The International Journal of Humanities & Social Studies

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The purpose of this study is to determine the reliability and validity of an Instrument for School Development. Professional development, teacher professional competencies and school continual improvement items were accepted by 5 experts who reviewed the content, construct and face validity of this instrument. A survey research with simple random sampling for data collection were administrated to 300 respondents in Sarawak national secondary schools. The total scale of this instrument was .94 which showed high internal consistency with professional development Cronbach alpha at .86, teacher professional competencies at .91 and continual school improvement at .87. The Kaiser-Meyer-Olkin Measure of sampling adequacy (KMO) value was .851 and Bartlett’s test of sphericity value at 9517.4 was significant. Total Variance Explained for the first four components recorded eigenvalues of 30.8%. Scree plot showed a break between the second and third component. The factors were retained because eigenvalue of PCA was larger than the criterion value of Parallel Analysis which supported the decision of scree plot to retain only two factors for further investigation. The findings showed that the Instrument for School Development was a reliable and valid instrument. 


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