Dyadic developmental psychotherapy was developed by psychologist Daniel Hughes, described by the Task Force as a "leading attachment therapist". Hughes' website gave a list of attachment therapy techniques, repeated by the APSAC Task Force from an earlier website, which he stated do not or should not form part of dyadic developmental psychotherapy, which the Task Force took as a description of attachment therapy techniques. Two studies on dyadic developmental psychotherapy have been published by Becker-Weidman, the second being a four-year follow up of the first. Prior and Glaser state Hughes' therapy reads as good therapy for abused and neglected children, though with "little application of attachment theory", but the advocacy group ACT and the Task Force place Hughes within the attachment therapy paradigm.