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Add a Legume to Your Cart

9 de junho de 2026 atualizado por: University of Milano Bicocca

Add a Legume to Your Cart: The Role of Tailored Communication in Promoting Healthier and More Sustainable Food Purchasing - A Study Within the Framework of the PNRR 10 ON FOODS Partnership

This study aims to evaluate the efficacy of a healthy diet promotion intervention focused on increasing legume consumption. The intervention is delivered via mobile application in a sample drawn from the healthy adult population.

Visão geral do estudo

Status

Concluído

Condições

Intervenção / Tratamento

Descrição detalhada

This study investigates the effects of different communication strategies on behavioral change. The intervention is designed to promote legume consumption. After compiling different profiling and assessment questionnaires, participants watch one of three different possible type of brief video performed by professional actors that discuss the benefits of eating more legumes in terms of health and environmental benefits. Then, with an ad-hoc designed task, they do a simulated grocery shopping and an automatic task to assess approach-avoidance tendency towards meat vs. legumes dishes. Finally, explicit attitudes are assessed.

Group differences are explored across three experimental conditions, which vary in the communication strategies. Group 1 watches a video with an educational communicative style and content (EDUCATIONAL), group watches a video presented with a persuasive style, and general content (PERSUASIVE), while group 3 watches a persuasive video with tailored content, based on the profiling phase (TAILORED).

The primary aim of the study is to evaluate the impact of these different communication strategies on attitudes and legume purchase. Secondary aims include the investigation of differences in other unspecific purchases.

Tipo de estudo

Intervencional

Inscrição (Real)

682

Estágio

  • Não aplicável

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Locais de estudo

      • Milan, Itália, 20126
        • Piazza dell'Ateneo Nuovo 1

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

  • Adulto

Aceita Voluntários Saudáveis

Sim

Descrição

Inclusion Criteria:

  • be university students (enrolled in a bachelor's degree, master's degree/specialized degree/single-cycle degree program, or postgraduate education);
  • own a smartphone.

Exclusion Criteria:

  • consume an adequate amount of legumes (> 3 servings);
  • suffer from one or more conditions that could represent a contraindication to the consumption of certain specific categories of legumes, such as favism, allergies, irritable bowel syndrome, short bowel syndrome and/or leaky gut, forms of intestinal dysbiosis, or other intestinal disorders.

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Prevenção
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição Paralela
  • Mascaramento: Dobro

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Educational
Participants watch a video with an educational content and communicative style about the benefits of eating legumes
Participants watch an educational video about the benefits of eating legumes. Then, they perform the grocery shopping simulation and the automatic task for approach/avoidance assessment
Experimental: Persuasive
Participants watch a video with an educational content and a persuasive communicative style about the benefits of eating legumes
Participants watch a persuasive video with educational content about the benefits of eating legumes. Then, they perform the grocery shopping simulation
Experimental: Tailored
Participants watch a video with a persuasive communicative style and tailored content about the benefits of eating legumes
Participants watch a persuasive video with a tailored content about the benefits of eating legumes. Then, they perform the grocery shopping simulation

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Portions of purchased legumes - task 1 - simulation on online grocery shopping
Prazo: T1 - day 3. After compiling the baseline assessment (T0) at day 1, participants received the link to complete the second part of the survey at day 3, which was to be completed by the end of the day.

In the first task, specifically designed for the present study, participants are asked to complete a simulated online grocery shopping for the following week. The task is structured to closely resemble a real shopping experience: each item can be added to the virtual cart in a potentially unlimited number of units, with higher values indicating larger quantities purchased and a value of zero indicating that the item was not selected.

The primary outcome will consist of the total number of legume-based items selected, subsequently converted into servings. This conversion process will be carried out by the nutrition research team.

T1 - day 3. After compiling the baseline assessment (T0) at day 1, participants received the link to complete the second part of the survey at day 3, which was to be completed by the end of the day.
Explicit attitudes about legumes
Prazo: T1 - day 3. After compiling the baseline assessment (T0) at day 1, participants received the link to complete the second part of the survey at day 3, which was to be completed by day 3.

Participants were asked to express their opinions about legumes using six different bipolar scales, introduced with the following instruction:

"Now think about legumes (e.g., chickpeas, peas, beans, lentils, broad beans). Which adjectives do you consider most appropriate to describe them? Please respond to each pair of adjectives without overthinking your answer."

The bipolar adjective pairs were as follows: negative-positive; bland-tasty; isolating-convivial; unsatisfying-satiating; difficult-easy; loser-winner.

Responses were recorded on 7-point scales ranging from 1 (indicating the negative pole of each adjective pair) to 7 (indicating the positive pole of each adjective pair).

T1 - day 3. After compiling the baseline assessment (T0) at day 1, participants received the link to complete the second part of the survey at day 3, which was to be completed by day 3.
Swipe Approach-Avoidance Task (SwipeAAT)
Prazo: T1 - day 3. After compiling the baseline assessment (T0) at day 1, participants received the link to complete the second part of the survey at day 3, which was to be completed by day 3.

The Swipe Approach-Avoidance Task (SwipeAAT) is a smartphone-based version of the Approach-Avoidance Task, in which participants interact with visual stimuli according to specific instructions. Stimuli must either be "approached" (by swiping upward) or "avoided" (by swiping downward) depending on the instructions provided. Reaction times recorded during task performance are analyzed to infer spontaneous behavioral tendencies of approach or avoidance toward the presented stimuli.

To assess spontaneous approach and avoidance tendencies toward legumes and meat, two scores were computed for each participant:

Legume SwipeAAT score, calculated as the difference between the mean of all valid latencies (see Data Exclusion) for the "Avoid legumes" trials and the "Approach legumes" trials.

Meat SwipeAAT score, calculated as the difference between the mean of all valid latencies (see Data Exclusion) for the "Avoid meat" trials and the "Approach meat" trials.

T1 - day 3. After compiling the baseline assessment (T0) at day 1, participants received the link to complete the second part of the survey at day 3, which was to be completed by day 3.
Intention to increase legumes portions in the future - single ad hoc item
Prazo: T1 - day 3. After compiling the baseline assessment (T0) at day 1, participants received the link to complete the second part of the survey at day 3, which was to be completed by day 3.
Participants were asked to report their future intention to increase their weekly consumption of legumes using a single-item measure ("Do you intend to increase your consumption of legumes in the near future?"). Responses were provided on a 5-point scale ranging from 1 ("absolutely not") to 5 ("absolutely yes").
T1 - day 3. After compiling the baseline assessment (T0) at day 1, participants received the link to complete the second part of the survey at day 3, which was to be completed by day 3.

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Portions of other purchased items - task 1 - simulation on online grocery shopping
Prazo: T1 - day 3. After compiling the baseline assessment (T0) at day 1, participants received the link to complete the second part of the survey at day 3, which was to be completed by day 3.
In addition to legumes, purchases made during the online grocery shopping simulation task will also be analyzed for other categories of interest, including meat, fruit and vegetables, processed foods, and related product categories.
T1 - day 3. After compiling the baseline assessment (T0) at day 1, participants received the link to complete the second part of the survey at day 3, which was to be completed by day 3.

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

Investigadores

  • Diretor de estudo: Patrizia Steca, University of Milan-Bicocca
  • Investigador principal: Maria Elide Vanutelli, University of Milan-Bicocca

Publicações e links úteis

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Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Real)

17 de novembro de 2025

Conclusão Primária (Real)

13 de março de 2026

Conclusão do estudo (Real)

13 de março de 2026

Datas de inscrição no estudo

Enviado pela primeira vez

6 de maio de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

13 de maio de 2026

Primeira postagem (Real)

20 de maio de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

11 de junho de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

9 de junho de 2026

Última verificação

1 de maio de 2026

Mais Informações

Termos relacionados a este estudo

Outros números de identificação do estudo

  • RM-2025-1014
  • PE00000003;CUP D93C22000890001 (Número de outro subsídio/financiamento: Italian Ministry of University and Research funded by the European Union - NextGenerationEU)

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

NÃO

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

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