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NCT Number: NCT07326787

Social Cognitive Theory-Based Educational Intervention Program on Sustainable Eco-Friendly Nutrition

This study is designed as a parallel-group randomized controlled trial to evaluate the effectiveness of a sustainable environmentally friendly nutrition educational intervention program developed based on the principles of Social Cognitive Theory. The intervention aims to improve sustainable environmentally friendly nutrition behaviors, nutritional attitudes, and nutrition self-efficacy among adolescents.

Eligible participants will be randomly assigned to either an intervention group or a control group using a computerized simple randomization procedure conducted by an independent researcher. Allocation concealment will be ensured through participant coding, and data analysis will be performed by an independent biostatistician blinded to group assignments.

The intervention group will participate in a structured six-week educational program, consisting of one session per week. Each session will last approximately 40 minutes and will focus on a specific module addressing the relationship between climate change, environmental sustainability, and nutrition. Program content is grounded in Social Cognitive Theory, emphasizing observational learning, self-regulation, outcome expectations, and self-efficacy enhancement. Educational methods will include interactive presentations, group discussions, games, and activity-based learning supported by visual and audio materials to promote engagement and long-term behavioral change.

To reinforce learning and facilitate behavior maintenance, supplementary reinforcement messages will be delivered throughout the intervention period. Communication with participants and their parents will be maintained via digital messaging platforms to support adherence and engagement.

The control group will continue their routine school curriculum without receiving any nutrition-related educational intervention during the study period.

Outcome data will be collected at four time points: baseline (pre-intervention), immediately after completion of the six-week program (post-intervention), and at one-month and three-month follow-up assessments. Data collection is expected to take approximately 25 minutes at each assessment point. The follow-up assessments are intended to evaluate the sustainability of behavior change over time.

The intervention will be implemented during the fall semester of the 2025-2026 academic year following the completion of ethical approval and institutional permissions.

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Key information

Conditions

Sustainable Eco-Friendly Nutrition Adolescent Nutrition Self Efficacy

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Secondary School

Ankara, Turkey (Türkiye)

About this study

This study is designed as a parallel-group randomized controlled trial to evaluate the effectiveness of a sustainable environmentally friendly nutrition educational intervention program developed based on the principles of Social Cognitive Theory. The intervention aims to improve sustainable environmentally friendly nutrition behaviors, nutritional attitudes, and nutrition self-efficacy among adolescents.

Eligible participants will be randomly assigned to either an intervention group or a control group using a computerized simple randomization procedure conducted by an independent researcher. Allocation concealment will be ensured through participant coding, and data analysis will be performed by an independent biostatistician blinded to group assignments.

The intervention group will participate in a structured six-week educational program, consisting of one session per week. Each session will last approximately 40 minutes and will focus on a specific module addressing the relationship between climate change, environmental sustainability, and nutrition. Program content is grounded in Social Cognitive Theory, emphasizing observational learning, self-regulation, outcome expectations, and self-efficacy enhancement. Educational methods will include interactive presentations, group discussions, games, and activity-based learning supported by visual and audio materials to promote engagement and long-term behavioral change.

To reinforce learning and facilitate behavior maintenance, supplementary reinforcement messages will be delivered throughout the intervention period. Communication with participants and their parents will be maintained via digital messaging platforms to support adherence and engagement.

The control group will continue their routine school curriculum without receiving any nutrition-related educational intervention during the study period.

Outcome data will be collected at four time points: baseline (pre-intervention), immediately after completion of the six-week program (post-intervention), and at one-month and three-month follow-up assessments. Data collection is expected to take approximately 25 minutes at each assessment point. The follow-up assessments are intended to evaluate the sustainability of behavior change over time.

The intervention will be implemented during the fall semester of the 2025-2026 academic year following the completion of ethical approval and institutional permissions.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Being a 6th or 7th grade student
  • Volunteering to participate in the study
  • Family approval for participation in the study

Exclusion criteria

  • Following a specific nutrition program
  • Having communication difficulties (hearing, seeing, or understanding)
  • Having plans to travel/move out of town during the work period
  • Having special needs

Treatment and study plan

Social Cognitive Theory-Based Educational Intervention Program

Other

In this study, a sustainable eco-friendly nutrition educational intervention program was developed based on social cognitive theory. The sustainable eco-friendly nutrition educational intervention program will last six weeks. Each session will consist of one session per week, covering one module. Each session is expected to last approximately 40 minutes. Each module will utilize presentations based on the content, followed by various activities and games to reinforce the topic and support lasting behavioral changes in students.

To reinforce the knowledge and practices adolescents have learned and implemented during the program, and to strengthen the impact of the intervention, the researcher will prepare 12 SMS (Short Message Service) messages using various sources and send them individually to adolescents/parents.

Primary outcomes

  1. Child Nutrition Self-Efficacy Scale

    Time frame: Pre-intervention (week 1), post-intervention (week 6), follow-up time (at the end of month 1 and 3)

    It was measured with the "Child Nutrition Self-Efficacy Scale", which is used to evaluate children's self-efficacy regarding nutrition. The scale consists of 15 items rated on a 3-point Likert scale. Total scores range from -15 to +15, with higher scores indicating greater nutrition self-efficacy and healthier food choices.

  2. "Sustainable Eco-Friendly Nutrition Scale

    Time frame: Pre-intervention (week 1), post-intervention (week 6), follow-up time (at the end of month 1 and 3)

    The "Sustainable Eco-Friendly Nutrition Scale," developed by the researcher, was used to assess participants' sustainable eco-friendly nutritional behaviors. Higher scores on the scale indicate increased sustainable eco-friendly nutritional behavior The scale consists of 19 items rated on a 5-point Likert scale. Total scores range from 19 to 95, with higher scores indicating higher levels of sustainable environmentally friendly nutrition behavior.

  3. Nutrition Attitude Subscale

    Time frame: Pre-intervention (week 1), post-intervention (week 6), follow-up time (at the end of month 1 and 3)

    It was measured with the "Nutrition Attitude Subscale" used to determine the participants' attitudes towards healthy nutrition. The nutrition subscale consists of 4 items rated on a 4-point Likert scale. Total scores range from 4 to 16, with higher scores indicating more positive nutrition attitudes.

Sponsors and collaborators

Lead sponsor

Gazi University

Other

Registry information

Official study title

The Effect of a Social Cognitive Theory-Based Educational Intervention Program on Sustainable Eco-Friendly Nutrition, Nutritional Attitudes, and Self-Efficacy in Adolescents: A Randomized Controlled Trial

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Jan 8, 2026
Registry last updated
Feb 10, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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