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.
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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
60
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.
Secondary School
Ankara, Turkey (Türkiye)
Child Nutrition Self-Efficacy Scale
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.
Time frame: Pre-intervention (week 1), post-intervention (week 6), follow-up time (at the end of month 1 and 3)
"Sustainable Eco-Friendly Nutrition Scale
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.
Time frame: Pre-intervention (week 1), post-intervention (week 6), follow-up time (at the end of month 1 and 3)
Nutrition Attitude Subscale
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.
Time frame: Pre-intervention (week 1), post-intervention (week 6), follow-up time (at the end of month 1 and 3)
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