Ultraprocessed Foods in Colombia

Обзор

The study seeks to examine how characters on packaging and warning labels affect purchase intentions and risk perception among children aged 12 to 17 in Colombia and, examine whether characters' presence weakens or reduces the perceived message effectiveness of the warning labels' impact. This will be a 2x2 between-subjects experiment manipulating presence or absence of characters and presence or absence of warning labels. Participants will be randomly assigned to 1 of 4 conditions in an online survey programmed in Qualtrics.

Подробное описание

This study will employ a 2x2 between-subjects experimental design to investigate the independent and combined effects of characters and front-of-package warning labels on children's risk perceptions, purchase intentions and perceived message effectiveness regarding ultra-processed foods.

After parents or legal guardians provide informed consent and the children assent to participate, the survey platform (Qualtrics) will randomly assign each child to one of four experimental conditions:

1. Warning label + Character 2. Warning label only 3. Barcode control label + Character 4. Barcode control label only

Participants will complete the study online through a self-administered survey programmed in Qualtrics. This survey has a duration of approximately 15 minutes. Each child will be exposed to three fictional ultra-processed food products (cookies package, juice bottle, and chip bag), displayed in random order. The stimuli were developed to resemble common products in Colombia but without using real brands to avoid brand loyalty bias. Each product will be displayed with a label consistent with the child's assigned experimental condition.

Children will respond to a series of questions for each product individually. These questions will assess:

* Risk perception * Purchase intention * Perceived message effectiveness

Вмешательства

• Поведенческое Warning label
  Participants will view images of three products containing octagonal warning labels.
• Поведенческое Barcode control label
  Participants will view images of three products containing Barcode control label.
• Поведенческое Character
  Participants will view images of three products containing characters.
• Поведенческое Without character
  Participants will view images of three products without characters.

Первичные конечные точки

• Purchase intention [Срок оценки: During ~15 minute online survey]
• Risk perception [Срок оценки: During ~15 minute online survey]

Вторичные конечные точки (1)

• Perceived Message Effectiveness [Срок оценки: During ~15 minute online survey]

Критерии участия

Критерии включения

• Children and adolescents between 12 and 17 years old
• Colombian residents

Критерии исключения

• Children with legal blindness, partial blindness, or total blindness, since the study involves viewing images and reading questions.

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Да

Дизайн исследования

Распределение

Рандомизированное

Модель

Факторный дизайн

Маскирование

Открытое

Основная цель

Профилактика

Центры проведения

Колумбия · 1 центр

• Online panel — Bogotá

Идентификаторы

NCT: NCT07528443 · 24-2935

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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