year-olds can extract the component parts of a drawing even though they cannot produce them and children over 2½ years old can organize these components into a drawing by themselves. These findings indicate that representational drawing is based on the extraction of the component parts and the acquisition of the drawing ability to combine the parts into a drawing and that the beginnings of representational drawing are found in 1½- and 2-year-old children.     

Attachment and early reading: a longitudinal study

The relationship between quality of attachment in infancy and preschooler's reading interests and skills was explored. At 24 months, 77 children and their mothers were tested using the Strange Situation procedure. In a follow-up study 3 years later, 65 mothers completed a questionnaire about the reading interests and skills of their children. Preschool teachers completed a questionnaire about preparatory reading instruction, and the children's intelligence was measured with the Leiden Diagnostic Test. After 3 years, the securely attached children showed more interest in written material than did the insecurely attached children, regardless of their intelligence and the amount of preparatory reading instruction.     

Trait-anxiety and sense of coherence: a longitudinal study

A study of trait-anxiety and sense of coherence on a group of medical students over 18 mo. shows that, although both characteristics are rather stable over time, the measure of sense of coherence is more sensitive to stressors than A-trait and is better predicted by A-trait than the opposite.     

Person-Environment Fit and its implications for personality development: a longitudinal study

Continuity and change in Person-Environment Fit (PE Fit) and its relation to personality development was studied in a 4-year longitudinal study of college students (N=305). PE Fit demonstrated moderate rank-order stability and small increases in mean-levels over time. Antecedents to PE Fit included gender (being male), high academic ability, low agreeableness, and low neuroticism. Outcomes associated with PE Fit included greater personality consistency and changes in personality in the direction of higher self-esteem and lower agreeableness and neuroticism. The implications of the findings for personality development are discussed.     

Gender characteristics and adjustment: a longitudinal study.

The present study used a prospective longitudinal design to investigate the long-term developmental implications of gender-related interests and traits. Archival data were available for Ss in the R. R. Sears, Maccoby, and Levin (1957) study. Men, who at age 12 endorsed interests and undesirable traits more typically associated with women, had poorer social-personal adjustment at ages 31 and 41. No effects were found for women. Feminine expressive traits at age 31 did not impact on 41-year-old adjustment for either men or women, whereas masculine instrumental traits were positively related for both. These findings support a multidimensional view of gender and indicate that harsher consequences follow when adolescent boys endorse nontraditional gender-related interests and undesirable traits than when girls do so.     

Stimulation seeking and intelligence: a prospective longitudinal study

The prediction that high stimulation seeking 3-year-olds would have higher IQs by 11 years old was tested in 1,795 children on whom behavioral measures of stimulation seeking were taken at 3 years, together with cognitive ability at 11 years. High 3-year-old stimulation seekers scored 12 points higher on total IQ at age 11 compared with low stimulation seekers and also had superior scholastic and reading ability. Results replicated across independent samples and were found for all gender and ethnic groups. Effect sizes for the relationship between age 3 stimulation seeking and age 11 IQ ranged from 0.52 to 0.87. Findings appear to be the first to show a prospective link between stimulation seeking and intelligence. It is hypothesized that young stimulation seekers create for themselves an enriched environment that stimulates cognitive development.     

Intimacy motivation and psychosocial adjustment: a longitudinal study

Longitudinal data of 57 middle-aged men from the Grant Study Adult Development were analyzed in terms of nine indices of psychosocial adjustment and four social motives: achievement, power, affiliation, and intimacy motivation. The Thematic Apperception Test (TAT), administered in 1950-52, was scored for the four motives. Psychosocial adjustment, determined by ratings made primarily with reference to life history data gathered between 1950 and 1967, was comprised of scores on income level, occupational promotion, occupational enjoyment, days of sick leave, marital enjoyment, regular vacations, pastimes with friends, drug or alcohol misuse, and psychiatric visits. High intimacy motivation at age 30 was significantly associated with better adjustment 17 years later. The results are discussed in terms of contemporary theories of psychosocial adaptation.     

Gerstmann syndrome without aphasia: a longitudinal study

A case of "pure" and complete Gerstmann syndrome resulting from a focal vascular lesion in the posterior parietal area of the left hemisphere and not associated with aphasic disorder or general mental impairment is described. The initial symptom presentation of this patient supported the concept of the autonomous nature of the Gerstmann aggregate but longitudinal findings suggested that these symptoms did not in fact represent a coherent syndrome.     

Structuring of early reaching movements: a longitudinal study

Reaches, performed by 5 infants, recorded at 19 weeks of age and every third week thereafter until 31 weeks of age, were studied quantitatively. Earlier findings about action units were confirmed. At all ages studied, movements were structured into phases of acceleration and deceleration. Reaching trajectories were found to be relatively straight within these units and to change direction between them. It was also found that at all ages, there was generally one dominating transport unit in each reach. The structuring of reaching movements changed in four important ways during the period studied. First, the sequential structuring became more systematic with age, with the dominating transport unit beginning the movement. Second, the duration of the transport unit became longer and covered a larger proportion of the approach. Third, the number of action units decreased with age, approaching the two-phase structure of adult reaching. Finally, reaching trajectories became straighter with age.     

Body evaluation and coital onset: a population-based longitudinal study

This study examined the temporal relationship between body evaluation and coital onset. In a population-based longitudinal study, 1449 Norwegian girls and boys between 12 and 15 years of age were followed at 4 waves over a span of 13 years. Body evaluation was used in order to predict coital onset besides romantic appeal and psychological problems. For girls early in adolescence, body evaluation did not influence the probability of coital onset during the first 2-year period. In the subsequent 5-year period, body dissatisfaction increased the probability for coital onset when romantic appeal was held constant. Body evaluation did not influence the odds of coital onset among boys. The findings imply that the pattern of association between body evaluation and coital onset differs according to the timing of coital onset for girls. Future research needs to distinguish body image from romantic appeal in relation to first time sexual experiences.     

Coin value and perceived size: a longitudinal study.

Decimalization of the Irish currency presented an opportunity to study the perceived size of coins as they were introduced or withdrawn and to examine the accentuation of differences between coins. Estimates were obtained of the sizes of 4 coins from 478 subjects in 3 groups tested at different times: just after decimalization, 2, or 3 yr. later. A newly introduced coin was significantly underestimated in size at first but came to be significantly overestimated later, while all familiar coins were always significantly overestimated. The amount of overestimation of a coin depended on its value, not its size, leading to an accentuation of the difference between any two coins if the larger coin was also the more valuable but sometimes to the opposite if the smaller coin were of higher value than the larger member of the pair.     

Union commitment and participation: a 10-year longitudinal study

The authors longitudinally investigated the causal nature of the relationship between union commitment and participation in informal union activities. A total of 134 members of the National Association of Letter Carriers were studied over a 10-year period. Using cross-lagged regression analysis, early union commitment was found to predict the level of informal union participation 10 years later. The reverse and reciprocal relationships were not supported. These findings support and extend earlier research on the causal nature of the short-term relationship between union commitment and participation. The implications of the findings for researchers and labor unions are discussed.     

Maternal perceptions and adolescent self-esteem: a six-year longitudinal study

A six-year longitudinal study investigated the development of self-esteem in relation to mother's child-rearing attitudes, role satisfaction, and perceived temperament of the child. Participants were two age cohorts of girls and boys from the Cardiovascular Risk in Young Finns study, being 6 (n = 416) and 9 years old (n = 408) at the beginning of the study (baseline). Scores regarding mother's hostile child-rearing attitudes, mother's low role satisfaction, and maternal perceptions of child's difficult temperament (high activity, negative emotionality, and low cooperativeness) were obtained at baseline and three years later. Self-esteem was measured by self-reports six years later, at the ages of 12 and 15. The results indicated considerable gender differences. Among girls nearly all childhood variables individually predicted self-esteem, whereas among boys the associations were less evident. Additionally, perceived difficult temperament at baseline predicted hostile child-rearing attitudes at first follow-up, which further predicted low self-esteem among girls only.