In the IRR study, four raters were placed into 6 teams of two to establish reliability between individuals in each
team. Intra-Class Correlation (ICC) results showed a high inter-rater reliability with ICC average ratings of 0.882–0.998 between
individual raters of each team. Culturally relevant norms were developed for the NHPT using a sample of 180 participants
(females, n = 90 and males, n = 90) ranging in age from 18 to 60 years. The data from the 1st trials were analyzed between age
categories of both 5 and 10-year increments. Normative data was found to be clinically significant across collapsed age groups:
18–39, 40–49, and 50–60 years of age for each gender.