This study assessed the content relevance and construct-relevance of the Physical Educators' Attitude Toward Teaching Individuals With Disabilities (PEATID-IV) survey, a revision of Rizzo's (1984, 1993) surveys. Evidence of validity was reported on earlier versions of the PEATID (Rizzo, 1984; Folsom-Meek & Rizzo, 2002; & Casebolt and Rizzo, 2004), but the survey was criticized for its lack of theoretical completeness (Kozub & Lienert, 2003). The revised PEATID-IV was developed according to the protocol of the Theory of Planned Behavior (TPb) (Ajzen, 1991). The survey consisted of a description of a student with a disability, 57 theoretically-driven items using a seven-point semantic differential scale and six demographic items applying theoretical components to assess intentions about teaching a student with disability. Six experts reviewed the survey for content and construct (i.e., the substantive aspect) relevance (Messick, 1995). Of the six experts, two had expertise in attitude theory and research. The other four had expertise in attitude theory and research in adapted physical activity. All concluded the survey had content and construct (substantive) relevance (by applying the TPb model). Another substantive criterion, the structural aspect or representativeness, was established by appraising the fidelity of the scoring structure to the structure of the content domain by using the correlation coefficients among theoretical components (Messick, 1995). Sample size and power for the survey were established using Hinkle and Hinkle's (1983) model for estimation model of sample size which indicated the need for 54 teachers at an alpha level of .05. Sixty-eight of 119 (57%) physical educators in an urban east coast school district completed the PEATID-IV. Reliability (coefficient alpha) of the PEATID-IV for beliefs, attitudes, social norms, perceived behavior control, and intentions were .82, .92, .72, .71, and .77 respectively. Correlation coefficients among parts of the PEATID-IV were beliefs and attitude r=.40, p<.001; attitude and intention, r=.32, p<.009; attitude and subjective norm, r=.50, p<.001; normative beliefs and subjective norm r=.32, p<.007; control beliefs and perceived behavioral control .28, p<.025; perceived behavior control and intention, r=.08, p>.50. subjective norm and intention r=.50, p<.0001. Except for perceived behavior control and intentions, correlations ranged from low-moderate to moderate and were statistically significant. These moderate relationships are probably under represented because of the small sample size. That notwithstanding, the PEATID-IV has content and construct (i.e., substantive and structural) relevance, three of six aspects of validity that Messick (1995) recommended. Keyword(s): adapted physical activity, assessment, measurement/evaluation