Leslie Rescorla

Late-Emerging Reading Disabilities.

Literacy, language, and cognitive skills were compared for 35 4th5th graders with early-identified reading disabilities (RD), 31 with late-identified RD (first seen after 3rd grade), and 95 normally achieving students. Late-identified reading deficits were heterogeneous; some children were weak in both comprehension and word-level processing, whereas others had deficiencies in 1 component of reading but were unimpaired in the other. Although most reading skill deficits were about as severe for late- as for early-identified RD, and profiles of associated characteristics were similar, few of the former had yet been identified by their schools. Third-grade achievement, retrospectively examined, had been higher for the group with late-identified RD, suggesting that their reading difficulties were not just late identified but actually late emerging. A great deal of knowledge and understanding about children’s reading disabilities has been amassed over the past few decades. The focus of most research has been early-emerging difficulties that are identified prior to the fourth grade. As noted by Chall (1983), however, there also occurs a smaller “second wave” of students who appear to undergo a “fourth-grade slump” in reading achievement. There has been almost no investigation of the nature and severity of these less typical reading disabilities (RD) that emerge after the primary grades. In this study, we compared the reading and spelling abilities and literacy-related skills of children with early- versus late-emerging RD. In practice, during the elementary and middle school years, there is typically an increasing emphasis on reading comprehension in curricula, instruction, and assessments (Anderson, Hiebert,

The Generalizability of the Youth Self-Report Syndrome Structure in 23 Societies.

As a basis for theories of psychopathology, clinical psychology and related disciplines need sound taxonomies that are generalizable across diverse populations. To test the generalizability of a statistically derived 8-syndrome taxonomic model for youth psychopathology, confirmatory factor analyses (CFAs) were performed on the Youth Self-Report (T. M. Achenbach & L. A. Rescorla, 2001) completed by 30,243 youths 11-18 years old from 23 societies. The 8-syndrome taxonomic model met criteria for good fit to the data from each society. This was consistent with findings for the parent-completed Child Behavior Checklist (Achenbach & Rescorla, 2001) and the teacher-completed Teachers Report Form (Achenbach & Rescorla, 2001) from many societies. Separate CFAs by gender and age group supported the 8-syndrome model for boys and girls and for younger and older youths within individual societies. The findings provide initial support for the taxonomic generalizability of the 8-syndrome model across very diverse societies, both genders, and 2 age groups.

Ten-Year Comparisons of Problems and Competencies for National Samples of Youth Self, Parent, and Teacher Reports

The Youth Self-Report (YSR;Achenbach, 1995),Child Behavior Checklist (CBCL;Achenbach,2001),and Teachers Report Form (TRF; Achenbach & Rescorla, 2001) were used to compare U.S. national samples of 11- to 18-year-olds assessed in 1989 and 1999. Reports by all informants concurred in showing small improvements in competencies and adaptive functioning and small declines in problems from 1989 to 1999. Correlations of .98 to .99 between mean problem item scores in 1989 and 1999 indicated very high stability for assessment via self-reports, parent reports, and teacher reports over 10 years. Cross-informant correlations were (a) YSR × CBCL = .38, (b) CBCL ×TRF = .36, and (c) TRF ×YSR = .20. No scales showed significant differences between scores obtained from any type of informant for youths assessed shortly before and after the Columbine High School shootings.

Outcome of toddlers with specific expressive language delay

This article describes a follow-up of 25 boys diagnosed as having specific expressive language delay (SELD) in the 24- to 31-month age period. At the time of diagnosis, all subjects had Bayley MDI scores above 85, Reynell Receptive Language Age scores within 4 months of their chronological age, and Reynell Expressive Language Age scores at least 5 months below chronological age; most had vocabularies of fewer than 50 words and few if any word combinations. At follow-up, 16 boys were 3 years old, 7 were 3½, and 2 were 4 years of age. When seen for follow-up, half the 25 boys still had very poor expressive language. These boys were speaking at best in short, telegraphic sentences, and many had moderately severe articulation disorders with quite poor intelligibility. The 12 boys with better outcome had a range of language skills. All spoke in sentences to some extent, and each displayed some mastery of early morphemes (prepositions, plurals, articles, progressive tense, and possessives). However, few if any of the children spoke in completely fluent, syntactically complex, and morphologically correct language. Problems with copula and auxiliary verbs, with past tense inflections, and with pronouns seemed especially common. This research suggests that children with SELD at 24 to 30 months are at considerable risk for continuing language problems.

The Hierarchical Taxonomy of Psychopathology (HiTOP) : A Dimensional Alternative to Traditional Nosologies

The reliability and validity of traditional taxonomies are limited by arbitrary boundaries between psychopathology and normality, often unclear boundaries between disorders, frequent disorder co-occurrence, heterogeneity within disorders, and diagnostic instability. These taxonomies went beyond evidence available on the structure of psychopathology and were shaped by a variety of other considerations, which may explain the aforementioned shortcomings. The Hierarchical Taxonomy Of Psychopathology (HiTOP) model has emerged as a research effort to address these problems. It constructs psychopathological syndromes and their components/subtypes based on the observed covariation of symptoms, grouping related symptoms together and thus reducing heterogeneity. It also combines co-occurring syndromes into spectra, thereby mapping out comorbidity. Moreover, it characterizes these phenomena dimensionally, which addresses boundary problems and diagnostic instability. Here, we review the development of the HiTOP and the relevant evidence. The new classification already covers most forms of psychopathology. Dimensional measures have been developed to assess many of the identified components, syndromes, and spectra. Several domains of this model are ready for clinical and research applications. The HiTOP promises to improve research and clinical practice by addressing the aforementioned shortcomings of traditional nosologies. It also provides an effective way to summarize and convey information on risk factors, etiology, pathophysiology, phenomenology, illness course, and treatment response. This can greatly improve the utility of the diagnosis of mental disorders. The new classification remains a work in progress. However, it is developing rapidly and is poised to advance mental health research and care significantly as the relevant science matures.

Overextension in Early Language Development

This research explored overextension in the early vocabularies of six children, followed in a language diary study from 1; 0 to 1; 8. Results indicated that only one-third of the first 75 words acquired by each child were ever overextended. A small set of high-frequency, early acquired words accounted for a disproportionate number of overextensions. Overextensions were classified into three types: categorical overinclusions, analogical overextensions and predicate statements. Four types of information served as the bases for word applications: perceptual, action-functional, affective and contextual. The use of words to denote associative complexes of a well-organized, systematic character was discussed as a characteristic form of early word usage.

The Relation of Utterance Length to Grammatical Complexity in Normal and Language-Disordered Groups.

Mean length of utterance (MLU) in morphemes was examined as a predictor of the grammatical complexity of natural language corpora of normal preschoolers and of children and adolescents with delayed language, Fragile X syndrome, Down syndrome, and autism. The Index of Productive Syntax (IPSyn) served as the measure of syntactic and morphological proficiency. For all groups, a strong curvilinear association between measures was found across the MLU range from 1.0 to about 4.5. Correlations were weaker when MLU exceeded 3.0 than during earlier stages of language development, however, confirming previous suggestions that MLU becomes less closely associated with grammatical development as linguistic proficiency increases. For the language-disordered groups, moreover, the curves relating the two measures differed from the curves for the normal preschoolers because MLU frequently overestimated actual IPSyn scores. The results are discussed with respect to the use of MLU in conjunction with other measures of syntactic complexity in the study of atypical language development.

Cross-Informant Agreement Between Parent-Reported and Adolescent Self-Reported Problems in 25 Societies

We used population sample data from 25 societies to answer the following questions: (a) How consistently across societies do adolescents report more problems than their parents report about them? (b) Do levels of parent–adolescent agreement vary among societies for different kinds of problems? (c) How well do parents and adolescents in different societies agree on problem item ratings? (d) How much do parent–adolescent dyads within each society vary in agreement on item ratings? (e) How well do parent–adolescent dyads within each society agree on the adolescents deviance status? We used five methods to test cross-informant agreement for ratings obtained from 27,861 adolescents ages 11 to 18 and their parents. Youth Self-Report (YSR) mean scores were significantly higher than Child Behavior Checklist (CBCL) mean scores for all problem scales in almost all societies, but the magnitude of the YSR–CBCL discrepancy varied across societies. Cross-informant correlations for problem scale scores varied more across societies than across types of problems. Across societies, parents and adolescents tended to rate the same items as low, medium, or high, but within-dyad parent–adolescent item agreement varied widely in every society. In all societies, both parental noncorroboration of self-reported deviance and adolescent noncorroboration of parent-reported deviance were common. Results indicated many multicultural consistencies but also some important differences in parent–adolescent cross-informant agreement. Our findings provide valuable normative baselines against which to compare multicultural findings for clinical samples.

International comparisons of behavioral and emotional problems in preschool children: Parents' reports from 24 societies

International comparisons were conducted of preschool childrens behavioral and emotional problems as reported on the Child Behavior Checklist for Ages 1½–5 by parents in 24 societies (N = 19,850). Item ratings were aggregated into scores on syndromes; Diagnostic and Statistical Manual of Mental Disorders–oriented scales; a Stress Problems scale; and Internalizing, Externalizing, and Total Problems scales. Effect sizes for scale score differences among the 24 societies ranged from small to medium (3–12%). Although societies differed greatly in language, culture, and other characteristics, Total Problems scores for 18 of the 24 societies were within 7.1 points of the omnicultural mean of 33.3 (on a scale of 0–198). Gender and age differences, as well as gender and age interactions with society, were all very small (effect sizes < 1%). Across all pairs of societies, correlations between mean item ratings averaged .78, and correlations between internal consistency alphas for the scales averaged .92, indicating that the rank orders of mean item ratings and internal consistencies of scales were very similar across diverse societies.

Late-talking toddlers: MLU and IPSyn outcomes at 3;0 and 4;0.

Expressive language outcomes measured by MLU and the Index of Productive Syntax (IPSyn) at ages 3;0 and 4;0 were investigated in 34 late talkers with normal receptive language identified between 2;0 to 2;7 and 16 typically developing comparison children matched on age, SES, and nonverbal ability. Late talkers made greater gains than comparison children between 3;0 and 4;0 in both MLU and IPSyn raw score. However, when age-standardized z-scores were analysed, the late talkers were about 2.5 standard deviations below comparison children on both measures at both ages. At 3;0, 41% of the late talkers had MLUs above the 10th percentile based on Scarboroughs (1990) benchmark sample; by 4;0, 71% did so. Using the IPSyn, a more stringent measure, 34% scored above the 10th percentile at 3;0 and only 29% did so at 4;0. MLU was significantly correlated with the IPSyn at both ages for the late talkers, but only at 3;0 for the comparison children. A converging set of regression analyses indicated no group differences in the predictive relationship between MLU and IPSyn, suggesting that the late talkers were delayed on both measures but not deviant in their development.