Showing papers by "Michael Rutter published in 1998"

A clinicopathological study of autism.

Abstract: A neuropathological study of autism was established and brain tissue examined from six mentally handicapped subjects with autism. Clinical and educational records were obtained and standardized diagnostic interviews conducted with the parents of cases not seen before death. Four of the six brains were megalencephalic, and areas of cortical abnormality were identified in four cases. There were also developmental abnormalities of the brainstem, particularly of the inferior olives. Purkinje cell number was reduced in all the adult cases, and this reduction was sometimes accompanied by gliosis. The findings do not support previous claims of localized neurodevelopmental abnormalities. They do point to the likely involvement of the cerebral cortex in autism.

Developmental Catch-up, and Deficit, Following Adoption after Severe Global Early Privation

Abstract: The extent of developmental deficit and catch-up following adoption after severe global early privation was examined at 4 years in a sample of 111 Romanian children who came to the U.K. before the age of 2 years, and compared with respect to their functioning at the same age to a sample of 52 U.K. adopted children placed before the age of 6 months. The measures at 4 years included height, head circumference, and general cognitive level (assessed on both the McCarthy and Denver Scales). The children from Romania were severely developmentally impaired at the time of U.K. entry, with about half below the third percentile on height, on weight, on head circumference, and on developmental quotient. Many were also in a poor physical state with recurrent intestinal and respiratory infections. The catch-up in both physical growth and cognitive level appeared nearly complete at 4 years for those children who came to the U.K. before the age of 6 months, despite the fact that their background prior to U.K. entry was similar to the children who came to the U.K. when older. The developmental catch-up was also impressive, but not complete, in those placed after 6 months of age. The mean McCarthy General Cognitive Index was 92 compared with 109 for the within-U.K. adoptees. The strongest predictor of level of cognitive functioning at 4 years was the children's age at entry to the U.K. It was concluded that the remaining cognitive deficit was likely to be a consequence of gross early privation, with psychological privation probably more important than nutritional privation. A further follow-up at age 6 years will determine whether there is continuing recovery after 4 years.

Antisocial behavior by young people.

Abstract: 1 Introduction 2 Identifying the most useful research 3 Concepts and measures of crime 4 Historical trends 5 Varieties of antisocial behaviour 6 The role of individual features 7 The role of psychosocial features 8 Society-wide influences 9 Gender differences 10 From child to adult: persistence and desistance 11 Prevention and intervention I: principles and concepts: application at the predelinquency stage 12 Prevention and intervention II: applications at the postdelinquency phase 13 Conclusions

A full genome screen for autism with evidence for linkage to a region on chromosome 7q International Molecular Genetic Study of Autism Consortium

Abstract: Autism is characterized by impairments in reciprocal social interaction and communication, and restricted and stereotyped patterns of interests and activities. Developmental difficulties are apparent before 3 years of age and there is evidence for strong genetic influences most likely involving more than one susceptibility gene. A two-stage genome search for susceptibility loci in autism was performed on 87 affected sib pairs plus 12 non-sib affected relativepairs, from a total of 99 families identified by an international consortium. Regions on six chromosomes (4, 7, 10, 16, 19 and 22) were identified which generated a multipoint maximum lod score (MLS) > 1. A region on chromosome 7q was the most significant with an MLS of 3.55 near markers D7S530 and D7S684 in the subset of 56 UK affected sib-pair families, and an MLS of 2.53 in all 87 affected sib-pair families. An area on chromosome 16p near the telomere was the next most significant, with an MLS of 1.97 in the UK families, and 1.51 in all families. These results are an important step towards identifying genes predisposing to autism; establishing their general applicability requires further study.

Genotype-environment correlations in late childhood and early adolescence: antisocial behavioral problems and coercive parenting.

Abstract: A key question for understanding the interplay between nature and nurture in development is the direction of effects in socialization. A longitudinal adoption design provides a unique opportunity to investigate this issue in terms of genotype-environment correlations for behavioral problems. As part of the Colorado Adoption Project, adopted children were classified as being at genetic risk (N = 38) or not at genetic risk (N = 50) for antisocial behavior based on their biological mothers' self-report history of antisocial behavior collected prior to the birth of the child. From age 7 through age 12, adoptive parents reported on the negative control, positive parenting, and inconsistent parenting they use in managing their child's behavior. Repeated measures analysis of variance indicated that children at genetic risk were consistently more likely to receive negative parenting from their adoptive parents than children not at genetic risk, indicating an evocative genotype-environment correlation. However, the findings also showed that most of the association between negative parenting and children's externalizing behavior was not explicable on the basis of an evocative gene-environment correlation and that an additional environmentally mediated parental effect on children's behavior was plausible.

Autism, affective and other psychiatric disorders: patterns of familial aggregation

Abstract: Background. The liability to autism confers a risk for a range of more subtle autistic-like impairments, but it remains unclear whether it also confers a risk for other psychiatric disturbances.Methods. To investigate this, we studied the pattern of familial aggregation of psychiatric disorders in relatives of 99 autistic and 36 Down's probands, using family history and direct interview measures.Results. Family history data showed that motor tics, obsessive–compulsive (OCD) and affective disorders were significantly more common in relatives of autistic probands and that individuals with OCD were more likely to exhibit autistic-like social and communication impairments. Direct interview data confirmed the increased rate of affective disorders (especially major depressive disorder) in the first-degree relatives. There was no evidence to indicate significant co-morbidity between affective disorders and the broadly defined phenotype of autism. Moreover, the characteristics of the probands' and the relatives' that were associated with the liability to familiality of the broader phenotype of autism differed from those that predicted the liability to the familiality of affective disorders. Examination of the onset of affective disorders suggested that the increased risk was not confined to the period following the birth of the child with autism.Conclusions. Overall, the results indicated that OCD, but not affective disorders, may index an underlying liability to autism. They also indicated that the increased risk of affective disorders was not solely the consequence of the stress of raising a child with autism and that further research will be required to clarify the mechanisms involved.

Assortative mating for major psychiatric diagnoses in two population-based samples

Abstract: Background. Previous studies on assortment for psychiatric disorders have reported discrepant findings. We aimed to test whether there is a significant association for psychiatric diagnoses, including alcoholism, generalized anxiety disorder, major depressive disorder, panic disorder and phobias between husbands and wives in two population-based samples. We further evaluated whether marital resemblance occurs primarily within or across psychiatric disorders and if assortment for psychopathology is primary or secondary to assortment for correlated variables. Methods. A model for mate selection addressed whether the correlation between mates for psychiatric disorders arises from direct assortment (primary homogamy) or through correlation with other variables for which assortment occurs (secondary homogamy) or through cross-variable assortment. The model accounted for within-person co-morbidity as well as across-spouse data. Results. Findings suggested that a moderate degree of assortment exists both within and across psychiatric diagnoses. Only a small amount of the observed marital resemblance for mental illness could be explained by assortment for correlated variables such as age, religious attendance and education. Similar results were obtained for the two samples separately and confirmed in their joint analysis, revealing that the co-morbidity and assortment findings, except for the marital correlation for age, religious attendance and education, replicate across samples. Conclusions. Significant but moderate primary assortment exists for psychiatric disorders. The bias in twin studies that have ignored the small amount of assortment is negligible.

Child Development, Molecular Genetics, and What to Do with Genes Once They Are Found

Abstract: Genes associated with behavioral dimensions and disorders are beginning to be identified. Although it is difficult and expensive to find genes associated with behavior, it is relatively easy and inexpensive to use genes that have already been identified. We describe how genes are found, but the main goal of this article is to outline what developmentalists can do with genes once they are found and, hence, to encourage the use of DNA markers in developmental research. We suggest that genes can be used to answer questions about developmental continuities, about psychopathological patterns, and about environmental risk mechanisms. Developmental questions include the causal mechanisms involved in heterotypic continuity. Questions on psychopathological patterns address heterogeneity (Do gene-behavior associations apply to disorders or to separate components representing risk or protective factors?), comorbidity (Are gene-behavior associations diagnosis-specific?), and the links between normality and disorder (Does a gene-behavior association for a disorder extend to related dimensions of normal variation and vice versa?). Questions about environmental risk mechanisms are informed by study of gene-environment interaction (Are individuals who are at genetic risk more sensitive to specific psychosocial risks?) and gene-environment correlation (Are individuals who are at genetic risk more likely to be exposed to psychosocial risk?).

Genetic influences on childhood hyperactivity: contrast effects imply parental rating bias, not sibling interaction

Abstract: Background Previous twin studies of hyperactivity have supported a 'contrast effect', whereby the more hyperactive the rating of one twin, the less the rating of the other. It has not been clear whether contrast effects occur in the twins' behaviour or in the ratings made of their behaviour but the implications for hyperactivity are different under the two models. Method We use hyperactivity ratings from mothers and teachers for 1644 twin pairs in the Virginia Twin Study of Adolescent Behavioral Development (VTSABD) to explore the origin of contrast effects, making use of independent teacher reports in a proportion of twins. Models were fitted separately for the two informants and jointly to ratings combined through a latent variable, using structural equation modelling. Results Models for maternal data confirm the contrast effect previously reported. Teacher ratings show a different form of bias, with both twin confusion and correlated errors representing alternative but not mutually exclusive explanations of the data. Latent variable modelling of the joint responses allowed comparison of a model in which the contrast effect was placed on maternal ratings, representing bias, versus one in which the contrast occurred in the underlying 'true' phenotype. The fit of the former model was significantly better. Conclusions Support is provided for the notion of contrast effects as a form of rater bias in maternal hyperactivity ratings. Different bias in teacher reports highlight that no one report can be considered a gold standard. The extent to which such biases may distort information for other data sources such as sib-pair studies of concordance/discordance is discussed.

Understanding intention in normal development and in autism

Abstract: This study aimed to establish whether or not young children and young people with autism can understand the mental state of intention. Participants were exposed to personal experience of unintended outcomes, to test if they could distinguish intended vs. unintended actions. Recognizing accidental outcomes was more difficult for normal 4-year-olds than 5-year-olds, and more difficult for young people with autism, compared with comparison groups. Such findings suggest that the theory of mind deficit observed in people with autism is not restricted to understanding epistemic states, but also extends to understanding intention. The results are also compatible with an action-monitoring deficit. Future research needs to test these two accounts against each other., 15 April 1996, 9 October 1997

The validity of parent-based assessment of the cognitive abilities of 2-year-olds

Abstract: Parent reports have been widely used to assess child behaviours in the socio-emotional domain, but seldom have been used to assess behaviours within the cognitive domain. The present study examines the ability of parent reports and parent-administered tasks obtained through the post to assess non-verbal cognitive abilities in early childhood. In a sample of 107 2-year-olds, age-corrected scores on parent reports and parent-administered tasks assessing non-verbal reasoning significantly predicted performance on the Mental Development Index (MDI) of the Bayley Scales of Infant Development-II two weeks later (r = .49 and r = .41, p < .0001, respectively). The multiple correlation between the two components and the MDI was .55 (p < .0001). This ability of parental assessments to predict the MDI is comparable to the predictive power of standard tester-administered measures at this age, even though the parent measure specifically excludes verbal items that are included in the MDI. Adding parent reports of language development significantly improved the prediction of the MDI (R = .66, p < .0001). In addition, higher within-domain than cross-domain correlations reflect a significant ability of parents to discriminate verbal and nonverbal abilities.

A comparative study of Greek children in long-term residential group care and in two-parent families: I. Social, emotional, and behavioural differences.

Abstract: The social, behavioural, and school adjustment of 41 9-year-old children in long-term residential group care in Greece was compared with that of children of the same sex and age brought up in two-parent families. Observational, interview, and questionnaire measures were employed. Observations in school classrooms showed that compared with their classmates, the group care children were more inattentive, participated less often in the classroom activities, were more likely to be passive, and tended to be involved in alternative and nonproductive activities. In the playground, they rarely interacted with non-institutional children. On both parent and teacher scales the group care children showed significantly more overall disturbance. The boys showed poor task involvement in the classroom and more emotional difficulties, conduct problems, and hyperactivity, whereas the between-group differences for girls were statistically significant only for emotional disturbance and poor task involvement in the classroom. Both boys and girls in long-term residential care showed less harmonious, confiding relationships with peers than those reared in families, and were more affection-seeking with teachers.

Some research considerations on intergenerational continuities and discontinuities: comment on the special section.

Abstract: Research into intergenerational continuities should pay attention to 9 key considerations: both sides of the family are involved, secular change will affect continuities, discontinuities outweight continuities, societal as well as family influences may be involved, variations in the meaning of traits must be considered, small differences may be misleading, risks may derive from either person characteristics or experiences, identification of mediating mechanisms is a priority, and such mechanisms may include genetic factors.

Continuities and Discontinuities in Antisocial Behavior from Childhood to Adult Life

Abstract: Much adult psychopathology has its roots in childhood difficulties; nowhere is that tendency more apparent than in the antisocial domain. From the time of the first long-term follow-ups (Robins, 1966, 1978) it has been clear that most severely antisocial adults have long histories of disruptive and deviant behavior reaching back to childhood. Yet these same studies also highlighted an apparent paradox: looking forward from childhood, the picture was a rather different one. Most conduct-disordered children did not grow up to be severely antisocial adults, and for many, discontinuity, rather than continuity, seemed the more usual course.

A Comparative Study of Greek Children in Long-term Residential Group Care and in Two-parent Families: II. Possible Mediating Mechanisms

Abstract: Forty-one children reared in group care were compared with 41 age- and sex-matched family care children according to interview, questionnaire, and observation measures of behavioural and scholastic functioning. Individual differences in outcome within the group care sample were examined in relation to a range of possible risk/protective indicators. The strongest predictor of outcome proved to be the reason for admission into residential care, with the implication that the outcome was best for children who had experienced stable, harmonious family relationships in their early years. The risk and protective effects applied to both the children's behaviour and scholastic attainments but, although the two were intercorrelated, neither accounted for the other. All subgroups of children in institutional care failed to show a lack of confiding peer relationships, with the pattern of findings suggesting that this stemmed from some aspect of experiences (possibly involving peer relationships) during residential care, as well as from discontinuity in caregiving during the early years.

Practitioner review : Routes from research to clinical practice in child psychiatry : Retrospect and prospect

Abstract: The last 40 years has seen a virtual revolution in both medical research and medical practice. Child psychiatry has been part of that revolution. The situation in the 1950s is briefly noted and seven examples are used to illustrate how causal research in the past has led to changes in clinical practice. The areas used as examples comprise: autism, hyperactivity/attention deficit syndromes, conduct disorders, depressive conditions, genetic research, organic brain dysfunction, and psychosocial risk processes. Prospects for the future with respect to the impact of research on clinical practice are discussed in relation to molecular genetics, environmental risks, cognitive and affective processing of experiences, links across the lifespan, and functional brain imaging. Attention is drawn to implications for training as well as for practice.

What can we learn from highly developed special skills

Abstract: Skills cannot be divided into the innate and the acquired. Also, genetic effects may not come into play until well after early childhood, and evocative gene-environment correlations are to be expected. Special talents are common in autism and warrant more detailed study, but whether they have the same meaning as talents in nonautistic individuals is not known.