RESULTS:
A total of 241 patients completed the S-HTP (S-HTP group) and 22 patients were not able to complete the S-HTP, but did complete the HTP (an original version of the S-HTP) or tree test (HTP group). Significantly more people in the HTP group had autism spectrum disorder (ASD) compared with the S-HTP group. Full-scale intelligence quotient was significantly lower in the HTP group compared with the S-HTP group.