UMIN-ICDS Clinical Trial
| Unique ID issued by UMIN | UMIN000062193 |
|---|---|
| Receipt number | R000071169 |
| Scientific Title | Effects of a web-based Personalized Normative Feedback system for junior and senior high school students and their parents, and a dialogue intervention based on the system, on problematic gaming use among junior and senior high school students: a randomized controlled trial |
| Date of disclosure of the study information | 2026/07/14 |
| Last modified on | 2026/07/09 23:54:52 |
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Basic information
Public title
Effects of a web-based personalized feedback system and dialogue-based support on problematic gaming use among adolescents
Acronym
A study to verify the effectiveness of web-pNF in improving problematic gaming
Scientific Title
Effects of a web-based Personalized Normative Feedback system for junior and senior high school students and their parents, and a dialogue intervention based on the system, on problematic gaming use among junior and senior high school students: a randomized controlled trial
Scientific Title:Acronym
Web-PNF-RCT
Region
| Japan |
Condition
Condition
Problematic gaming use among junior and senior high school students
Classification by specialty
| Pediatrics | Psychiatry | Child |
Classification by malignancy
Others
Genomic information
NO
Objectives
Narrative objectives1
To examine, among junior and senior high school students and their parents, the effects of a web-based Personalized Normative Feedback (PNF) system alone and combined with a dialogue intervention based on the system, compared with a control group.
Basic objectives2
Efficacy
Basic objectives -Others
Trial characteristics_1
Exploratory
Trial characteristics_2
Explanatory
Developmental phase
Not applicable
Assessment
Primary outcomes
Change in Internet Gaming Disorder Test (IGDT) score from baseline to the 3-month follow-up
Key secondary outcomes
Gaming use (frequency, duration, etc.), household rules regarding gaming, and in-game spending/loot-box use measured by the Risky Loot Box Index (RLBI)
Base
Study type
Interventional
Study design
Basic design
Parallel
Randomization
Randomized
Randomization unit
Individual
Blinding
Open -no one is blinded
Control
No treatment
Stratification
Dynamic allocation
Institution consideration
Blocking
Concealment
Intervention
No. of arms
3
Purpose of intervention
Educational,Counseling,Training
Type of intervention
| Behavior,custom | Other |
Interventions/Control_1
Control group: Participants complete the baseline survey and the 3-month follow-up survey.
Interventions/Control_2
PNF group: After the baseline survey, participants receive individualized normative feedback regarding their gaming use through the web-based Personalized Normative Feedback (PNF) system. A 3-month follow-up survey is conducted.
Interventions/Control_3
PNF plus dialogue intervention group: After the baseline survey, participants receive feedback through the web-based PNF system and a dialogue intervention based on the system at the university. A 3-month follow-up survey is conducted.
Interventions/Control_4
Interventions/Control_5
Interventions/Control_6
Interventions/Control_7
Interventions/Control_8
Interventions/Control_9
Interventions/Control_10
Eligibility
Age-lower limit
| 13 | years-old | <= |
Age-upper limit
| 18 | years-old | >= |
Gender
Male and Female
Key inclusion criteria
Parent-child dyads consisting of a junior or senior high school student and their guardian; the guardian provides informed consent and the student provides informed assent; participants are able to attend the explanation session, baseline survey, intervention if allocated, and the 3-month follow-up survey conducted at the university.
Key exclusion criteria
Participants will be excluded if they meet any of the following criteria:
Adolescents who do not provide assent or consent to participate in the study, or whose parents/guardians do not provide consent.
Adolescents or parents/guardians who have substantial difficulty understanding the study explanation, questionnaires, web-based Personalized Normative Feedback system, or dialog-based intervention.
Adolescents who are currently receiving ongoing treatment or professional support for gaming disorder, internet gaming disorder, or other mental health problems, and for whom participation in this study may interfere with such treatment or support.
Adolescents for whom participation in the study may cause substantial psychological burden, as judged by the adolescent, parent/guardian, or researcher.
Adolescents or parents/guardians who are unable to participate in the baseline assessment, intervention, or follow-up assessment.
Other individuals judged by the principal investigator or research staff to be inappropriate for participation in the study.
Target sample size
60
Research contact person
Name of lead principal investigator
| 1st name | Tomonari |
| Middle name | |
| Last name | Irie |
Organization
Hokousho University
Division name
School of Education and Culture
Zip code
069-8511
Address
23, Bunkyodai, Ebetsu, Hokkaido
TEL
011-386-8011
tirie@hokusho-u.ac.jp
Public contact
Name of contact person
| 1st name | Tomonari |
| Middle name | |
| Last name | Irie |
Organization
Hokousho University
Division name
School of Education and Culture
Zip code
069-8511
Address
23, Bunkyodai, Ebetsu, Hokkaido
TEL
011-386-8011
Homepage URL
tirie@hokusho-u.ac.jp
Sponsor or person
Institute
Hokusho University
Institute
Department
Personal name
Funding Source
Organization
MEXT (Japan)
Organization
Division
Category of Funding Organization
Japanese Governmental office
Nationality of Funding Organization
Japan
Other related organizations
Co-sponsor
University of Human Environments
Name of secondary funder(s)
CASIO SCIENCE PROMOTION FOUNDATION
IRB Contact (For public release)
Organization
Hokusho University
Address
23, Bunkyodai, Ebetsu, Hokkaido
Tel
011-386-8011
tirie@hokusho-u.ac.jp
Secondary IDs
Secondary IDs
NO
Study ID_1
Org. issuing International ID_1
Study ID_2
Org. issuing International ID_2
IND to MHLW
Institutions
Institutions
人間環境大学（愛媛県）
Other administrative information
Date of disclosure of the study information
| 2026 | Year | 07 | Month | 14 | Day |
Related information
URL releasing protocol
Publication of results
Unpublished
Result
URL related to results and publications
Number of participants that the trial has enrolled
Results
Results date posted
Results Delayed
Results Delay Reason
Date of the first journal publication of results
Baseline Characteristics
Participant flow
Adverse events
Outcome measures
Plan to share IPD
IPD sharing Plan description
Progress
Recruitment status
Preinitiation
Date of protocol fixation
| 2026 | Year | 07 | Month | 01 | Day |
Date of IRB
Anticipated trial start date
| 2026 | Year | 07 | Month | 30 | Day |
Last follow-up date
| 2026 | Year | 11 | Month | 30 | Day |
Date of closure to data entry
Date trial data considered complete
Date analysis concluded
Other
Other related information
Management information
Registered date
| 2026 | Year | 07 | Month | 09 | Day |
Last modified on
| 2026 | Year | 07 | Month | 09 | Day |
Link to view the page
Value
https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000071169
