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Taking Open Label Placebo Further: Trial of Imaginary Pills in Test Anxiety

Taking Open Label Placebo Further: Randomized Controlled Trial of Imaginary Pills in Test Anxiety

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04250571
Enrollment
177
Registered
2020-01-31
Start date
2020-03-06
Completion date
2021-07-31
Last updated
2023-08-25

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Test Anxiety

Keywords

imaginary pills, open label placebo (OLP) treatment, placebo

Brief summary

Employing imaginary pills could offer a new way of investigating underlying mechanisms of open label placebo (OLP) treatment by eliminating the physical treatment constituent (i.e., the pill itself). This can reveal the power of the purely psychological component of a placebo and gives insights into underlying mechanisms of placebo effects. The aim of the project is to assess possible effects of an imaginary pill in comparison to no treatment, and open label placebo treatment in subjects with test anxiety. Interventions (seven to three weeks before the exam) will be held online using a video Chat application such as zoom (https://zoom.us/) or skype (https://www.skype.com/de/) or will take place at the division of Clinical Psychology and Psychotherapy, University of Basel (Missionsstrasse 62, 4055 Basel).

Interventions

OTHERinformation about No treatment group

Participants will receive no pills and will be told that they are in the no treatment group

OTHERimaginary pill technique

Participants will be instructed to take an imagined pill. This instruction consists of a procedure including five steps (i.e., identifying the IP sensitive problem, building trust/belief/reality of the IP, constructing a personally meaningful IP, taking the IP, suggestions for self-administering the IP in real life, and building adherence). Participants in this group receive daily e-mail reminders.

Participants will have the information that they are receiving inert pills (i.e. P-Dragees, containing Placebo), combined with the following scientific rationale: (a) deceptive as well as open label placebos have been found to be effective in relieving symptoms in a variety of clinical conditions namely anxiety, depression, chronic pain (the placebo effect is powerful), (b) classical conditioning are one of the possible mechanism of this effect (the body automatically responds), (c) positive expectations may help but are not necessary, (suspend disbelief), (d) compliance with these instructions are important for outcome (taking the pills faithfully is important). Participants in this group receive daily e-mail reminders.

Sponsors

Prof. Dr., Jens Gaab, Division of Clinical Psychology and Psychotherapy, University of Basel, Switzerland
CollaboratorUNKNOWN
Emer. Prof. Dr., Irving Kirsch, Universities of Hull and Plymouth, United Kingdom, and University of Connecticut, USA
CollaboratorUNKNOWN
Cand. psych., Niels Bagge, Institut for Emotionsfokuseret Terapi, Roskilde, Denmark
CollaboratorUNKNOWN
Asst. Prof. Dr., Claudia Carvalho, Department of Clinical and Health Psychology ISPA, Lisbon, Portugal
CollaboratorUNKNOWN
Dr. phil., Cosima Locher, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
CollaboratorUNKNOWN
University Hospital, Basel, Switzerland
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes

Inclusion criteria

* Having an exam at the end of the semester, that is still at least four weeks ahead * Self-reported fear of the exam (i.e., not clinical) * Healthy by self-report statement (i.e., no known current or chronic somatic diseases or psychiatric disorders) * Willing to participate in study

Exclusion criteria

* Any acute or chronic disease (chronic pain, hypertension, heart disease, renal disease, liver disease, diabetes) * Current medications (psychoactive medication, narcotics, intake of analgesics) * Any psychiatric disorders or being currently in psychological or psychiatric treatment * Insufficient German language skills to understand the instructions * Daily consumption of more than three alcoholic standard beverages (a standard alcoholic beverage is defined as either 3dl beer or 1 dl wine or 2cl spirits) * Current or regular drug consumption * Being a master student in Psychology * Allergy of one of the ingredients of the placebo pills (P-Dragees blue Lichtenstein) * Problems to swallow pills

Design outcomes

Primary

MeasureTime frameDescription
Change in Prüfungsangstfragebogen (PAF) questionnairefrom seven to three weeks before the exam (t0; baseline assessment), after study visit (t1) once a week for the following two weeks (t2-t3; midpoint assessments), baseline (t0 = 4 weeks to exam)) to posttreatment (t4 = 2to 0 days to exam )The PAF questionnaire consisting of 20 items with four subscales (worry, emotionality, interference, lack of confidence) is a multi-faceted measure of test anxiety. Each subscale consists of five items with a total of 20 questions overall. Response on a 4-point Likert-scale ranging from 1 (almost never) to 4 (almost always).

Secondary

MeasureTime frameDescription
Change in the Pittsburgh Sleep Quality Index (PSQI)from seven to three weeks before the exam (t0; baseline assessment), after study visit (t1) once a week for the following two weeks (t2-t3; midpoint assessments), baseline (t0 = 4 weeks to exam)) to posttreatment (t4 = 2to 0 days to exam )The PSQI is an 18 item self-rating questionnaire forming 7 subscales and includes frequency of sleep disturbing events, the assessment of sleep quality, the usual sleep times, sleep latency and sleep duration, the intake of sleep medications, as well as daytime fatigue.
Change in Change-sensitive symptom list (ASS-SYM symptom list)from seven to three weeks before the exam (t0; baseline assessment), after study visit (t1) once a week for the following two weeks (t2-t3; midpoint assessments), baseline (t0 = 4 weeks to exam)) to posttreatment (t4 = 2to 0 days to exam )ASS-SYM symptom list It is composed of 48 items arranged in 6 subscales: physical and psychological exhaustion, nervousness and mental tension, psycho-physiological dysregulation, performance and behavioral problems, burden of pain as well as self-determination and self-control problems.
test performanceassessed two months after the examtest performance (i.e., grade of the respective exam or pass/fail) of each participant
semi-structured qualitative interview with open-ended questions30-60 min duration after personal study conclusion (1 to 5 weeks after exam)qualitative interview to assess the subjective experiences, opinions and perceptions of (1) receiving the imaginary pill (N=10) and open label placebo (N=10) treatment, (2) their experiences during the three week intervention phase, (3) the exam situation (4) and thoughts about the use in the future. Participants of the no treatment group are not included. The data will be analyzed using a qualitative content analysis after Mayring (Mayring, 2014)

Countries

Switzerland

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026