Response Time Adjustment in the Stop Signal Task: Development in Children and Adolescents

Adjusting speed to maintain fast and accurate performance is critical to goal-directed behavior. This study examined development of response time adjustments in the stop signal task in 13,709 individuals aged 6–17 years (49.0% Caucasian) across four trial types: correct and incorrect go, successful (stop-inhibit), and failed (stop-respond) trials. People sped more after correct than incorrect go responses and slowed more after failed than successful stop trials. Greater slowing after stop-respond but less slowing after stop-inhibit trials was associated with better response inhibition. Response time adjustments were evident in children as young as age 6, developed throughout childhood, and plateaued by age 10. Results were consistent with the predictions of the error detection and shifting goal priority hypotheses for adjustments.     

Child Care in Infancy and Cognitive Performance Until Middle Childhood in the Millennium Cohort Study

This study used a British cohort (n = ～13,000) to investigate the association between child care during infancy and later cognition while controlling for social selection and missing data. It was found that attending child care (informal or center based) at 9 months was positively associated with cognitive outcomes at age 3 years, but only for children of mothers with low education. These effects did not persist to ages 5 or 7 years. Early center‐based care was associated with better cognitive outcomes than informal care at ages 3 and 5 years, but not at 7 years. Effect sizes were larger among children whose mother had low education. Propensity score matching and multiple imputation revealed significant findings undetected using regression and complete‐case approaches.     

Neural Correlates of Performance Monitoring During the Transition to Young Adulthood

Cognitive challenges during transition to adulthood are generally high and require particular skills, such as self‐control, performance evaluation, and behavioral adjustment for success in everyday living. However, age and sex differences in timing and efficiency of brain maturational processes in the early twenties are not well known. We used a go/no‐go paradigm and fMRI to focus on the neural processes underlying response inhibition and performance monitoring during the transition from late adolescence (aged 18–19) to young adulthood (aged 23–25). During performance monitoring, late adolescents showed more activation in right inferior frontal gyrus than young adults, while males showed more activation in left inferior parietal lobe than females. No effects of age and sex were found for response inhibition. Our findings suggest that age and sex‐related differences in neural basis of performance monitoring continue to change between late adolescence and young adulthood.     

A Developmental Eye Tracking Investigation of Cued Task Switching Performance

Children perform worse than adults on tests of cognitive flexibility, which is a component of executive function. To assess what aspects of a cognitive flexibility task (cued switching) children have difficulty with, investigators tested where eye gaze diverged over age. Eye-tracking was used as a proxy for attention during the preparatory period of each trial in 48 children ages 8–16 years and 51 adults ages 18–27 years. Children fixated more often and longer on the cued rule, and made more saccades between rule and response options. Behavioral performance correlated with gaze location and saccades. Mid-adolescents were similar to adults, supporting the slow maturation of cognitive flexibility. Lower preparatory control and associated lower cognitive flexibility task performance in development may particularly relate to rule processing.     

Inhibitory Control During Emotional Distraction Across Adolescence and Early Adulthood

This study investigated the changing relation between emotion and inhibitory control during adolescence. One hundred participants between 11 and 25 years of age performed a go‐nogo task in which task‐relevant stimuli (letters) were presented at the center of large task‐irrelevant images depicting negative, positive, or neutral scenes selected from the International Affective Picture System. Longer reaction times for negative trials were found across all age groups, suggesting that negative but not positive emotional images captured attention across this age range. However, age differences in accuracy on inhibitory trials suggest that response inhibition is more readily disrupted by negative emotional distraction in early adolescence relative to late childhood, late adolescence, or early adulthood.     

Temperament and the Cognitive Modifiability of Academically Superior Black Adolescents in South Africa

TEMPERAMENT is characterised as the relatively stable dimension of human functioning, while intelligence is increasingly seen as a dynamic process. This study investigated the relationship between temperament and cognitive modifiability in an academically successful but disadvantaged South African population. For 92 adolescents in the Soweto Gifted Child Programme, the relationship was determined between their ratings on the Teacher Temperament Questionnaire and their performance on the Learning Potential Assessment Device and other measures of cognitive ability and learning. The Task Orientation and Personal‐Social Flexibility temperament dimensions were directly related to learning, academic performance and cognitive change. A more complex relationship was suggested for the Reactivity dimension, in that more intense and reactive subjects tended to perform better in unstimulating situations, while under more facilitative learning conditions, a higher performance level tended to be associated with a lower reactivity level. The findings support the possibility of an interaction between temperament and cognitive growth and demonstrate the usefulness of considering these individual difference variables in combination with each other.     

The genetic and environmental origins of learning abilities and disabilities in the early school years

Despite the importance of learning abilities and disabilities in education and child development, little is known about their genetic and environmental origins in the early school years. We report results for English (which includes reading, writing, and speaking), mathematics, and science as well as general cognitive ability in a large and representative sample of U.K. twins studied at 7, 9, and 10 years of age. Although preliminary reports of some of these data have been published, the purpose of this monograph is to present new univariate, multivariate, and longitudinal analyses that systematically examine genetic and environmental influences for the entire sample at all ages for all measures for both the low extremes (disabilities) and the entire sample (abilities). English, mathematics, and science yielded similarly high heritabilities and modest shared environmental influences at 7, 9, and 10 years despite major changes in content across these years. We draw three conclusions that go beyond estimating heritability. First, the abnormal is normal: Low performance is the quantitative extreme of the same genetic and environmental influences that operate throughout the normal distribution. Second, continuity is genetic and change is environmental: Longitudinal analyses suggest that age-to-age stability is primarily mediated genetically, whereas the environment contributes to change from age to age. Third, genes are generalists and environments are specialists: Multivariate analyses indicate that genes largely contribute to similarity in performance within and between the three domains--and with general cognitive ability--whereas the environment contributes to differences in performance. These conclusions have far-reaching implications for education and child development as well as for molecular genetics and neuroscience.     

The relation of child care to cognitive and language development. National Institute of Child Health and Human Development Early Child Care Research Network

Children from 10 sites in the United States were followed from birth to age 3 to determine how experiences in child care relate to cognitive and language development (Ns varied between 595 and 856, depending on the assessment). Multiple assessments of family and child care environments and of cognitive and language competence were collected. Analyses that adjusted for maternal vocabulary score, family income, child gender, observed quality of the home environment, and observed maternal cognitive stimulation indicated that the overall quality of child care, and language stimulation in particular, was consistently but modestly related to cognitive and language outcomes at ages 15, 24, and 36 months. The effect sizes for high (top quartile) versus low (bottom quartile) quality ranged from .18 to .48. After adjusting for child care quality, cumulative experience in center-based care was associated with better outcomes than was participation in other types of care. The amount of time children spent in care was not related to outcomes. Children in exclusive maternal care did not differ systematically from children in child care. Tests for lagged relations of earlier child care experiences to later performance (adjusting for current child care) showed that language stimulation predicted subsequent cognitive and language performance 9 to 12 months later. Although children in center care at age 3 performed better than children in other types of care, earlier experience in child care homes was associated with better performance at age 3 than was experience in other types of care. The relations of child care variables to outcomes did not vary consistently as a function of family income, quality of home environment, child gender, or ethnic group.     

Two-choice,observational learning and reversal in the rat: S-S versus S-R effects

In Experiment 1, male rats were trained to press both bars in a two-choice apparatus and were then given observational training of a go/no-go discrimination in which the observed operation of two inaccessible, dissimilar bars by a hidden experimenter constituted S+ and S?. After discrimination was established, individual rats were permitted access to the two bars. Six of the seven rats consistently pressed the S+ bar on 10 test trials, but failed to reverse bar preference after observational training was reversed. In Experiment 2, nine naive males received the same observational training as in Experiment 1, but without any pretraining to press either bar. All rats pressed the S+ bar on initial test and did so consistently throughout the 10 trials. Six of these rats received reversal training of the go/no-go discrimination after the 10 test trials. As in Experiment 1, all rats failed to press the new S+ bar. However, five of six rats in another group, which received reversal trainingprior to any test trials, did reverse and press the new S+ bar. In Experiment 3, controls for possible confounding effects of overtraining trials were conducted. These manipulations had no effect; the rats tested before reversal still failed to press the S+ bar, and the rats reversed before testing all reversed or pressed the most recent S+ bar. That is, S-R learning predominated over S-S learning if active, though unreinforced, responding to a particular bar intervened. In contrast, however, a cognitive (S-S) interpretation of directed response learning was supported by the results of Experiment 4, in which the rats that learned the go/no-go discrimination without responding (only by auditory and light cues) failed to press the S+ bar consistently.     

RELATIONSHIP BETWEEN FORMAL EDUCATION AND COGNITIVE FUNCTIONING: A HISTORICAL PERSPECTIVE

The influence of educational level on the intellectual performance of elderly individuals has been noted both in terms of intra‐ and inter‐generational differences. A number of studies are consistent in demonstrating that even at advanced ages, test scores are at least partially correlated with educational level. Thus, the relatively lower educational status of older cohorts could for several different reasons account for at least part of the apparent decline in intellectual functioning with age. For example, the average number of years of education is different today than it was 50 years ago. In addition, the comparability of the same levels ‘of education obtained at different points in time is questionable since even the content has changed. The fact that the opportunity to continue one's education exists as a realistic option is another distinguishing feature between today's high school graduates and those of 50 years ago. Thus, what may appear to be age differences may actually be a result of sociocultural and historical factors rather than ontogenetic change. When these factors are taken together with the longitudinal data on well‐educated adults who show little or no intellectual decline, the notion of universal decline in intelligence with age comes into question. Furthermore, recent evidence demonstrating that most elderly can perform well on intellectual measures given the appropriate contextual factors suggests that older individuals have considerably more intellectual potential than has previously been reported. Therefore, as successive cohorts receive greater educational opportunities, the negative stereotype of intellectual deterioration with age may no longer be accurate.     

Associations Among Pubertal Development,Empathic Ability,and Neural Responses While Witnessing Peer Rejection in Adolescence

Links among concurrent and longitudinal changes in pubertal development and empathic ability from ages 10 to 13 and neural responses while witnessing peer rejection at age 13 were examined in 16 participants. More advanced pubertal development at age 13, and greater longitudinal increases in pubertal development, related to increased activity in regions underlying cognitive aspects of empathy. Likewise, at age 13 greater perspective taking related to activity in cognitive empathy‐related regions; however, affective components of empathy (empathic concern and personal distress) were associated with activity in both cognitive and affective pain‐related regions. Longitudinal increases in empathic ability related to cognitive and affective empathy‐related circuitry. Findings provide preliminary evidence that physical and cognitive‐emotional development relate to adolescents' neural responses when witnessing peer rejection.     

Social withdrawal,observed peer acceptance,and the development of self-perceptions in children ages 4 to 7 years

Children who think poorly about themselves are considered at-risk for a myriad of negative outcomes. Thus, it is important to explore possible origins of such cognitions, particularly in young children. The purpose of this study was to examine the relations between various nonsocial behaviors (i.e., reticence and social withdrawal), observed peer acceptance at ages 4 and 7 years, and self-perceptions at age 7 years in both boys and girls, respectively.Participants included 163 children (89 females, 74 males) who were seen at age 4 and then again at age 7 years. For girls, results revealed that nonsocial behavior (both reticence and solitary-passive withdrawal) was negatively related to observed peer acceptance at both ages 4 and 7, and peer acceptance, as early as 4 years of age, was found to influence self-perceptions of competence at age 7 years. For boys, results revealed that (a) reticence at age 7 predicted negatively to perceived peer acceptance, perceived physical and perceived cognitive competence at age 7 years, (b) solitary-passive withdrawal at age 4 predicted positive cognitive self-perceptions at age 7, and (c) solitary-passive withdrawal at age 7 predicted negatively to perceived peer acceptance and perceived physical competence at age 7 years.     

Marital Conflict,Allostatic Load,and the Development of Children's Fluid Cognitive Performance

Relations between marital conflict, children's respiratory sinus arrhythmia (RSA), and fluid cognitive performance were examined over 3 years to assess allostatic processes. Participants were 251 children reporting on marital conflict, baseline RSA, and RSA reactivity (RSA‐R) to a lab challenge were recorded, and fluid cognitive performance was measured using the Woodcock–Johnson III. A cross‐lagged model showed that higher levels of marital conflict at age 8 predicted weaker RSA‐R at age 9 for children with lower baseline RSA. A growth model showed that lower baseline RSA in conjunction with weaker RSA‐R predicted the slowest development of fluid cognitive performance. Findings suggest that stress may affect development of physiological systems regulating attention, which are tied to the development of fluid cognitive performance.     

ADU LT COGNITIVE STYLES AND TEST PERFORMANCE

Ninety adult males ages 25 to 58 were individually tested with three cognitive style measures: the Estimation Scale (ES), a measure of category width; the Matching Familiar Figures (MFF) Test; and the Hidden Figures Test (HFT). Multiple correlations were performed between the three cognitive style measures and the standardized scores from the Chartered Life Underwriter (CLU) area achievement examinations. The results of this analysis indicated that only MFF error scores produce a significant correlation with CLU exam performance. Further analyses conducted on the MFF data indicated that there was a significant negative correlation between response latencies and errors, there was a significant positive correltation between response latency and age, and reflective subjects had significantly higher mean CLU scores than did impulsive subjects. It was concluded that error scores on the MFF are a better predictor of test performance than are latencies. This conclusion was consistent with other studies that have found error scores to be more strongly related to personality variables and performance on other cognitive style than latencies prove to be.     

Early Intervention and Mediating Processes in Cognitive Performance of Children of Low-Income African American Families

This longitudinal study of 161 African American children from low-income families examined multiple influences, including early childhood interventions and characteristics of the child and family, on longitudinal patterns of children's cognitive performance measured between 6 months and 8 years of age. Results indicate that more optimal patterns of cognitive development were associated with intensive early educational child care, responsive stimulating care at home, and higher maternal IQ. In accordance with a general systems model, analyses also suggested that child care experiences were related to better cognitive performance in part through enhancing the infant's responsiveness to his or her environment. Maternal IQ had both a direct effect on cognitive performance during early childhood and, also, an indirect effect through its influence on the family environment.     

Cohort analysis of writing in Year 7 following two,four and seven years of the National Literacy Strategy

At 11 years of age, English students in secondary schools are expected to make no more than five spelling errors per 100 words and write at a speed of 25 words per minute in order to cope with the curriculum. This research found that at least one third of the Year 7 cohorts (ages 11–12) in three typical suburban secondary schools were unable to meet the spelling criterion and 12% or more were so poor they were in the dyslexic category. Over 95% could not meet the handwriting speed criterion and boys were more than 10% slower than girls. Fluency and speed in writing are essential underpinning skills contributing to spelling accuracy and compositional ability in examination performance. Their role in underachievement across the ability range appears greater than suspected for the difficulties observed so far go far wider than amongst children identified with SEN, such as those with dyslexia and developmental co‐ordination difficulties (DCD), sometimes called dyspraxia. Interventions which teachers in general might undertake are indicated. The research is ongoing.     

Type of Feedback and Young Children's Performance on Computer Presented Reading Readiness Activities

Summary Forty children, between the ages of three years ten months and four years six months and with a mean age of four years three months, did computer‐presented reading‐readiness activities under different pre‐activity and feedback conditions. The children were randomly allocated within sexes to four groups. Group 1 listened to a story which involved a teddy bear character called BJ Bear and then did reading‐readiness activities such that the smiling face of the bear appeared on the screen and a tune played when they responded correctly, and the sad face of the bear when they were incorrect. Group 2 listened to the story and then did the activities with the smiling face of the bear and a tune when correct, but with nothing when they were wrong. Group 3 did not receive the story, but did the activities with both the smiling face of the bear and a tune when correct, and the sad face of the bear when incorrect. Group 4 also did not receive the story and did the activities with the smiling face of the bear and a tune when correct, but with nothing when they were wrong. Overall it was found that children did significantly better if given the story about BJ before the activities. There was also a significant interaction between the story condition, feedback for incorrect responses and sex such that performance was better for all with‐story groups except in the case of boys with no feedback.     

Tracing Differential Pathways of Risk: Associations Among Family Adversity,Cortisol, and Cognitive Functioning in Childhood

Guided by family risk and allostasis theoretical frameworks, the present study utilized a prospective longitudinal design to examine associations among family risk experiences, basal cortisol patterns, and cognitive functioning in children. The sample included 201 low‐income children living within a midsize city in the Northeastern United States. Children were assessed at ages 2, 3, and 4 years. Growth‐mixture modeling analyses revealed three basal cortisol patterns (elevated, moderate, low) and these remained relatively stable across time. Exposure to greater levels of family instability and maternal unresponsiveness predicted elevated and low cortisol patterns, which were associated with lower child cognitive functioning at age 4. Findings have implications for family risk processes that may underlie risk‐related disparities in child cognitive outcomes.     

Development of auditory event-related potentials in young children and relations to word-level reading abilities at age 8 years

A relationship between brain responses at birth and later emerging language and reading skills have been shown, but questions remain whether changes in brain responses after birth continue to predict the mastery of language-related skills such as reading development. To determine whether developmental changes in the brain-based perceptual skills are systematically related to differences in word-level reading proficiency at age 8 years, brain event-related potentials (ERPs) to speech and nonspeech stimuli were recorded annually at the ages of 1 through 8 years in a sample of 109 typically developing children. Two measures of word-level reading (one that requires decoding of real words and one of pseudowords) were administered at age 8 years. Growth curve analysis, using the hierarchical linear models, related reading performance (average versus low) to the longitudinal maturation in the ERP waveform peak and latencies. Maturational changes (e.g., slope, acceleration, and cubic growth) in N1 amplitude from ages 1 to 4 were related to proficiency in decoding pseudoword stimuli only, with children who were less proficient in decoding pseudowords evidencing more steeply negative declines in amplitude with age, particularly at the frontal and parietal recording sites in response to both speech and nonspeech stimuli. In contrast, proficiency in decoding real words was related to developmental changes in N2 amplitudes from ages 4 to 8 only at the parietal recording site, and only in response to nonspeech stimuli. The early development of biologically based differences in the perception and processing of auditory information contributes to later group differences in reading proficiencies at school age.     

Spanking and Child Development During the First 5 Years of Life

Using data from the Fragile Families and Child Wellbeing Study (N = 3,870) and cross‐lagged path analysis, the authors examined whether spanking at ages 1 and 3 is adversely associated with cognitive skills and behavior problems at ages 3 and 5. The authors found spanking at age 1 was associated with a higher level of spanking and externalizing behavior at age 3, and spanking at age 3 was associated with a higher level of internalizing and externalizing behavior at age 5. The associations between spanking at age 1 and behavioral problems at age 5 operated predominantly through ongoing spanking at age 3. The authors did not find an association between spanking at age 1 and cognitive skills at age 3 or 5.