Development and initial validation of the Preschool Imitation and Praxis Scale (PIPS) |
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| Authors: | Marleen Vanvuchelen Herbert Roeyers Willy De Weerdt |
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| Institution: | 1. Aberdeen Biomedical Imaging Centre, University of Aberdeen, Lilian Sutton Building, Aberdeen AB25 2ZD, UK;2. Perception Lab, School of Psychology and Neuroscience, University of St Andrews, St Mary''s Quad, South Street, St Andrews KY16 9JP, UK;3. Clinical Research Centre, Division of Applied Health Sciences, University of Aberdeen, Royal Cornhill Hospital, Aberdeen AB25 2ZH, UK;4. SINAPSE Collaboration (www.sinapse.ac.uk), UK;1. Centro Asociado de Madrid, UNED, Madrid, Spain;2. IES Pablo Picasso, Consejería de Educación de Madrid, Madrid, Spain;3. Departamento de Producción Agraria, ETSIAAB-UPM, Madrid, Spain |
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| Abstract: | The goal of this study was to develop and subsequently evaluate the internal construct and criterion-related validity of the Preschool Imitation and Praxis Scale (PIPS). Different task characteristics were selected considered to be important as unravelled in research in apraxic adults to tap a broad range of possible imitation mechanisms. Participants included 498 children without disabilities (1–4.9 years) and 47 children with autism spectrum disorders (ASD) (1.9–4.5 years). Exploratory factor analysis disclosed 4 dimensions in the scale, labelled: goal directed versus non-goal directed procedural imitation and single versus sequential bodily imitation. Internal consistency for the PIPS scale (α = .97) and subscales was high (α ranged from .79 to .96). In both samples, the PIPS scale score was strongly related to age (r = .78, respectively r = .56). Significant relationships between the PIPS score and mental, language, motor ages in the ASD sample supported criterion-related validity (r ranged from .59 to .74). The PIPS appears to have fundamentally sound psychometric characteristics, although more research is needed. |
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