Abstract
The Wide Range Achievement Test—Revised (WRAT-R) and Woodcock Reading Mastery Tests—Revised (WRMT-R) were administered twice to 269 current drug abusers over an average time interval of 204.20 days. Stability coefficients were very strong, ranging from .84 to .94. Correlations between the two instruments, ranging between .72 and .90, demonstrated strong concurrent validity. Average reading scores and grade equivalent scores were significantly higher at the second test. Exploratory data analyses revealed no demographic or drug-taking variables related to this increase. No relationship between length of interval and difference scores was found. Overall, this study demonstrated that the two instruments have strong psychometric properties and that the results obtained from current drug abusers are reliable.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.