BackgroundThe Oswestry Disability Index (ODI) is widely used for patients with back pain. However, few studies have examined its psychometric properties using modern measurement theory. The purpose of this study was to investigate the psychometric properties of the ODI in patients with back pain using Rasch analysis.MethodsA total of 408 patients with back pain participated in this cross-sectional study. Patients were recruited from the orthopedic, neurosurgery, rehabilitation departments and pain clinic of two hospitals. Rasch analysis was used to examine the Chinese version of ODI 2.1 for unidimensionality, item difficulty, category function, differential item functioning, and test information.ResultsThe fit statistics showed 10 items of the ODI fitted the model’s expectation as a unidimensional scale. The ODI measured the different levels of functional limitation without skewing toward the lower or higher levels of disability. No significant ceiling and floor effects and gaps among the items were found. The reliability was high and the test information curve demonstrated precise dysfunction estimation.ConclusionsOur results showed that the ODI is a unidimensional questionnaire with high reliability. The ODI can precisely estimate the level of dysfunction, and the item difficulty of the ODI matches the person ability. For clinical application, using logits scores could precisely represent the disability level, and using the item difficulty could help clinicians design progressive programs for patients with back pain.

Both general cognitive dysfunction and specific verbal memory and comprehension deficit impair daily functions in people with ID. These findings have implications for predictive models of adaptive functioning, and for cognitive rehabilitation and deficit compensation strategies for this group.

This study investigated the effects of exposure to pseudoscientific television (TV) programs upon Taiwanese citizens' pseudoscientific beliefs. The beliefs and practices of pseudoscience portrayed in the media may misguide the citizens in making life choices that may lead to negative consequences. Participants of this study included 2,024 individuals who were selected using probability proportional to size sampling method. Interviews were conducted and survey data were quantitatively analyzed by means of stepwise multiple regressions and reported with the use of cross tables. Results revealed exposure to pseudoscientific TV programs as a strong predictor of Taiwanese citizens' pseudoscientific beliefs and that younger citizens demonstrate more pseudoscientific beliefs and practices than older citizens. Researchers of this study proposed the need for making better use of mass media as a way to educate citizens about science and reduce pseudoscientific beliefs.

The simplified model showed the highest reliability and validity, and the factor structure was the simplest/clearest one. The simplified model is recommended for clinical use due to its convenience and precision for assessing the problems of patients with CTS.

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The goal of this study was to examine the relationship between the validity of postural movement and bilateral motor integration in terms of sensory integration theory. Participants in this study were 61 Chinese children ages 48 to 70 months. Structural equation modeling was applied to assess the relation between measures tapping postural movement and bilateral motor integration: for postural movement, the measures involve the Monkey Task, Side-Sit Co-contraction, Prone on Elbows, Wheelbarrow Walk, Airplane, and Scooter Board Co-contraction from the DeGangi-Berk Test of Sensory Integration, and Standing Balance with Eyes Closed/Opened in Southern California Sensory Integration Tests. For bilateral motor integration, the measures chosen were the Rolling Pin Activity, Jump and Turn, Diadokokinesis, Drumming, and Upper Extremity Control from the DeGangi-Berk Test of Sensory Integration, and Cross the Midline in Southern California Sensory Integration Tests (SCSIT). Postural movement was highly correlated with the bilateral motor integration. The factor structure fit the theoretical conceptualization, classifying postural movement and bilateral motor integration together in the same category. Therapists could combine two separate objectives (postural movement and bilateral motor integration) of intervention in an activity to improve the adaptive skills based on the vestibular-proprioceptive integration.

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The present study consisted of two phases: development and psychometric validation of a Chinese version of the Hooper Visual Organization Test (HVOT) using Rasch analysis and the provision of normative data on the basis of a representative sample of the Chinese-speaking population. The HVOT was administered to 1008 healthy adults aged 15-79 years, 60 patients with stroke, and 60 patients with schizophrenia. The results indicated that with 12 items removed, the resulting 18-item scale was found to be unidimensional, with satisfactory internal consistency and no evidence of differential item functioning or bias for age, sex and educational level. There were significant differences between each of the two patient groups and normal controls on the scores of the Rasch-developed measure. All test-retest coefficients exceeded 90 in patient samples. As performance on the Chinese version decreases with age and lower years of education, regression-based normative data that took age and education into account were established. A cut-off score of 21.5, out of an x-y range, the higher the better, resulted in a sensitivity of 0.86 and a specificity of 0.68. The normative data presented here will enable clinicians to determine different levels of visuosynthetic impairments more precisely.