Spider Phobia Clinical Trial
Official title:
One-session Treatment for Spider Fears
Despite the efficacy of exposure and response prevention (ERP) for anxiety and phobias, recent theoretical research on fear extinction via inhibitory learning suggests that cognitive restructuring (CR)--the explicit challenging of maladaptive beliefs (e.g,. overestimation of threat)--may actually attenuate exposure outcomes during an exposure trial. That is, by verbally disputing certain beliefs (e.g., "the spider will jump on me and attack me and I will faint from the anxiety") before an exposure task (e.g., gradually approaching a non-venomous spider), anxious individuals may experience less "surprise" from the non-occurrence of feared outcomes, and consequently experience less inhibitory learning (e.g., learning that spiders are not inherently dangerous). Thus, the investigators aim to empirically test the conventional (yet recently challenged) assumption that cognitive restructuring is a necessary component for psychosocial interventions for phobias. 90 participants recruited from the Psychology Department Participant Pool and the community will participate in this study. All participants will meet DSM-5 criteria for spider phobia. Following consent, participants will complete a pre-test assessment of various aspects of spider phobia. Participants will then receive education about the nature of anxiety/spider phobia and be randomly assigned to one of three 45-min intervention conditions: (a) CR before EXP, (b) EXP before CR, and (c) stress management (a control condition that involves neither CR nor EXP). Following the intervention, participants will complete a 10-minute post-test assessment and be scheduled to return for a follow-up assessment a month later.
Recent conceptualizations of the mechanisms by which exposure therapy (EXP; i.e., confronting one's fear in a systematic and therapeutic way) works in the treatment of phobias focus on the importance of extinction learning). This "inhibitory learning model" proposes that EXP helps the phobic individual learn that phobic stimuli are not dangerous; yet older danger-related learning is not "erased", and so must be inhibited by the new "safety learning." Research indicates that incorporating surprise into EXP (e.g., the patient is surprised that the spider didn't bite) maximizes this type of inhibitory learning and would correspond to better outcomes for phobias then when there is no surprise at the outcome of EXP. Traditionally, EXP is used with the addition of cognitive restructuring (CR), which involves discussing and disputing exaggerated beliefs that underlie one's fears (e.g., "spiders are very dangerous"). CR encourages phobic individuals to re-evaluate their expectations of danger when encountering phobic stimuli, and therefore might rob the individual of the opportunity to be surprised when actually facing their fear. Despite the theoretical plausibility of the importance of surprise during EXP, this question has yet to be investigated empirically. The aim of the present study is to test the hypothesis that incorporating surprise into EXP (by postponing CR until after EXP) will enhance immediate and long-term outcome of EXP for spider phobia. ;
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