| Sumario: | Objective: To determine phobic and nonphobic subject response to a provocative threat stimulus and to determine variables that confound the response. Design: Randomized blind examiner test-retest of randomized phobic and control subjects with qualitative, semistructured, informal postintervention interview. Setting: Private chiropractic clinic. Subjects: Thirteen phobic individuals, as determined by the Diagnostic and Statistical Manual of Mental Disorders, Third Edition -- Revised (DSM-III-R), and 14 control volunteer subjects. Intervention: Manual muscle testing was performed while each subject viewed a threat stimulus (i.e., a cue word on a printed card). The results were recorded as 'weak' or 'strong.' Results: The analysis of data demonstrates poor inter- (K = -0.19) and intraexaminer reliability (K = -0.14- +0.29) The test for independence for valid muscle testing was strong for both examiners (p = .462, p = 1.00). When confounding variables were corrected for, the validity of muscle testing increased to 91%. Conclusion: This preliminary inquiry demonstrates the need for musculoskeletal, attentional and presensitized subject variables to be controlled to ascertain if muscle testing can be reliably used as a tool to identify emotional arousal.
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