Scoring the CPRS-R:L is not a simple arithmetic sum. It requires converting raw scores to T-scores using specific gender and age norms.
A T-Score is a standardized score with a mean (average) of 50 and a standard deviation of 10. This statistical transformation allows us to compare the child’s results against a normative sample (a representative group of children of the same age and gender).
The Conners Manual contains extensive tables broken down by: how to score conners 39- parent rating scale-revised l
The Conners 39 (often referred to technically as the CPRS-R:L) consists of . For each item, the parent is asked to rate how often their child exhibits a specific behavior. The rating scale is a 4-point Likert scale:
: Ensure you use the correct normative table for the child's age and gender , as expectations for behavior vary by developmental stage. Software/Templates : Professionals often use autoscoring templates Scoring the CPRS-R:L is not a simple arithmetic sum
The 80 items are grouped into empirically derived subscales. Do not guess—use the official scoring template or overlay key. The standard subscales for the CPRS-R:L include:
The first step in scoring is ensuring the integrity of the raw data. Before any calculations begin, the administrator must check the completed questionnaire for completeness. This statistical transformation allows us to compare the
Always cite the SEM. For the CPRS-R:L, the SEM for most subscales is 3–5 T-score points. Therefore, a T-score of 62 is not meaningfully different from 65. Do not over-interpret marginal differences.