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Automatic processes in hair pulling disorder


- candidate number17495
- NTR NumberNTR4522
- ISRCTNISRCTN no longer applicable
- Date ISRCTN created
- date ISRCTN requested
- Date Registered NTR15-apr-2014
- Secondary IDs2011/262 CCMO
- Public TitleAutomatic processes in hair pulling disorder
- Scientific TitleImplicit processes in the treatment of trichotillomania
- ACRONYM
- hypothesisThe implicit training (AAT) added to standard behaviour therapy will reduce relapse rates after treatment when compared to the control group.
- Healt Condition(s) or Problem(s) studiedTrichotillomania (hair pulling disorder)
- Inclusion criteriaThe inclusion criteria are an age between 18 and 65 and a current primary diagnosis of TTM.
- Exclusion criteriaExclusion criteria are a current psychotic episode, substance abuse disorder, and an inability to speak and understand Dutch. Patients who refuse the computer training are also excluded from the study. They are offered standard behaviour therapy, however.
- mec approval receivedno
- multicenter trialno
- randomisedyes
- masking/blindingDouble
- controlActive
- groupFactorial
- Type2 or more arms, randomized
- Studytypeintervention
- planned startdate 1-sep-2011
- planned closingdate31-mei-2014
- Target number of participants78
- InterventionsBehaviour therapy

Plus either implicit training aimed at decreasing an approach bias towards hair pulling, or a general implicit training
- Primary outcomeThe main study parameters are:
- Implicit action tendencies to hair pulling-related stimuli
- Severity and frequency of hair pulling
- Relapse
- Secondary outcome- Response inhibition
- Urge and resistance with respect to hair pulling
- Self-control cognitions
- Attentional biases towards hair pulling-related stimuli
- Implicit evaluations of hair pulling-related stimuli
- TimepointsBefore training, after training/before therapy, after therapy, 1, 3 and 12 month follow-up
- Trial web site
- statusopen: patient inclusion
- CONTACT FOR PUBLIC QUERIES J. Maas
- CONTACT for SCIENTIFIC QUERIES J. Maas
- Sponsor/Initiator Ambulatorium Kinder, Jeugd en Jongvolwassenen (Radboud University)
- Funding
(Source(s) of Monetary or Material Support)
Radboud University Nijmegen
- PublicationsThis study will result in two possible publications: one about the treatment data (difference in relapse between the groups) and one about the implicit data (pre-treatment differences and training effects before behaviour therapy)
- Brief summaryRationale: The present study investigates implicit processes in trichotillomania (TTM). Previous research has shown that different implicit biases are found in unwanted habitual behaviour. In a study by Wiers, Eberl, Rinck, Becker, & Lindenmeyer on severe alcoholics (2011) an implicit training targeting action tendencies was added to standard treatment. Alcoholics that received training showed significantly less relapse one year after treatment. Adding this implicit training component to standard treatment may improve long-term treatment outcome in TTM also.
Objective: The primary objective of this study is to investigate whether adding the implicit training component to standard treatment improves long-term treatment effects in patients suffering from TTM. The second goal is to contribute to the knowledge about TTM and unwanted habits in general and investigate the underlying mechanisms of unwanted habits to improve future psychological treatment possibilities.
- Main changes (audit trail)
- RECORD15-apr-2014 - 8-mei-2014


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