The Model of Human Occupation (Kielhofner, 2008) postulates that occupational participation is influenced by volition, habituation, three skill areas, and the environment. The Model of Human Occupation Screening Tool (MOHOST) (Parkinson, Forsyth, Kielhofner, 2004) was developed to provide a broad assessment of the factors that influence a client's occupational participation. The purpose of this study was to ask whether there was evidence that the items of the MOHOST meaningfully cluster into these theoretical sub-constructs. Nine occupational therapists used the MOHOST with 166 clients in the US and the UK, and a series of confirmatory factor analyses (CFA) were conducted. The six-dimensional model fit better than the one-dimensional model, and the standardized coefficients also indicated that the items were well designed and captured each factor. The results of this study confirmed the hypothesis that the MOHOST contains six factors and provides further evidence of the validity of the MOHOST
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