Protocol summary

Study aim
The effectiveness of treatment based on acceptance and commitment on self-criticism, internalized shame and repetitive negative thoughts in adolescents with anxiety
Design
A controlled clinical trial with parallel groups, without blinding, randomized, on 30 patients. The rand function of Excel software will be used for randomization.
Settings and conduct
The statistical population of the study will include all adolescents with anxiety between the ages of 13 and 17 who refer to the Ahvaz City Counseling Center during the specified time period. In the sample selection stage, convenience sampling method will be used. After selecting the samples to a volume of 30 people based on the research entry and exit criteria, the participants will be randomly assigned to two groups: "Acceptance and Commitment Therapy" (intervention group) and "Waiting List" (control group).
Participants/Inclusion and exclusion criteria
Inclusion criteria: Adolescents aged 13 to 17 years, suffering from anxiety as diagnosed by a specialist psychologist or relevant questionnaires. Exclusion criteria: Unwillingness to participate in the research, participation in other psychotherapy sessions during the research.
Intervention groups
Intervention group: All individuals who will receive acceptance and commitment therapy. Control group: All individuals who will not receive any intervention.
Main outcome variables
Self-criticism, internalized shame, repetitive negative thoughts, anxiety

General information

Reason for update
Acronym
IRCT registration information
IRCT registration number: IRCT20260611069754N1
Registration date: 2026-06-18, 1405/03/28
Registration timing: prospective

Last update: 2026-06-18, 1405/03/28
Update count: 0
Registration date
2026-06-18, 1405/03/28
Registrant information
Name
Zahra Bagheri
Name of organization / entity
Country
Iran (Islamic Republic of)
Phone
+98 61 3551 9635
Email address
saeid.hoo200@gmail.com
Recruitment status
Recruitment complete
Funding source
Expected recruitment start date
2026-07-06, 1405/04/15
Expected recruitment end date
2026-07-21, 1405/04/30
Actual recruitment start date
empty
Actual recruitment end date
empty
Trial completion date
empty
Scientific title
The effectiveness of treatment based on acceptance and commitment on self-criticism, internalized shame and repetitive negative thoughts in adolescents with anxiety
Public title
Determining the effectiveness of an acceptance and commitment-based intervention on self-conscious emotions and rumination in anxious adolescents
Purpose
Education/Guidance
Inclusion/Exclusion criteria
Inclusion criteria:
Adolescents aged 13 to 17 years Suffering from anxiety as diagnosed by a specialist psychologist or relevant questionnaires
Exclusion criteria:
Unwillingness to participate in the research Participation in other psychotherapy sessions during the research
Age
From 13 years old to 17 years old
Gender
Both
Phase
N/A
Groups that have been masked
No information
Sample size
Target sample size: 30
Randomization (investigator's opinion)
Randomized
Randomization description
The statistical population of the study will include all adolescents with anxiety between the ages of 13 and 17 who refer to the Counseling Center during the specified time period. In the sample selection stage, convenience sampling method will be used. After selecting a sample size of 30 people based on the research entry and exit criteria, participants will be randomly assigned to two groups: "Acceptance and Commitment Therapy" (intervention group) and "Waiting List" (control group). Randomization will be performed using the random block method with variable sizes (4 and 6 people) by an independent statistician who is not involved in the implementation process. The random allocation list will be generated using the RAND function in Excel software and then placed in opaque, sealed, and numbered envelopes so that the researcher and participants are not aware of the allocation sequence (allocation concealment). The envelope will be opened and the allocation group will be informed only when each participant enters the study. To ensure the equality of baseline variables (such as anxiety level, age), their distribution in the two groups will be examined during the statistical analysis stage.
Blinding (investigator's opinion)
Not blinded
Blinding description
Placebo
Not used
Assignment
Parallel
Other design features

Secondary Ids

empty

Ethics committees

1

Ethics committee
Name of ethics committee
Ethics Committee of Islamic Azad University of Ahvaz Branch
Street address
Opposite Keshavarz Street, Farhang Shahr, Golestan Highway
City
Ahvaz
Province
Khouzestan
Postal code
6134937333
Approval date
2026-05-26, 1405/03/05
Ethics committee reference number
IR.IAU.AHVAZ.REC.1405.183

Health conditions studied

1

Description of health condition studied
Anxiety
ICD-10 code
F41.1
ICD-10 code description
Generalized anxiety disorder

Primary outcomes

1

Description
Self-Criticism
Timepoint
1. Pre-test (before the start of the intervention) 2. Post-test (immediately after the end of the intervention period) 3. One-month follow-up after the intervention
Method of measurement
The measurement method will be using the Thomson and Zuroff (2004) self-criticism levels scale.

2

Description
Anxiety
Timepoint
1. Pre-test (before the start of the intervention) 2. Post-test (immediately after the end of the intervention period) 3. One-month follow-up after the intervention
Method of measurement
The measurement method will be the Beck Anxiety Inventory (1988).

3

Description
Internalized Shame
Timepoint
1. Pre-test (before the start of the intervention) 2. Post-test (immediately after the end of the intervention period) 3. One-month follow-up after the intervention
Method of measurement
The measurement method will be using the Cooke (1988) Internal Shame Scale.

4

Description
Repetitive Negative Thoughts
Timepoint
1. Pre-test (before the start of the intervention) 2. Post-test (immediately after the end of the intervention period) 3. One-month follow-up after the intervention
Method of measurement
The measurement method will be by the McCoy et al. (2010) Repetitive Thoughts Questionnaire.

Secondary outcomes

empty

Intervention groups

1

Description
Intervention group: Acceptance and Commitment Therapy Intervention. Duration of each session: 90 minutes. Total number of sessions: 8 sessions. Sequence of sessions: Twice a week. Therapeutic tools used: This intervention focuses on increasing psychological flexibility to reduce self-criticism, internalized shame, and rumination. The main tools include: cognitive decompression exercises, therapeutic metaphors appropriate to the adolescent's age, mindfulness exercises, identification of personal values, and committed action exercises. Session content: First session: pre-test, introduction to acceptance and commitment therapy, and familiarization with the goals of the sessions. Second session: Identifying negative thoughts, self-criticism, and practicing distancing from thoughts. Third session: Teaching acceptance of unpleasant emotions such as anxiety and shame. Fourth session: Practicing mindfulness and being present in the moment to reduce rumination. Fifth session: Familiarization with the concept of "self as a platform" and reducing internalized shame. Sixth session: Identifying personal values ​​and their relationship to adolescent behaviors. Seventh session: Practicing committed action and performing behaviors consistent with values. Eighth session: Conclusion, reviewing skills, post-test, and planning for follow-up.
Category
Treatment - Other

2

Description
Control group: Control group: The control group will not receive any intervention during the research, but to prevent factors that threaten the internal validity of the research, such as compensatory competition from the control group or demoralization, they will receive the treatment intervention after data collection.
Category
Treatment - Other

Recruitment centers

1

Recruitment center
Name of recruitment center
Ryan Consulting Center
Full name of responsible person
Zahra Bagheri
Street address
Between East 4th and 5th Streets, Kianpars
City
Ahvaz
Province
Khouzestan
Postal code
6133921294
Phone
+98 61 3392 1294
Email
rayanpsyclinic@gmail.com

Sponsors / Funding sources

1

Sponsor
Name of organization / entity
Islamic Azad University
Full name of responsible person
Aslan Egdarnezhad
Street address
Opposite Keshavarz Street, Farhang Shahr, Golestan Highway
City
Ahvaz
Province
Khouzestan
Postal code
6134937333
Phone
+98 61 3334 8421
Email
a_eigder@ymail.com
Grant name
Grant code / Reference number
Is the source of funding the same sponsor organization/entity?
Yes
Title of funding source
Islamic Azad University
Proportion provided by this source
100
Public or private sector
Private
Domestic or foreign origin
Domestic
Category of foreign source of funding
empty
Country of origin
Type of organization providing the funding
Academic

Person responsible for general inquiries

Contact
Name of organization / entity
Islamic Azad University
Full name of responsible person
Zahra Bagheri
Position
Master's student
Latest degree
Bachelor
Other areas of specialty/work
Psychology
Street address
Unit 2, Bahareh Complex, No. 4, First Street of Western Ostadan, Phase 1 of Padad
City
Ahvaz
Province
Khouzestan
Postal code
6185697785
Phone
+98 61 3551 9635
Email
saeid.ho200@gmail.com

Person responsible for scientific inquiries

Contact
Name of organization / entity
Islamic Azad University
Full name of responsible person
Zahra Bagheri
Position
Master's student
Latest degree
Bachelor
Other areas of specialty/work
Psychology
Street address
Unit 2, Bahareh Complex, No. 4, First Street of Western Ostadan, Phase 1 of Padad
City
Ahvaz
Province
Khouzestan
Postal code
6185697785
Phone
+98 61 3551 9635
Email
saeid.ho200@gmail.com

Person responsible for updating data

Contact
Name of organization / entity
Islamic Azad University
Full name of responsible person
Zahra Bagheri
Position
Master's student
Latest degree
Bachelor
Other areas of specialty/work
Psychology
Street address
Unit 2, Bahareh Complex, No. 4, First Street of Western Ostadan, Phase 1 of Padad
City
Ahvaz
Province
Khouzestan
Postal code
6185697785
Phone
+98 61 3551 9635
Email
saeid.ho200@gmail.com

Sharing plan

Deidentified Individual Participant Data Set (IPD)
Undecided - It is not yet known if there will be a plan to make this available
Study Protocol
Undecided - It is not yet known if there will be a plan to make this available
Statistical Analysis Plan
Not applicable
Informed Consent Form
Undecided - It is not yet known if there will be a plan to make this available
Clinical Study Report
Undecided - It is not yet known if there will be a plan to make this available
Analytic Code
Not applicable
Data Dictionary
Not applicable
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