“…He also states that the use of HFDs may persist due to the process of partial reinforcement--a match between drawing interpretations and behavior will sometimes be found merely by chance. Kamphaus and Pleiss (1993), in their response to the review by Motta et al (1993a), add that since evidence of reliability has been found for some scoring systems, many users may assume that this means that the validity of the measure has also been demonstrated. In their response to reviewers, Motta, Little, and Tobin (1993b) add the possibility of confirmatory bias as a reason for the continued use of HFDs.…”