What does ipsative measurement compare?

Ipsative measurement specifically involves comparing an individual's current scores with their own previous scores. This method focuses on the self-assessment and personal growth of an individual, allowing one to track progress over time within their own performance metrics. It is particularly useful in settings where understanding personal changes and development is essential, such as in educational or therapeutic contexts.

In contrast, the other options focus on comparisons that do not align with the ipsative approach. Comparing scores of different individuals involves normative measurement, where an individual's performance is measured against a group, rather than their own prior performance. Group performance over time involves an aggregate or cohort analysis, assessing trends and changes across a set of individuals rather than personal change. Scores on national assessments typically compare individual or group performance against a broader national standard, which is also not focused on personal progress but rather on how one performs against a larger population. Thus, the focus of ipsative measurement is uniquely on the individual’s own journey and evolution in scores.