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  • Does a visual-perceptual disturbance characterize trauma-related anxiety syndromes?

    Author(s)
    Tym, R
    Dyck, MJ
    McGrath, G
    Griffith University Author(s)
    Dyck, Murray J.
    Year published
    2000
    Metadata
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    Abstract
    The i-test was developed to assess the visual-perceptual disturbances (VPDs) frequently reported by anxious patients. Persons with the disturbance report a specific abnormal illusion of movement when they maintain a fixed gaze at the i-test stimulus. Base rates for positive responses to the i-test and for reports of a “recurrent specific memory” (RSM) of a fear experience were obtained in psychiatric outpatient View the MathML source and community View the MathML source samples. In each case, approximately one fifth of participants had a positive response to the i-test and one fifth of participants reported an RSM of fear. ...
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    The i-test was developed to assess the visual-perceptual disturbances (VPDs) frequently reported by anxious patients. Persons with the disturbance report a specific abnormal illusion of movement when they maintain a fixed gaze at the i-test stimulus. Base rates for positive responses to the i-test and for reports of a “recurrent specific memory” (RSM) of a fear experience were obtained in psychiatric outpatient View the MathML source and community View the MathML source samples. In each case, approximately one fifth of participants had a positive response to the i-test and one fifth of participants reported an RSM of fear. A positive response to the i-test is observed in women more frequently than in men. Among psychiatric patients, approximately 90% of patients who report one symptom also report the other symptom; among community members, the concordance rate is approximately 33%. When psychiatric patients with both an abnormal illusion of movement response and an RSM of trauma are treated with eye movement desensitization, both symptoms are removed in 70% of cases; when these patients undergo some other form of treatment, both symptoms are removed in 30% of cases. These results indicate that the i-test is an effective way of identifying VPDs associated with psychopathologic conditions; the association between the abnormal illusion of movement and reports of recurrent specific memories of fear experiences suggests that the VPD may be a marker of traumatic stress syndromes.
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    Journal Title
    Journal of Anxiety Disorders
    Volume
    14
    DOI
    https://doi.org/10.1016/S0887-6185(00)00029-3
    Subject
    Clinical sciences
    Publication URI
    http://hdl.handle.net/10072/58141
    Collection
    • Journal articles

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