The Behaviour Support Plan Content Appraisal Tool (BSP-CAT): A New Tool for Assessing and Improving the Quality of Behavioural Support Plans.

Validity was not formally assessed, so it is unknown whether the tool actually measures plan quality accurately. The final version of the tool was changed after the reliability data were collected, so the reported reliability applies to the earlier version. All participants had prior PBS experience, so the tool's consistency is unknown for less experienced users. Plans were chosen opportunistically from services that already had them, which may not represent typical practice. The study was conducted in UK community services, so applicability to other countries or settings is untested.

The authors declare no conflicts of interest. Funding was provided by the Sharland Foundation Developmental Disabilities Applied Behavioural Research and Impact Network, the University of Birmingham, and University College London.

Do not treat the moderate inter-rater agreement as a minor technical detail. Two practitioners scoring the same plan disagreed moderately on the total score, so the tool is not yet reliable enough for formal performance management or research outcomes without further validation.