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Article
Sensory differences and stereotyped movements in children with autism.
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Year: 2002

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Abstract

This study was designed to test whether there is a functional relationship between sensory stimulation and stereotyped movements (SM). Four children with autism and intellectual disability (according to DSM-IV criteria) who showed stereotyped movements were studied. The Short Sensory Profile was used to define whether a child perceived stimulation within each sensory modality as aversive, attractive, or neutral. The Stereotyped and Self-Injurious Movements Interview was used to identify each child's repetitive movements. Children were then exposed to sensory stimuli that were neutral, aversive or attractive. Results indicate that children: (a) initiate or increase stereotyped movements immediately following the onset of an aversive stimulus, (b) terminate or decrease stereotyped movements following the onset of an attractive stimulus and (c) initiate or increase stereotyped movements during periods of neutral stimulation. We conclude that stereotyped movements are functionally related to sensory stimulation; individuals who frequently engage in stereotyped movements may do so in order to cope with under-stimulation and aversive over-stimulation


Article
Construct models in veterinary behavioural medicine: Lessons from the human experience.
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Year: 2003

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Abstract

Veterinary behavioural medicine is marked by inconsistency in the naming and description of animal behavioural disorders, potentially hindering research and reducing the clinical utility of diagnoses. Sources of diagnostic inconsistency are suggested and parallels with human psychiatry are identified. This paper questions the use of categorical models as the basis for classification and reviews criticisms of categorical approaches in psychiatry. Evidence is presented to suggest an inconsistency between discrete categories and the structure of animal behavioural disorders. The potential benefits of exploring alternative models are discussed. It is concluded that it is important to move away from an approach based on advocacy and towards objective assessment of all available data. Existing diagnoses should be viewed as hypothetical constructs, with the underlying hypotheses being identified and subject to investigation. It is emphasized that global communication, empirical investigations and critical review are necessary for the development of a solid scientific basis within veterinary behavioural medicine

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