PSYCHOMETRIC RECONSTRUCTION OF THE INQUIRY SCIENCE TEACHING STRATEGIES (ISTS) INSTRUMENT

Sebastian Szyjka; Frackson Mumba

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PSYCHOMETRIC RECONSTRUCTION OF THE INQUIRY SCIENCE TEACHING STRATEGIES (ISTS) INSTRUMENT

Title	PSYCHOMETRIC RECONSTRUCTION OF THE INQUIRY SCIENCE TEACHING STRATEGIES (ISTS) INSTRUMENT
Publication Type	Journal Article
Year of Publication	2012
Authors	Szyjka, S, Mumba, F
Journal	Journal of Baltic Science Education
Volume	11
Issue	1
Start Page	55-66
Date Published	March/2012
Type of Article	Original article
ISSN	1648-3898
Other Numbers	ICID: 988262
Keywords	attitudes towards inquiry-based science, evaluation of psychometric properties, instrument development
Abstract	This study re-evaluated the psychometric properties of the 40-item Inquiry Science Teaching Strategies instrument [ISTS] (Lazarowitz & Lee, 1976). The ISTS was administered to 201 elementary pre-service teachers at a university in the Midwest of United States during the 2009-2010 school terms. Initial CFA results failed to confirm the 3-factor structure of the original ISTS. A statistically significant goodness-of-fit statistic (χ² [737, N = 201] = 1394.61, p = 0.00) supported by two fit indices (GFI = 0.69, CFI = 0.45) indicated non-tenability of the measurement model. Subsequent PCA retained half of the components under an obliquely rotated 3-factor solution. Following the removal of 22 items, final CFA indicated non-tenability under slightly improved fitting (χ² [132, N = 201] = 236.93, p = 0.00, GFI = 0.88, CFI = 0.83). It is recommended that existing items be revised and new ones appended using Exploratory Factor Analysis with a different sample.
URL	http://oaji.net/articles/2014/987-1419166892.pdf
DOI	10.33225/jbse/12.11.55
Refereed Designation	Refereed
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