Inter- and Intra-rater Reliability of the Head Control Scale: Brief Report.

Purpose: To examine inter-rater and intra-rater reliability of the Head Control Scale (HCS).

Methods: Introduction of the HCS to eight physical therapists in a pediatric post-acute hospital was followed by use in a repeated-measures design across two trials to establish reliability of the raters. Therapists scored the HCS twice within 4 weeks, using videos of infants at both 2 and 6 months of age, one infant described as typically developing and one with atypical development.