“…In previous years, the evaluation of psychological impact of treatment upon the offender was measured using attitudinal scales, such as the Abel and Becker Cognitive Distortions Scale (Abel et al, 1984). There has been a great deal of criticism surrounding tests such as these, in that the ''desirable'' responses are obvious to the offender when offered a choice between this and a clearly socially unacceptable alternative (Horley & Quinsey, 1994). In addition, Swaffer, Hollin, Beech, Beckett, and Fisher (1999) found that offenders tended to score on the upper side of the scoring continuum (i.e., most strongly disagreeing with the undesirable item), suggesting a socially desirable style of response, i.e., not necessarily honest.…”