Comparing Designs for Restaurant "Eco-Labels"

NCT ID: NCT05953246

Last Updated: 2023-08-16

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

2207 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-08-07

Study Completion Date

2023-08-07

Brief Summary

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The aim of this study is to compare responses to 5 different types of labels for restaurant menus: 1) Control (non-sustainability-label: neutral labels not referencing environmental sustainability); 2) Numeric text-only sustainability label; 3) Endorsement text-only sustainability label; 4) Endorsement icon-only sustainability label; 5) Endorsement text-plus-icon sustainability label. Participants will be randomized to 1 of the 5 labeling arms above. Each participant will view 3 labels (shown in random order) from their randomly assigned labeling arm and respond to survey questions about each label (e.g., attention, perceived effectiveness).

Detailed Description

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This is an online randomized controlled trial. Investigators will recruit participants through a survey company to complete an online survey. In the study, participants will be randomized to 1 of 5 labeling arms: 1) Control (non-sustainability-label: neutral labels not referencing environmental sustainability); 2) Numeric text-only sustainability label; 3) Endorsement text-only sustainability label; 4) Endorsement icon-only sustainability label; 5) Endorsement text-plus-icon sustainability label. Participants will be randomized to 1 of the 5 labeling arms above. Each participant will view 3 labels (shown in random order) from their randomly assigned labeling arm and respond to survey questions about each label (e.g., attention, perceived effectiveness).

Conditions

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Food Preferences

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Study Groups

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Neutral labels

Labels shown will be QR codes with and without neutral text (i.e., not mentioning environmental impacts)

Group Type ACTIVE_COMPARATOR

Neutral labels

Intervention Type BEHAVIORAL

Participants view neutral labels (QR codes with and without neutral text) for menu items

Numeric text-only sustainability labels

Labels shown will contain numeric text depicting the greenhouse gas emissions associated with production of the menu item

Group Type EXPERIMENTAL

Numeric text-only sustainability labels

Intervention Type BEHAVIORAL

Participants view labels with numeric text depicting the greenhouse gas emissions associated with production of the menu item

Endorsement text-only sustainability labels

Labels shown will contain text endorsing menu items as having low environmental impact

Group Type EXPERIMENTAL

Endorsement text-only sustainability labels

Intervention Type BEHAVIORAL

Participants view labels using text to endorse menu items as having low environmental impact

Endorsement icon-only sustainability labels

Labels shown will contain icons endorsing menu items as having low environmental impact

Group Type EXPERIMENTAL

Endorsement icon-only sustainability labels

Intervention Type BEHAVIORAL

Participants view labels using icons to endorse menu items as having low environmental impact

Endorsement text-plus-icon sustainability labels

Labels shown will contain both text and icons endorsing menu items as having low environmental impact

Group Type EXPERIMENTAL

Endorsement text-plus-icon sustainability labels

Intervention Type BEHAVIORAL

Participants view labels using text and icons to endorse menu items as having low environmental impact

Interventions

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Neutral labels

Participants view neutral labels (QR codes with and without neutral text) for menu items

Intervention Type BEHAVIORAL

Numeric text-only sustainability labels

Participants view labels with numeric text depicting the greenhouse gas emissions associated with production of the menu item

Intervention Type BEHAVIORAL

Endorsement text-only sustainability labels

Participants view labels using text to endorse menu items as having low environmental impact

Intervention Type BEHAVIORAL

Endorsement icon-only sustainability labels

Participants view labels using icons to endorse menu items as having low environmental impact

Intervention Type BEHAVIORAL

Endorsement text-plus-icon sustainability labels

Participants view labels using text and icons to endorse menu items as having low environmental impact

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Participants will be US adults
* Ages 18 or older
* With an over-sample of adults (50% of total sample) 18-29 years

Exclusion Criteria

* Younger than 18
* Non-US
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Harvard Pilgrim Health Care

OTHER

Sponsor Role collaborator

Stanford University

OTHER

Sponsor Role lead

Responsible Party

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Anna Grummon

Assistant Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Anna H Grummon, PhD

Role: PRINCIPAL_INVESTIGATOR

Assistant Professor

Locations

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Stanford School of Medicine

Palo Alto, California, United States

Site Status

Countries

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United States

Other Identifiers

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69580b

Identifier Type: -

Identifier Source: org_study_id

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