The Behavior Observation Scale for autism (BOS): Initial results of factor analyses

Freeman, B. J.; Schroth, Phillip; Ritvo, Edward; Guthrie, Donald; Wake, Lisa

doi:10.1007/bf02408293

Cited by 36 publications

(8 citation statements)

References 3 publications

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“…The same was true for the validity coefficients, where partialing out the effect of age had virtually no influence on the resulting correlations. Consistent with the findings of Wadden et al (1991), our results suggest that age may not be as influential in measuring autistic behavior as recent scholars have suggested (Freeman et al, 1980;Volkmar et al, 1988).…”

Section: Comparison Of Meanssupporting

confidence: 90%

“…Table 2 displays the validity coefficients between the ABC and PDDRS. Partial correlations, with chronological age as the control variable, were used because the literature (Freeman, Schroth, Ritvo, Guthrie, & Wake, 1980;Volkmar et al, 1988) suggests that age is negatively correlated with autistic behavior. All validity coefficients were significantly different from zero with two exceptions.…”

Section: Resultsmentioning

confidence: 99%

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Criterion-Related and construct validity of the pervasive developmental disorders rating scale and the autism behavior checklist

2000

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Section: Comparison Of Meanssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Criterion-Related and construct validity of the pervasive developmental disorders rating scale and the autism behavior checklist

2000

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“…Wadden et al (1991), DiLalla and Rogers (1994), Berument et al (1999), Stella et al (1999), Miranda-Linne and Melin (2002), Tadevosyan-Leyfer et al (2003), Lecavalier (2005), and van Lang et al (2006) all reported three-to six-factor solutions, concluding that different autism behaviors separate out between factors. Two earlier small studies also found multiple factors that divided up social impairments and RRBIs: one found four categories from factor analysis of the Behavior Observation Scale for autism (Freeman et al 1980) and the other found eight factors with eigenvalues above one, using the Autism Observation Schedule (AOS; Siegel et al 1986). …”

Section: Factor Analytic Studies Of the Autistic Triadmentioning

confidence: 97%

The ‘Fractionable Autism Triad’: A Review of Evidence from Behavioural, Genetic, Cognitive and Neural Research

2008

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Autism is diagnosed on the basis of a triad of impairments in social interaction, communication, and flexible imaginative functions (with restricted and repetitive behaviors and interests; RRBIs). There has been a strong presumption that these different features of the syndrome are strongly intertwined and proceed from a common cause at the genetic, cognitive and neural levels. In this review we examine evidence for an alternative approach, considering the triad as largely 'fractionable'. We present evidence from our own twin studies, and review relevant literature on autism and autistic-like traits in other groups. We suggest that largely independent genes may operate on social skills/impairments, communication abilities, and RRBIs, requiring a change in molecular-genetic research approaches. At the cognitive level, we suggest that satisfactory accounts exist for each of the triad domains, but no single unitary account can explain both social and nonsocial features of autism. We discuss the implications of the fractionable-triad approach for both diagnosis and future research directions.

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“…The BOS (Freeman et al & 1980 covers the ages of 2-5 Vz of nine 3 min interval observations. The measure comprises 67 behaviours.…”

Section: Behaviour Observation Scale (Bos)mentioning

confidence: 99%

Early detection of childhood autism: a review of screening instruments and rating scales

Vostanis

Smith

Chung

et al. 1994

Child

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The detection and diagnosis of autism may be delayed until middle childhood, 3-4 years after its onset. This is more likely in high-functioning autism and in cases of co-morbidity with mental retardation. Such delays have serious effects on children and their families as well as on the provision of clinical and educational resources. In addition to greater awareness among professionals and to the development of comprehensive services, early detection could be facilitated by screening for early signs and symptoms of autism. The instruments that have been developed to rate autistic behaviours, particularly in pre-school children, are reviewed in this paper. Although the majority of these observational or informant-based measures were not initially designed for screening purposes, previous research findings from their application could be useful in the future development of such a screening instrument. Relevant research findings are discussed and suggestions are made for further evaluation in appropriate populations.

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The Behavior Observation Scale for autism (BOS): Initial results of factor analyses

Cited by 36 publications

References 3 publications

Criterion-Related and construct validity of the pervasive developmental disorders rating scale and the autism behavior checklist

Criterion-Related and construct validity of the pervasive developmental disorders rating scale and the autism behavior checklist

The ‘Fractionable Autism Triad’: A Review of Evidence from Behavioural, Genetic, Cognitive and Neural Research

Early detection of childhood autism: a review of screening instruments and rating scales

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