Investigating the reliability and validity of the Cognitive Process Profile (CPP).
May 20, 2014
How do we assess the reliability of an assessment which, by its very nature, precludes re‐assessment within a period of time where familiarity of what was undertaken previously will distort future performance on the assessment? This is the conundrum facing investigation of reliability of the CPP.
When we investigate validity, we have two questions to answer, the first is concerned entirely with measurement, the second with meaning:
- Does the test measure what it claims to measure?
- Does the test score show the expected relationships with other theoretically‐relevant scores, behaviours, and outcomes?