scholarly journals Performance on the Kaufman Brief Intelligence Test-2 by Children With Williams Syndrome

2016 ◽  
Vol 121 (1) ◽  
pp. 33-47 ◽  
Author(s):  
C. Holley Pitts ◽  
Carolyn B. Mervis
Keyword(s):  
Sex Differences ◽  
General Population ◽  
Williams Syndrome ◽  
Maternal Education ◽  
Full Range ◽  
Intelligence Test ◽  
Standard Score ◽  
Kaufman Brief Intelligence Test

Abstract We describe the performance of 292 4- to 17-year-olds with Williams syndrome (WS) on the Kaufman Brief Intelligence Test-2 (KBIT-2; Kaufman & Kaufman, 2004). Mean IQ Composite, Verbal standard score (SS), and Nonverbal SS were in the borderline range relative to the general population, with variability similar to the general population. Correlations between SSs and CA were close to 0, with no significant sex differences. There was a significant effect of maternal education on Verbal SS. The KBIT-2 appropriately captures the full range of performance of 8- to 17-year-olds with WS for the abilities measured and of all but the very lowest-functioning 5- to 7-year-olds. However, the KBIT-2 does not contain easy enough items to adequately assess the abilities of the lowest quartile of 4-year-olds.

scholarly journals Longitudinal Assessment of Intellectual Abilities of Children With Williams Syndrome: Multilevel Modeling of Performance on the Kaufman Brief Intelligence Test—Second Edition

2012 ◽  
Vol 117 (2) ◽  
pp. 134-155 ◽  
Author(s):  
Carolyn B. Mervis ◽  
Doris J. Kistler ◽  
Angela E. John ◽  
Colleen A. Morris
Keyword(s):  
Sex Differences ◽  
Individual Differences ◽  
Multilevel Modeling ◽  
Williams Syndrome ◽  
Maternal Education ◽  
Intelligence Test ◽  
Intellectual Ability ◽  
Longitudinal Assessment ◽  
Intellectual Abilities ◽  
Kaufman Brief Intelligence Test

Abstract Multilevel modeling was used to address the longitudinal stability of standard scores (SSs) measuring intellectual ability for children with Williams syndrome (WS). Participants were 40 children with genetically confirmed WS who completed the Kaufman Brief Intelligence Test—Second Edition (KBIT-2; A. S. Kaufman & N. L. Kaufman, 2004) 4–7 times over a mean of 5.06 years. Mean age at first assessment was 7.44 years (range  =  4.00–13.97 years). On average, KBIT-2 Composite IQ, Verbal SS, and Nonverbal SS were stable from 4 to 17 years, although there were significant individual differences in intercept (Composite IQ, Verbal SS, Nonverbal SS) and slope (Composite IQ, Nonverbal SS). Maternal education was significantly related to Verbal SS intercept. No significant sex differences were found. Implications for studies of genotype/phenotype correlations in WS are discussed.

Relation of Performance on the Kaufman Brief Intelligence Test with the Peabody Picture Vocabulary Test—Revised among Preschool Children

1994 ◽  
Vol 79 (3) ◽  
pp. 1195-1199 ◽  
Author(s):  
John S. Childers ◽  
Thomas W. Durham ◽  
Stephanie Wilson
Keyword(s):  
Preschool Children ◽  
Concurrent Validity ◽  
Intelligence Test ◽  
Vocabulary Test ◽  
Peabody Picture Vocabulary ◽  
Peabody Picture Vocabulary Test ◽  
Standard Score ◽  
Instrument Analysis ◽  
The Difference ◽  
Kaufman Brief Intelligence Test

58 children enrolled in a university preschool or kindergarten program were administered the Kaufman Brief Intelligence Test (K-BIT) and the Peabody Picture Vocabulary Test—Revised (PPVT—R). The PPVT—R correlated .75 with the K-BIT composite IQ, .69 with the K-BIT Vocabulary standard score, and .57 with the K-BIT Matrices score. The instruments also showed significant agreement (83%) in classifying children into average versus above average categories based upon a 110 standard score on either instrument. Analysis of K-BIT Vocabulary-Matrices differences showed a mean difference of 6 points favoring Vocabulary. Differences ranged from − 32 points to 43 points. 64% of the subjects scored higher on the Vocabulary than on the Matrices subtest of the K-BIT. 48% of the sample showed differences between scores on Vocabulary and Matrices of 10 points or more disregarding the direction of the difference. Implications for the concurrent validity of the instrument and interpretation of subscale differences for preschool children were discussed.

scholarly journals Developmental trajectories of autistic social traits in the general population

2021 ◽  
pp. 1-9
Author(s):  
Richard Pender ◽  
Pasco Fearon ◽  
Beate St Pourcain ◽  
Jon Heron ◽  
Will Mandy
Keyword(s):  
General Population ◽  
Full Range ◽  
Population Sample ◽  
Autistic Traits ◽  
Communication Disorders ◽  
Autism Spectrum ◽  
Growth Mixture Modelling ◽  
Autistic People ◽  
Social Difficulties ◽  
Autism Trait

Abstract Background Autistic people show diverse trajectories of autistic traits over time, a phenomenon labelled ‘chronogeneity’. For example, some show a decrease in symptoms, whilst others experience an intensification of difficulties. Autism spectrum disorder (ASD) is a dimensional condition, representing one end of a trait continuum that extends throughout the population. To date, no studies have investigated chronogeneity across the full range of autistic traits. We investigated the nature and clinical significance of autism trait chronogeneity in a large, general population sample. Methods Autistic social/communication traits (ASTs) were measured in the Avon Longitudinal Study of Parents and Children using the Social and Communication Disorders Checklist (SCDC) at ages 7, 10, 13 and 16 (N = 9744). We used Growth Mixture Modelling (GMM) to identify groups defined by their AST trajectories. Measures of ASD diagnosis, sex, IQ and mental health (internalising and externalising) were used to investigate external validity of the derived trajectory groups. Results The selected GMM model identified four AST trajectory groups: (i) Persistent High (2.3% of sample), (ii) Persistent Low (83.5%), (iii) Increasing (7.3%) and (iv) Decreasing (6.9%) trajectories. The Increasing group, in which females were a slight majority (53.2%), showed dramatic increases in SCDC scores during adolescence, accompanied by escalating internalising and externalising difficulties. Two-thirds (63.6%) of the Decreasing group were male. Conclusions Clinicians should note that for some young people autism-trait-like social difficulties first emerge during adolescence accompanied by problems with mood, anxiety, conduct and attention. A converse, majority-male group shows decreasing social difficulties during adolescence.

Thyroid Disorders in the General Population of Hisayama Japan, with Special Reference to Prevalence and Sex Differences

1987 ◽  
Vol 16 (4) ◽  
pp. 545-549 ◽  
Author(s):  
KEN OKAMURA ◽  
TOSHIRO NAKASHIMA ◽  
KAZUO UEDA ◽  
KENJIRO INOUE ◽  
TERUO OMAE ◽  
...  
Keyword(s):  
Sex Differences ◽  
General Population ◽  
Special Reference ◽  
Thyroid Disorders

Color Blindness in Mentally Retarded Children

1969 ◽  
Vol 35 (8) ◽  
pp. 609-616 ◽  
Author(s):  
Jerome D. Schein ◽  
John A. Salvia
Keyword(s):  
Sex Differences ◽  
General Population ◽  
Color Vision ◽  
Mentally Retarded ◽  
Color Blindness ◽  
Instructional Materials ◽  
Normal Children ◽  
Color Blind ◽  
Mentally Retarded Children

Recent studies of mentally retarded children have found substantially higher rates of color blindness than are usually reported for the general population. In 2 of these studies, sex differences in color blindness, invariably found in intellectually normal children, do not appear. Reanalysis of data from one of the studies of retarded children suggests the possibility that the high rates arise from the difficulty in comprehending the test and following the directions rather than from faulty color vision. However, even if the number of color blind retarded children is actually lower than these studies show, the need for research on this topic seems apparent. Using color dependent instructional materials with color blind, mentally retarded children may be detrimental.

scholarly journals The systemizing quotient: an investigation of adults with Asperger syndrome or high–functioning autism, and normal sex differences

2003 ◽  
Vol 358 (1430) ◽  
pp. 361-374 ◽  
Author(s):  
Simon Baron-Cohen ◽  
Jennifer Richler ◽  
Dheraj Bisarya ◽  
Nhishanth Gurunathan ◽  
Sally Wheelwright
Keyword(s):  
Sex Differences ◽  
General Population ◽  
Asperger Syndrome ◽  
High Functioning Autism ◽  
Mental States ◽  
Self Report ◽  
Adult Males ◽  
High Functioning ◽  
Major Dimension ◽  
Empathy Quotient

Systemizing is the drive to analyse systems or construct systems. A recent model of psychological sex differences suggests that this is a major dimension in which the sexes differ, with males being more drawn to systemize than females. Currently, there are no self–report measures to assess this important dimension. A second major dimension of sex differences is empathizing (the drive to identify mental states and respond to these with an appropriate emotion). Previous studies find females score higher on empathy measures. We report a new self–report questionnaire, the Systemizing Quotient (SQ), for use with adults of normal intelligence. It contains 40 systemizing items and 20 control items. On each systemizing item, a person can score 2, 1 or 0, so the SQ has a maximum score of 80 and a minimum of zero. In Study 1, we measured the SQ of n = 278 adults (114 males, 164 females) from a general population, to test for predicted sex differences (male superiority) in systemizing. All subjects were also given the Empathy Quotient (EQ) to test if previous reports of female superiority would be replicated. In Study 2 we employed the SQ and the EQ with n = 47 adults (33 males, 14 females) with Asperger syndrome (AS) or high–functioning autism (HFA), who are predicted to be either normal or superior at systemizing, but impaired at empathizing. Their scores were compared with n = 47 matched adults from the general population in Study 1. In Study 1, as predicted, normal adult males scored significantly higher than females on the SQ and significantly lower on the EQ. In Study 2, again as predicted, adults with AS/HFA scored significantly higher on the SQ than matched controls, and significantly lower on the EQ than matched controls. The SQ reveals both a sex difference in systemizing in the general population and an unusually strong drive to systemize in AS/HFA. These results are discussed in relation to two linked theories: the ‘empathizing–systemizing’ (E–S) theory of sex differences and the extreme male brain (EMB) theory of autism.

Sex Differences in Factors Associated With Progression of Aortic Valve Calcification in the General Population

2022 ◽  
Author(s):  
Axel Diederichsen ◽  
Jes Sanddal Lindholt ◽  
Jacob Eifer Møller ◽  
Oke Gerke ◽  
Lars Melholt Rasmussen ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Sex Differences ◽  
Aortic Valve ◽  
General Population ◽  
Incidence Rate ◽  
Interquartile Range ◽  
Aortic Valve Calcification ◽  
Valve Calcification ◽  
Factors Associated

Background: Guidelines recommend measurement of the aortic valve calcification (AVC) score to help differentiate between severe and nonsevere aortic stenosis, but a paucity exists in data about AVC in the general population. The aim of this study was to describe the natural history of AVC progression in the general population and to identify potential sex differences in factors associated with this progression rate. Methods: Noncontrast cardiac computed tomography was performed in 1298 randomly selected women and men aged 65 to 74 years who participated in the DANCAVAS trial (Danish Cardiovascular Screening). Participants were invited to attend a reexamination after 4 years. The AVC score was measured at the computed tomography, and AVC progression (ΔAVC) was defined as the difference between AVC scores at baseline and follow-up. Multivariable regression analyses were performed to identify factors associated with ΔAVC. Results: Among the 1298 invited citizens, 823 accepted to participate in the follow-up examination. The mean age at follow-up was 73 years. Men had significantly higher AVC scores at baseline (median AVC score 13 Agatston Units [AU; interquartile range, 0–94 AU] versus 1 AU [interquartile range, 0–22 AU], P <0.001) and a higher ΔAVC (median 26 AU [interquartile range, 0–101 AU] versus 4 AU [interquartile range, 0–37 AU], P <0.001) than women. In the fully adjusted model, the most important factor associated with ΔAVC was the baseline AVC score. However, hypertension was associated with ΔAVC in women (incidence rate ratios, 1.58 [95% CI, 1.06–2.34], P =0.024) but not in men, whereas dyslipidemia was associated with ΔAVC in men (incidence rate ratio: 1.66 [95% CI, 1.18–2.34], P =0.004) but not in women. Conclusions: The magnitude of the AVC score was the most important marker of AVC progression. However, sex differences were significant; hence, dyslipidemia was associated with AVC progression only among men; hypertension with AVC progression only among women. REGISTRATION: URL: https://www.isrctn.com ; Unique identifier: ISRCTN12157806.

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