TREATMENT OF POST-TRAUMATIC STRESS DISORDER USING AUGMENTED IMAGINATION EXPOSURE PSYCHOTHERAPY WITH VOCAL FEEDBACK: AN ACCEPTABILITY STUDY

NCT ID: NCT06129981

Last Updated: 2023-11-13

Basic Information

• Recruitment Status: NOT_YET_RECRUITING
• Clinical Phase: NA
• Total Enrollment: 30 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2023-11-30
• Study Completion Date: 2026-08-31

Brief Summary

We now have many pharmacological and psychotherapeutic treatments for patients suffering from Post Traumatic Stress Disorder (PTSD), including cognitive and behavioral therapy (CBT) by reactivation of traumatic memories. Despite remarkable initial efficacy, only one-third of patients treated with CBT show lasting clinical improvement. On the other hand, the associated drop-out rates vary from 17% to 33%, which may be linked to the difficulty of the task, which implies reactivating the traumatic memory (Bradley et al. 2005).

Alternative treatments for PTSD include blocking chemo-facilitated memory reconsolidation with a beta-blocker, propranolol. Briefly, reconsolidation theory posits that a recalled memory becomes unstable again before consolidating again into long-term memory, hence the term "reconsolidation". During this phase of transitory plasticity, the memory can be modulated, in particular its emotional charge. The use of propranolol has shown its benefit during this phase in patients suffering from PTSD (Brunet et al, 2018). However, the use of this facilitated chemo therapy is limited to patients with no contraindication to taking beta-blockers. In this context, a non-medicinal alternative to attenuate the emotional strength of the memory has a therapeutic interest.

One of the ways in which our emotional experience can be modulated is through the perception of our emotional behavior. According to the theory of self-perception (Bem, 1972) individuals become aware or conscious of their attitudes, emotions and other internal states in part by inferring them from the observation of their own behaviors. Thus when individuals produce sounds or facial expressions typical of specific emotions such as joy, sadness or anger, they will tend to experience an emotional state congruent with their vocal or facial production (Hatfield and Hsee, 1995).

Work on the influence of voice perception, in particular, is experiencing a new boom due to technical developments in the fields of acoustic signal processing. In particular, Dr. Aucouturier's team has created a software device to directly modify the emotional tone of speech formulated orally. For example, for "happy" manipulation, the pitch of the voice is changed with a pitch shifting algorithm to make it more positive, the dynamic range of the voice is increased with a compression algorithm to make it more confident, and its spectral content is modified with a high-pass filter to make it brighter. The results of this work (Aucouturier et al. 2016; Rachman et al. 2018; Goupil et al., 2021) showed an emotional vocal feedback effect: the subjective evaluation that participants make of their emotional state after modification by the device goes in the direction of the emotion created by the platform, even though the participants are typically unaware of the operated modulation. The non-detection of the transformation being a necessary condition for observing the effect of VF on the emotional state of the participant.

The rationale of this study is to test the use of a real-time vocal transformation paradigm during exposure therapy by reactivation of traumatic memory in imagination in patients. During this therapy, the patient is asked to read aloud the very detailed script of the traumatic event. We want to test whether manipulating the emotional tone of the patient's voice online, when reading, can have a facilitating impact on the process of reducing the emotional charge associated with the traumatic script. In order to justify the use of the audio headphones as well as the microphone, and to ensure us of the non-detectability of the transformation operated on the voice, we will explain to our patients that this device (hearing his voice in a headphone during the session of re-exposure to a memory) aims to increase immersion. Our main objective will be to assess the acceptability of this augmented form of psychotherapy, and our secondary objectives will be to assess its technical feasibility and provide initial elements to assess its effectiveness. The results will be compared with data from the literature on the usual treatment (imaginary exposure therapy, with or without propranolol according to the indications).

Conditions

Post-traumatic Stress Disorder

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Imaginary exposure therapy augmented by vocal feedback in patients fulfilling the criteria for PTSD

Group Type: EXPERIMENTAL

Imaginary exposure therapy augmented by vocal feedback

Intervention Type: BEHAVIORAL

The procedure specific to the study

• adding inclusion procedures (explanation of the study, verification of inclusion and non-inclusion criteria, signature of informed consent)
• including, in the usual initial V0 visit, psychometric measures specific to the study (RSDI, CGI, PMI, GEW)
• including a single usual psychotherapy session (i.e. not augmented) S1, during which the psychometric (RSDI, PMI, GEW) and psychophysiological (connected watch) measurements specific to the study are used
• adding the VF device and using psychometric (RSDI, PMI, GEW) and psychophysiological (connected watch) measurements specific to the study during psychotherapy sessions S2 to Sn (minimum S6)
• adding, during the last usual end-of-treatment visit, psychometric measures specific to the study (CGI)
• adding psychometric measures specific to the study during the usual follow-up visit at 3 months
• adding a follow-up visit at 12 months (CGI, PCL-5), either by telephone or on-site.

Interventions

Imaginary exposure therapy augmented by vocal feedback

The procedure specific to the study

• adding inclusion procedures (explanation of the study, verification of inclusion and non-inclusion criteria, signature of informed consent)
• including, in the usual initial V0 visit, psychometric measures specific to the study (RSDI, CGI, PMI, GEW)
• including a single usual psychotherapy session (i.e. not augmented) S1, during which the psychometric (RSDI, PMI, GEW) and psychophysiological (connected watch) measurements specific to the study are used
• adding the VF device and using psychometric (RSDI, PMI, GEW) and psychophysiological (connected watch) measurements specific to the study during psychotherapy sessions S2 to Sn (minimum S6)
• adding, during the last usual end-of-treatment visit, psychometric measures specific to the study (CGI)
• adding psychometric measures specific to the study during the usual follow-up visit at 3 months
• adding a follow-up visit at 12 months (CGI, PCL-5), either by telephone or on-site.

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

• Male or female over the age of 18
• Meeting DSM-5 criteria for Post-Traumatic Stress Disorder
• Presenting a PCL-5 strictly greater than 32 (PCL-5, Weathers et al., 2013)
• Giving consent by signing the consent form after clear and honest information about the study.
• Being able to understand, speak and read French

Exclusion Criteria

• Deaf, dumb or hearing aid patient
• Minors or adults under guardianship or curatorship, under judicial protection, persons deprived of liberty
• Suffering from a bipolar or psychotic disorder
• Having suffered a head trauma for less than a year or having clinical symptoms and carrying neurological sequelae
• Presenting a proven severe suicidal risk (Mini-International Neuropsychiatric Interview-Suicidality module, MINI-S and medical examination)
• Suffering from a substance use disorder (MINI-DSM5)
• Being treated for less than 2 months with antidepressants
• Not being affiliated to a social security scheme
• Pregnant or breastfeeding women

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

University Hospital, Lille

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Other Identifiers

2022-A02423-40

Identifier Type: OTHER

Identifier Source: secondary_id

2022_0525

Identifier Type: -

Identifier Source: org_study_id