Precursor to this belief formation pinpointed by Salkovskis, Richards, and Forrester (1995) is a sense of personal responsibility or agency that Carbonyl cyanide 4-(trifluoromethoxy)phenylhydrazone web emerges in tandem with intrusive thoughts. This sense of personal agency confers an inflated sense of authorship over event get IRC-022493 outcomes, which has been viewed as a reversal of the omission bias (e.g., doing nothing yields a stronger as opposed to a weaker sense of personal responsibility for an outcome). Heightened responsibility is then lessened via neutralization and other compulsive acts or rituals (Salkovskis et al., 1995).Author Manuscript Author Manuscript Author Manuscript Author ManuscriptThought ction Fusion ScaleThe first attempt at operationalization and psychometric exploration of TAF occurred with the development of the Responsibility Appraisal Questionnaire (Rachman, Thordarson, Shafran, Woody, 1995). Using a sample of Canadian psychology undergraduates (N = 291), the investigators sought to develop a reliable measure of perceived responsibility devoid of items of overt OCD symptoms. One of the five content areas contained four items measuring TAF (e.g., “For me, having a mean thought is as bad as doing something mean”), and the principal components analysis (PCA) erived TAF component (Cronbach’s = .51) was moderately associated with obsessive symptoms as measured by the Inventory of Beliefs Related to Obsessionality (r = .50), the Maudsley Obsessional Compulsive Inventory (MOCI; r = .45), as well as state and trait guilt (rs = .34 and .37, respectively). The investigators thus implicated the role of TAF in OCD, observing that distressing cognitive intrusions can exacerbate guilt if there is a belief that thinking something negative is tantamount to acting on it (Rachman et al., 1995). The advent of the Thought ction Fusion Scale (TAFS; Shafran, Thordarson, Rachman, 1996) followed closely after the Responsibility Appraisal Questionnaire study (Rachman et al., 1995). Elaboration of the TAF construct was based on clinical observations that intrusive thoughts may elicit a heightened sense of personal responsibility surrounding moral and probabilistic themes, and the TAFS was explicitly designed with these dimensions in mind (Shafran et al., 1996). Specifically, the moral thematic content, or TAF-M, refers to the confusion between thinking about and actually committing morally questionable acts, such as the belief that having thoughts of violence toward others is equally as reprehensible as physically committing them. The probabilistic content, or TAF-L, refers to the conflation ofAssessment. Author manuscript; available in PMC 2015 May 04.Meyer and BrownPagethought and likelihood of event occurrence, such as the belief that thinking about harm befalling a friend increases the probability that harm will occur in reality. This example refers to a specific type of TAF-L designated Likelihood-Other (TAF-LO) because the thought is about someone else. Probabilistic confusion about harm befalling oneself, for example, would be subsumed under Likelihood-Self (TAF-LS; Shafran et al., 1996). Using an undergraduate student sample (n = 190), Shafran et al. (1996) conducted a PCA of the 19-item TAFS, which yielded three components (TAF-M, TAF-LS, and TAF-LO). However, this study also showed that a two-component solution (TAF-M and TAF-L) best characterized the data from a sample of community participants (n = 147) who endorsed OCD symptoms as defined by exceeding a cutoff score of 11 on the MOC.Precursor to this belief formation pinpointed by Salkovskis, Richards, and Forrester (1995) is a sense of personal responsibility or agency that emerges in tandem with intrusive thoughts. This sense of personal agency confers an inflated sense of authorship over event outcomes, which has been viewed as a reversal of the omission bias (e.g., doing nothing yields a stronger as opposed to a weaker sense of personal responsibility for an outcome). Heightened responsibility is then lessened via neutralization and other compulsive acts or rituals (Salkovskis et al., 1995).Author Manuscript Author Manuscript Author Manuscript Author ManuscriptThought ction Fusion ScaleThe first attempt at operationalization and psychometric exploration of TAF occurred with the development of the Responsibility Appraisal Questionnaire (Rachman, Thordarson, Shafran, Woody, 1995). Using a sample of Canadian psychology undergraduates (N = 291), the investigators sought to develop a reliable measure of perceived responsibility devoid of items of overt OCD symptoms. One of the five content areas contained four items measuring TAF (e.g., “For me, having a mean thought is as bad as doing something mean”), and the principal components analysis (PCA) erived TAF component (Cronbach’s = .51) was moderately associated with obsessive symptoms as measured by the Inventory of Beliefs Related to Obsessionality (r = .50), the Maudsley Obsessional Compulsive Inventory (MOCI; r = .45), as well as state and trait guilt (rs = .34 and .37, respectively). The investigators thus implicated the role of TAF in OCD, observing that distressing cognitive intrusions can exacerbate guilt if there is a belief that thinking something negative is tantamount to acting on it (Rachman et al., 1995). The advent of the Thought ction Fusion Scale (TAFS; Shafran, Thordarson, Rachman, 1996) followed closely after the Responsibility Appraisal Questionnaire study (Rachman et al., 1995). Elaboration of the TAF construct was based on clinical observations that intrusive thoughts may elicit a heightened sense of personal responsibility surrounding moral and probabilistic themes, and the TAFS was explicitly designed with these dimensions in mind (Shafran et al., 1996). Specifically, the moral thematic content, or TAF-M, refers to the confusion between thinking about and actually committing morally questionable acts, such as the belief that having thoughts of violence toward others is equally as reprehensible as physically committing them. The probabilistic content, or TAF-L, refers to the conflation ofAssessment. Author manuscript; available in PMC 2015 May 04.Meyer and BrownPagethought and likelihood of event occurrence, such as the belief that thinking about harm befalling a friend increases the probability that harm will occur in reality. This example refers to a specific type of TAF-L designated Likelihood-Other (TAF-LO) because the thought is about someone else. Probabilistic confusion about harm befalling oneself, for example, would be subsumed under Likelihood-Self (TAF-LS; Shafran et al., 1996). Using an undergraduate student sample (n = 190), Shafran et al. (1996) conducted a PCA of the 19-item TAFS, which yielded three components (TAF-M, TAF-LS, and TAF-LO). However, this study also showed that a two-component solution (TAF-M and TAF-L) best characterized the data from a sample of community participants (n = 147) who endorsed OCD symptoms as defined by exceeding a cutoff score of 11 on the MOC.