An investigation of appraisals in individuals vulnerable to excessive worry: the role of intolerance of uncertainty

American Psychiatric Association (2000). Diagnostic and statistical manual of mental disorders (4th ed., text revision). Washington, DC: Author.

Baron, R. M., & Kenny, D. A. (1986). The moderator-mediator variable distinction in social psychological research: Conceptual, strategic, and statistical consideration. Journal of Personality and Social Psychology, 51, 1173–1182.

Beck, A. T., & Clark, D. A. (1997). An information processing model of anxiety: Automatic and strategic processes. Behaviour Research and Therapy, 35, 49–58.

Beck, A. T., Epstein, N., Brown, G., & Steer, R. A. (1988). An inventory for measuring clinical anxiety: Psychometric properties. Journal of Consulting and Clinical Psychology, 56, 893–897.

Bernstein, A., Zvolensky, M. J., Kotov, R., Arrindell, W. A., Taylor, S., Bonifacio, S., et al. (2006). Taxonicity of anxiety sensitivity: A multi-national analysis. Journal of Anxiety Disorders, 20, 1–22.

Borkovec, T. D. (2006). Applied relaxation and cognitive therapy for pathological worry and generalized anxiety disorder. In G. C. L. Davey, & A. Wells (Eds.), Worry and its psychological disorders: Theory, assessment and treatment (pp. 273–287). Chichester, England: Wiley.

Buhr, K., & Dugas, M. J. (2002). The Intolerance of Uncertainty Scale: Psychometric properties of the English version. Behaviour Research and Therapy, 40, 931–945.

Buhr, K., & Dugas, M. J. (2006). Investigating the construct validity of intolerance of uncertainty and its unique relationship with worry. Journal of Anxiety Disorders, 20, 222–236.

Creamer, M., Foran, J., & Bell, R. (1995). The Beck Anxiety Inventory in a non-clinical sample. Behaviour Research and Therapy, 33, 477–485.

Davey, G. C. L., Hampton, J., Farrell, J., & Davidson, S. (1992). Some characteristics of worrying: Evidence for worrying and anxiety states as separate constructs. Personality and Individual Differences, 13, 133–147.

Davey, G. C. L., & Levy, S. (1998). Catastrophic worrying: Personal inadequacy and a perseverative iterative style as features of the catastrophizing process. Journal of Abnormal Psychology, 107, 576–586.

Dugas, M. J., Freeston, M. H., Doucet, C., Lachance, S., & Ladouceur, R. (1995). Structured versus free-recall measures: Effect on report of worry themes. Personality and Individual Differences, 18, 355–361.

Dugas, M. J., Freeston, M. H., & Ladouceur, R. (1995, October). Validation de mesures des mécanismes liés à l’inquiétude [Validation of measures of mechanisms associated with worry]. Poster presented at Société québecoise pour la recherche en psychologie, Ottawa, ON.

Dugas, M. J., Freeston, M. H., & Ladouceur, R. (1997). Intolerance of uncertainty and problem orientation in worry. Cognitive Therapy and Research, 21, 593–606.

Dugas, M. J., Freeston, M. H., Ladouceur, R., Rhéaume, J., Provencher, M., & Boisvert, J.-M. (1998a). Worry themes in primary GAD, secondary GAD, and other anxiety disorders. Journal of Anxiety Disorders, 12, 253–261.

Dugas, M. J., Freeston, M. H., Provencher, M. D., Lachance, S., Ladouceur, R., & Gosselin, P. (2001). Le questionnaire sur l’inquiétude et l’anxiété: Validation dans des échantillons non cliniques et cliniques [The Worry and Anxiety Questionnaire: Validation in nonclinical and clinical samples]. Journal de Thérapie Comportementale et Cognitive, 11, 31–36.

Dugas, M. J., Gagnon, F., Ladouceur, R., & Freeston, M. H. (1998b). Generalized anxiety disorder: A preliminary test of a conceptual model. Behaviour Research and Therapy, 36, 215–226.

Dugas, M. J., Gosselin, P., & Ladouceur, R. (2001). Intolerance of uncertainty and worry: Investigating specificity in a nonclinical sample. Cognitive Therapy and Research, 25, 551–558.

Dugas, M. J., Hedayati, M., Karavidas, A., Buhr, K., Francis, K., & Phillips, N. A. (2005a). Intolerance of uncertainty and information processing: Evidence of biased recall and interpretations. Cognitive Therapy and Research, 29, 57–70.

Dugas, M. J., & Koerner, N. (2005). Cognitive-behavioral treatment for generalized anxiety disorder: Current status and future directions. Journal of Cognitive Psychotherapy, 19, 61–81.

Dugas, M. J., & Ladouceur, R. (2000). Treatment of GAD: Targeting intolerance of uncertainty in two types of worry. Behavior Modification, 24, 635–657.

Dugas, M. J., Ladouceur, R., Léger, E., Freeston, M. H., Langlois, F., Provencher, M. D., et al. (2003). Group cognitive-behavioral therapy for generalized anxiety disorder: Treatment outcome and long-term follow-up. Journal of Consulting and Clinical Psychology, 71, 821–825.

Dugas, M. J., Langlois, F., Rhéaume, J., & Ladouceur, R. (1998c, November). Intolerance of uncertainty and worry: Investigating causality. In J. Stöber (chair), Worry: New findings in applied and clinical research. Washington, DC: Symposium: Association for Advancement of Behavior Therapy.

Dugas, M. J., Marchand, A., & Ladouceur, R. (2005b). Further validation of a cognitive-behavioral model of generalized anxiety disorder: Diagnostic and symptom specificity. Journal of Anxiety Disorders, 19, 329–343.

Dugas, M. J., & Robichaud, M. (2007). Cognitive-behavioral treatment for generalized anxiety disorder: From science to practice. New York: Routledge.

Dugas, M. J., Savard, P., Gaudet, A., Turcotte, J., Laugesen, N., Robichaud, M., et al. (in press). Can the components of a cognitive model predict the severity of generalized anxiety disorder? Behavior Therapy.

Eysenck, M. W., Mogg, K., May, J., Richards, A., & Mathews, A. (1991). Bias in interpretation of ambiguous sentences related to threat in anxiety. Journal of Abnormal Psychology, 100, 144–150.

Fisher, P. L. (2006). The efficacy of psychological treatments for generalised anxiety disorder? In G. C. L. Davey, & A. Wells (Eds.), Worry and its psychological disorders: Theory, assessment and treatment (pp. 359–377). Chichester, England: Wiley.

Freeston, M. H., Rhéaume, J., Letarte, H., Dugas, M. J., & Ladouceur, R. (1994). Why do people worry? Personality and Individual Differences, 17, 791–802.

Garber, J., & Hollon, S. D. (1991). What can specificity designs say about causality in psychopathology research? Psychological Bulletin, 110, 129–136.

Hedayati, M., Dugas, M. J., Buhr, K., & Francis, K. (2003, November). The relationship between intolerance of uncertainty and the interpretation of ambiguous and unambiguous information. Poster presented at the annual convention of the Association for the Advancement of Behavior Therapy, Boston, MA.

Holaway, R. M., Heimberg, R. G., Coles, M. E. (2006). A comparison of intolerance of uncertainty in analogue obsessive-compulsive disorder and generalized anxiety disorder. Journal of Anxiety Disorders, 20, 158–174.

Ingram, R. E. (2003). Origins of cognitive vulnerability to depression. Cognitive Therapy and Research, 27, 77–88.

Ingram, R. E., Miranda, J., & Segal, Z. (2006). Cognitive vulnerability to depression. In L. B. Alloy, & J. H. Riskind (Eds.), Cognitive vulnerability to emotional disorders (pp. 63–91). NJ: Lawrence Erlbaum Associates.

Koerner, N., & Dugas, M. J. (2006). A cognitive model of generalized anxiety disorder: The role of intolerance of uncertainty. In G. C. L. Davey, & A. Wells (Eds.), Worry and its psychological disorders: Theory, assessment and treatment (pp. 201–216). Chichester, England: Wiley.

Kraemer, H. C., Kazdin, A. E., Offord, D. R., Kessler, R.C., Jensen, P.S., & Kupfer, D.J. (1997). Coming to terms with the terms of risk. Archives of General Psychiatry, 54, 337–343.

Lachance, S., Ladouceur, R., & Dugas, M. J. (1999). Elements explaining the tendency towards uncertainty. Applied Psychology: An International Review, 48, 187–196.

Ladouceur, R., Dugas, M. J., Freeston, M. H., Léger, E., Gagnon, F., & Thibodeau, N. (2000). Efficacy of a cognitive-behavioral treatment for generalized anxiety disorder: Evaluation in a controlled clinical trial. Journal of Consulting and Clinical Psychology, 68, 957–964.

Ladouceur, R., Dugas, M. J., Freeston, M. H., Rhéaume, J., Blais, F., Boisvert, J.-M., et al. (1999). Specificity of generalized anxiety disorder symptoms and processes. Behavior Therapy, 30, 191–207.

Ladouceur, R., Gosselin, P., & Dugas, M. J. (2000). Experimental manipulation of intolerance of uncertainty: A study of a theoretical model of worry. Behaviour Research and Therapy, 38, 933–941.

Lauriola, M., & Levin, I. P. (2001). Relating individual differences in attitude toward ambiguity to risky choices. Journal of Behavioral Decision Making, 14, 107–122.

Lipshitz, R., & Strauss, O. (1997). Coping with uncertainty: A naturalistic decision-making analysis. Organizational Behavior and Human Decision Processes, 69, 149–163.

Loewenstein, G., Weber, E. U., Hsee, C. K., & Welch, N. (2001). Risk as feelings. Psychological Bulletin, 127, 267–286.

MacCallum, R. C., Zhang, S., Preacher, K. J., & Rucker, D. D. (2002). On the practice of dichotomization of quantitative variables. Psychological Methods, 7, 19–40.

MacLeod, C., & Rutherford, E. (2004). Information processing approaches: Assessing the selective functioning of attention, interpretation, and retrieval. In R. G. Heimberg, C. L. Turk, & D. S. Mennin (Eds.), Generalized anxiety disorder: Advances in research and practice (pp. 109–142). New York: Guilford.

Meng, X.-L., Rosenthal, R., & Rubin, D. B. (1992). Comparing correlated correlation coefficients. Psychological Bulletin, 111, 172–175.

Metzger, R. L., Miller, M. L., Cohen, M., Sofka, M., & Borkovec, T. D. (1990). Worry changes decision making: The effect of negative thoughts on cognitive processing. Journal of Clinical Psychology, 46, 78–88.

Meyer, T. J., Miller, M. L., Metzger, R. L., & Borkovec, T. D. (1990). Development and validation of the Penn State Worry Questionnaire. Behaviour Research and Therapy, 28, 487–495.

Molina, S., & Borkovec, T. D. (1994). The Penn State Worry Questionnaire: Psychometric properties and associated characteristics. In G. C. L. Davey, & F. Tallis (Eds.), Worrying: Perspectives on theory, assessment, and treatment (pp. 265–283). New York: Wiley.

Preacher, K. J., Rucker, D. D., MacCallum, R. C., & Nicewander, W. A. (2005). Use of the extreme groups approach: A critical reexamination and new recommendations. Psychological Methods, 10, 178–192.

Radloff, L. S. (1977). The CES-D Scale: A self-report depression scale for research in the general population. Applied Psychological Measurement, 1, 385–401.

Rassin, E., & Muris, P. (2005). Indecisiveness and the interpretation of ambiguous situations. Personality and Individual Differences, 39, 1285–1291.

Richards, J. C., Austin, D. W., & Alvarenga, M. E. (2001). Interpretation of ambiguous interoceptive stimuli in panic disorder and nonclinical panic. Cognitive Therapy and Research, 25, 235–246.

Riskind, J. H., & Allow, L. B. (2006). Cognitive vulnerability to emotional disorders: Theory and research design/methodology. In L. B. Alloy, & J. H. Riskind (Eds.), Cognitive vulnerability to emotional disorders (pp. 1–29). NJ: Lawrence Erlbaum Associates.

Roberts, N. M., Gervais, N. J., & Dugas, M. J. (2006, June). Intolerance of uncertainty in analogue generalized anxiety disorder and obsessive-compulsive disorder: Replication and extension. Poster presented at the annual convention of the Canadian Psychological Association, Calgary, AB, Canada.

Robichaud, M., & Dugas, M. J. (2005). Negative problem orientation (Part II): Construct validity and specificity to worry. Behaviour Research and Therapy, 43, 403–412.

Robichaud, M., & Dugas, M. J. (2006). A cognitive—behavioral treatment targeting intolerance of uncertainty. In G. C. L. Davey, & A. Wells (Eds.), Worry and its psychological disorders: Theory, assessment and treatment (pp. 289–304). Chichester, England: Wiley.

Sexton, K. A., Norton, P. J., Walker, J. R., & Norton, G. R. (2003). Hierarchical model of generalized and specific vulnerabilities in anxiety. Cognitive Behaviour Therapy, 32, 82–94.

Sibrava, N. J., & Borkovec, T. D. (2006). The cognitive avoidance theory of worry. In G. C. L. Davey, & A. Wells (Eds.), Worry and its psychological disorders: Theory, assessment and treatment (pp. 239–256). Chichester: Wiley.

Stöber, J., & Joormann, J. (2001). A short form of the Worry Domains Questionnaire: Construction and factorial validation. Personality and Individual Differences, 31, 591–598.

Tallis, F., Eysenck, M. W., & Mathews, A. (1992). A questionnaire for the measurement of nonpathological worry. Personality and Individual Differences, 13, 161–168.

Teachman, B. A. (2005). Information processing and anxiety sensitivity: Cognitive vulnerability to panic reflected in interpretation and memory biases. Cognitive Therapy and Research, 29, 479–499.

van Dijk, E., & Zeelenberg, M. (2003). The discounting of ambiguous information in economic decision-making. Journal of Behavioral Decision Making, 16, 341–352.

Wells, A. (2006a). The metacognitive model of worry and generalised anxiety disorder. In G. C. L. Davey, & A. Wells (Eds.), Worry and its psychological disorders: Theory, assessment and treatment (pp. 179–199). Chichester, England: Wiley.

Wells, A. (2006b). Metacognitive therapy for worry and generalised anxiety disorder. In G. C. L. Davey, & A. Wells (Eds.), Worry and its psychological disorders: Theory, assessment and treatment (pp. 259–272). Chichester, England: Wiley.