Self-perception is linked to a variety of psychosocial outcomes and its measurement has become a priority across a several disciplines. The Self-Perception Profile for Children (SPP-C) is commonly utilized to measure both global self worth and several important sub-domains of self-perception. Although much research has suggested this instrument possesses good internal consistency, previous investigations have primarily employed Cronbach's α; to estimate the stability of responding across items. This represents an important limitation, as α; is vulnerable to mis-estimation in the presence of correlated errors and non-τ-equivalent indicators, neither of which have been ruled out for the SPP-C. The present investigation initially examined the SPP-C responses from 106 girls, aged 8-12 to assess whether the assumptions underlying Cronbach's α; could be justified for this instrument. The investigation then re-estimated the internal consistency of the SPP-C using a covariance structure modeling approach. Results show that not a single scale of the SPP-C met all of the requirements for accurate estimation with α;. In two cases, α; was found to be meaningfully different from the reliability estimated with more durable methods. Lastly, the reliability of the Physical Appearance (PA) sub-scale was not significantly greater than the .70 cutoff for use as a research instrument. Discussion is centered on the appropriateness of Cronbach's α; for estimating the reliability of the SPP-C and recommends revision of the PA sub-scale.
Sara K. Sifers
Date of Degree
Master of Arts (MA)
Social and Behavioral Sciences
Cero, I. (2012). Internal consistency of the self-perception profile for children: Using covariance structure modeling to overcome the limitations of Cronbach's α. [Master’s thesis, Minnesota State University, Mankato]. Cornerstone: A Collection of Scholarly and Creative Works for Minnesota State University, Mankato. https://cornerstone.lib.mnsu.edu/etds/23
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