Interdisciplinary Teaching Design Self-Efficacy Scale: The validity and reliability study

Hülya Sevim Kılınç; Gülsüm Gök; Nezaket Bilge Uzun

doi:10.46778/goputeb.1741954

EN

Interdisciplinary Teaching Design Self-Efficacy Scale: The validity and reliability study

Abstract

The aim of this study is to develop a valid and reliable instrument to assess teachers’ self-efficacy in designing interdisciplinary teaching. During the scale development process, the scaling by cumulative sums approach based on participant responses was employed. Validity evidence was gathered through content and construct validity procedures. An item pool was generated based on focus group interviews and a comprehensive literature review, followed by expert review for content validation. The study sample comprised 350 teachers for exploratory factor analysis (EFA) and 231 teachers for confirmatory factor analysis (CFA). The final version of the scale obtained through analyses consists of 21 items measured on an 11-point scale ranging from 0 to 100, structured under two factors, namely, Competencies and Challenges. The scale demonstrated high reliability, with Cronbach's alpha coefficients of 0.95 and 0.92 for the respective factors. The total variance explained by the two subscales collectively is 66.21%. The confirmatory factor analysis (CFA) yielded satisfactory model fit, with all goodness-of-fit indices meeting the recommended thresholds for acceptable to excellent fit, supporting the structural validity of the model χ² =1413.84, df=516, (χ²/df=2.74), RMSEA=.09, CFI=.92, RFI=.86, NNFI= .92, SRMR =.05. These findings provide robust evidence that the scale is a scientifically and psychometrically valid and reliable instrument for assessing teachers’ self-efficacy in designing interdisciplinary instruction.

Keywords

Teacher Self-efficacy , Interdisciplinary Teaching Design , Scale Development , Scale Validation

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Details

Primary Language

English

Subjects

Scale Development , Teacher Education and Professional Development of Educators , STEM Education

Journal Section

Research Article

Authors

Hülya Sevim Kılınç
0009-0006-4170-1796
Türkiye

Gülsüm Gök ^*
0000-0003-2959-0000
Türkiye

Nezaket Bilge Uzun
0000-0003-2293-4536
Türkiye

Publication Date

March 29, 2026

Submission Date

July 14, 2025

Acceptance Date

September 8, 2025

Published in Issue

Year 1970 Volume: 14 Number: 1

DOI

https://doi.org/10.46778/goputeb.1741954

IZ

https://izlik.org/JA77KG23NU

APA

Kılınç, H. S., Gök, G., & Uzun, N. B. (2026). Interdisciplinary Teaching Design Self-Efficacy Scale: The validity and reliability study. International Journal of Turkish Education Sciences, 14(1), 85-108. https://doi.org/10.46778/goputeb.1741954

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Interdisciplinary Teaching Design Self-Efficacy Scale: The validity and reliability study

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References

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Primary Language

Subjects

Journal Section

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Publication Date

Submission Date

Acceptance Date

Published in Issue

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