Abstract

This study was designed to develop and validate an instrument that can enable researchers and scholars to measure the attitudes of teachers towards learners with disabilities in an inclusive classroom. The study was grounded on the three-components theory of attitude. A series of steps were followed to ascertain the face and content validity of the instrument. Based on the data collected from 532 respondents, preliminary screening was performed, items with weak or high correlation to others were dropped or retained. The construct validity and dimensionality of the instrument was evaluated using Exploratory Factor Analysis (EFA), following the Principal Component Analysis (PCA) extraction, with a varimax rotation based on Eigenvalues greater than one. The results yielded a three-factor solution after suppressing loadings less than .40. These factors were labelled carefully based on the statements of the leading items loading. Cronbach alpha was employed in evaluating the reliability of the instrument, with values ranging from .849 to .938, indicating that the instrument is internally consistent. Consequently, the proposed 36 items instrument was reduced to 30 items. The procedures followed, coupled with the removal of dysfunctional items, resulted in an instrument with appropriate psychometric properties and high reliability for measurement.