An interventional study of Structured Cognitive Games Program in Attention - no Condition is Being Assessed - Healthy Adults, sponsored by Ministry of National Education, Turkey. Completed at 1 site in Turkey (Türkiye). Open to participants aged 12 Years to 14 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-11-09.
Sponsored by Ministry of National Education, Turkey · Not applicable, Interventional, and Other
Structured cognitive games are becoming increasingly prevalent in middle school curricula. However, their effects on selective attention performance among students transitioning into adolescence have been examined in only a limited number of studies. This study investigates the effects of a 12-week structured cognitive games program on selective attention performance among 8th-grade Turkish students aged 12-14 years. A pretest-posttest control-group quasi-experimental design with classroom-level assignment was employed. Fifty-five students from two pre-existing, academically comparable classrooms participated in the study. The experimental group received a structured program consisting of Mangala, Reversi, Surakarta, and Dümen (structured cognitive games) for 12 weeks, conducted across two separate days as two 40-minute sessions per week, while the control group continued with the standard curriculum. Attention skills were assessed pre- and post-intervention using the paper-and-pencil version of the d2 Test of Attention to evaluate the cognitive impact of the program.
Ministry of National Education, Turkey is the lead sponsor of 2 studies on the registry; none are open to participants now.
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Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
This group received a structured cognitive games program consisting of Mangala, Reversi, Surakarta, and Dümen for 12 weeks, conducted as two 40-minute sessions per week (total 80 min/week).
Behavioral: Structured Cognitive Games Program
This group continued with the standard middle school curriculum without receiving the structured cognitive games intervention.
A 12-week structured cognitive games program consisting of Mangala, Reversi, Surakarta, and Dümen. It was conducted across two separate days as two 40-minute sessions per week (total 80 min/week) in the experimental group, while the control group continued with the standard curriculum.
d2 Test of Attention - Concentration Performance (CP)
Concentration Performance (CP) is calculated as the number of correctly crossed-out target items minus the number of commission errors (E2). It reflects the participant's selective attention and concentration capacity. Higher scores indicate superior attention performance.
Time frame: Baseline and post-intervention at week 12
d2 Test of Attention - Total Number of Items (TN)
The Total Number of Items (TN) score represents the total number of characters processed, serving as a quantitative measure of visual scanning speed, workload capacity, and raw processing speed.
Time frame: Baseline and post-intervention at week 12
d2 Test of Attention - Total Number of Items Minus Errors (TN-E)
The TN-E score is calculated as the total number of items processed minus the sum of errors. It represents a comprehensive baseline and post-intervention metric for overall attention performance.
Time frame: Baseline and post-intervention at week 12
d2 Test of Attention - Fluctuation Rate (FR)
The Fluctuation Rate (FR) score is calculated as the difference between the maximum and minimum number of items processed per line. It provides a measure of attentional stability, consistency, and pacing throughout the test.
Time frame: Baseline and post-intervention at week 12
d2 Test of Attention - Error Percentage (TN-E%)
The Error Percentage (TN-E%) provides a measure of accuracy, carefulness, and qualitative control during the attention task.
Time frame: Baseline and post-intervention at week 12
Plan to share: No
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From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is completed, as verified in Nov 2026. You cannot join it, but the record below documents what was studied.
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Ministry of National Education, Turkey