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Published on: September 11, 2021
Construct Validation of the Self-Efficacy Teaching and Knowledge Instrument for Science Teachers-Revised
Linda A Pruski1, Sharon L Blanco1, Rosemary A Riggs1
1Division of Geriatrics, Gerontology, and Palliative Care, Department of Medicine, Teacher Enrichment Initiatives, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, MSC 7780, San Antonio, TX 78229-3900 USA ; Barshop Institute for Aging and Longevity Studies, University of Texas Health Science Center at San Antonio, 15355 Lamda Drive, MSC 7755, San Antonio, TX 78245 USA.
Abstract:
Described herein is the academic lineage and independent validation of the Self-Efficacy Teaching and Knowledge Instrument for Science Teachers-Revised (SETAKIST-R). Data from 334 K-12 science teachers were analyzed using Partial Credit Rasch models. Principal components analysis on the person-item residuals suggest two latent dimensions: Knowledge and Teaching Self-Efficacies. Item-fit statistics were used to select items for each subscale. Person and item separation (reliability) indices were quite low, and we noted disordered response patterns on the person-item maps that revealed problems with item content and/or scaling for both subscales. These issues include the presence of: verbal negatives, ambiguous modifiers, counter-intuitive scaling, and an "undecided/uncertain" option. The SETAKIST-R, in its current form, cannot be recommended as a measure of science teacher self-efficacy.
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