Sustainable Food ConsumptionNCT04935203
Consumers' Emotional Reaction to Sustainability Cue
A study testing Priming intervention in people with Sustainable Food Consumption, run by The University of Hong Kong at 1 site in Hong Kong.
Trial summary
This will be a randomized control trial (RCT) to examine whether the three priming interventions (health priming, environmental sustainability priming, and co-benefits priming) work to change consumers' sustainable food choice through their effects on changing consumers' emotional reaction when seeing foods with cues… Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Sustainable Food Consumption
- What is being tested?
- Priming intervention
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 200 participants
- Where
- 1 siteHong Kong
- Study dates
- 12 May 2023to 28 Sep 2023
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Subjects should be aged 18 years or above
- Subjects should be Hong Kong residents
- Subjects should be able to read Chinese
Who cannot join
- Subjects who have vegan or vegetarian diets will be excluded
- Subjects who have to follow special diets due to illnesses will be excluded
- Subjects domestic helpers will also be excluded
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Can we Prime Sustainable Food Choice? A Mix-methods Study
This will be a randomized control trial (RCT) to examine whether the three priming interventions (health priming, environmental sustainability priming, and co-benefits priming) work to change consumers' sustainable food choice through their effects on changing consumers' emotional reaction when seeing foods with cues of environmental sustainability, which will be indicated by measuring consumers' facial expression, eye movement and pupil dilation.
- Conditions
- Sustainable Food Consumption
- Being tested
- Priming intervention
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Priming interventionBehavioural
The priming manipulation will be embedded in one computerized experiment to test the effect of three priming interventions on people's emotional reaction and their subsequent sustainable food selection. The priming conditions include priming with health benefits, environment benefits, and co-benefits of having sustainable diets, respectively. The cueing manipulation will be achieved by asking participants to complete a word-search exercise. Brief introduction will be provided to guide participants to choose words/statements that can indicate having a health and sustainable diet can have one of the three benefits: health benefits, environmental benefits or both benefits. The exercise will take ~2 min.
| Study group | Role | What they receive |
|---|---|---|
| Control message group | No intervention | Participants will not receive the priming manipulation. |
| Health benefits priming group | Experimental | Participants will be cueing with health benefits by asking to do a word-search exercise beginning with: "In the following, please choose words/statements that can indicate that having a healthy and sustainable diet can have health benefits, such as..." Receives: Behavioral: Priming intervention |
| Environmental benefits priming group | Experimental | Participants will be cueing with environmental benefits by asking to do a word-search exercise beginning with: "In the following, please choose words/statements that can indicate that having a healthy and sustainable diet can have environmental benefits, such as..." Receives: Behavioral: Priming intervention |
| Environmental and health co-benefits priming group | Experimental | Participants will be cueing with environmental and health co-benefits by asking to do a word-search exercise beginning with: "In the following, please choose words/statements that can indicate that having a healthy and sustainable diet can have both benefits for health and the environment, such as..." Receives: Behavioral: Priming intervention |
What is being measured
The primary outcome is the main question the study is designed to answer.
Participants' choice of sustainable foods
Measure name: Participants' food choice for sustainable food
Measure tool: E-prime
Measure process: During the computerized task, participants will examine a series of food products. Subsequently participants will be directed to simulated webpage for online shopping with all the foods they have examined available and they are required to buy three products they like most with the available budget provided.
Measure units: Participants' actual food choice, whether they prefer choosing more sustainable food.
Measured: Immediately after they are exposed to priming manipulation
Participants' facial expression
Measure name: Participants' facial expression measured by pupil diameters
Measure tool: E-prime with Tobii Pro eye trackers
Measure units: Pupil diameters will be used to compare difference when participants view the less or more sustainable foods. The larger pupillary variations is an indicator of interest in the products.
Measured: Immediately after they are exposed to priming manipulation
Participants' eye movement data
Measure name: Participants' eye movement data
Measure tool: E-prime with Tobii Pro eye trackers
Measure units: Count frequency of looking at the environmentally friendly logo for each food category. Greater number indicates greater degree of attention and interest.
Measured: Immediately after they are exposed to priming manipulation
Secondary outcomes (2)
Social orientation value
Measure name: Social Orientation Value (SVO)
Measure tool: survey questionnaire
Measure units: Participants will be classified as prosocial, individualistic, or competitive if they made at least six or more choices consistent with one of the orientations.
Measured: Immediately after they complete the computerized task with priming manipulation
Pro-environmental values
Measure name: New Environmental Paradigm (a reduced 6-items version)
Measure tool: Survey questionnaire
Measure unit: All the responses will be measured on a 5-point agreement scale. Greater aggregated score indicates greater environmental concern.
Measured: Immediately after they complete the computerized task with priming manipulation
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted22 Jun 2021
- Study start12 May 2023
- Primary completion28 Sep 2023
- Study completion28 Sep 2023
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Sustainable Food ConsumptionStudies of the same condition, open and under way.
- More trials run by The University of Hong KongThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Outcomes assessor
- Enrolment
- 200 participants (actual)
Sponsor and investigators
- Lead sponsor
- The University of Hong Kong
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Qiuyan Liao, The University of Hong Kong
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04935203
- Sponsor's protocol ID
- 201901231sv_b
- Status last verified
- Jan 2024
- First submitted
- 7 Jun 2021
- Last updated
- 3 Jan 2024
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided: Data will be shared upon reasonable request from PI.
Study at a glance
From the registry record, last updated by the sponsor on 3 Jan 2024. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Can we Prime Sustainable Food Choice? A Mix-methods Study
- ClinicalTrials.gov ID
- NCT04935203
- Acronym / sponsor ID
- 201901231sv_b
- Conditions
- Sustainable Food Consumption
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 200 participants (actual)
- Lead sponsor
- The University of Hong KongUniversity, hospital or other
- Study start
- 12 May 2023 (actual)
- Primary completion
- 28 Sep 2023 (actual)
- Study completion
- 28 Sep 2023 (actual)
- First posted
- 22 Jun 2021 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This will be a randomized control trial (RCT) to examine whether the three priming interventions (health priming, environmental sustainability priming, and co-benefits priming) work to change consumers' sustainable food choice through their effects on changing consumers' emotional reaction when seeing foods with cues of environmental sustainability, which will be indicated by measuring consumers' facial expression, eye movement and pupil dilation.
Study design
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (outcomes assessor)
- Number of arms
- 4
| Arm | Type | Receives |
|---|---|---|
| Control message group | No intervention | –Participants will not receive the priming manipulation. |
| Health benefits priming group | Experimental | Behavioral: Priming interventionParticipants will be cueing with health benefits by asking to do a word-search exercise beginning with: "In the following, please choose words/statements that can indicate that having a healthy and sustainable diet can have health benefits, such as..." |
| Environmental benefits priming group | Experimental | Behavioral: Priming interventionParticipants will be cueing with environmental benefits by asking to do a word-search exercise beginning with: "In the following, please choose words/statements that can indicate that having a healthy and sustainable diet can have environmental benefits, such as..." |
| Environmental and health co-benefits priming group | Experimental | Behavioral: Priming interventionParticipants will be cueing with environmental and health co-benefits by asking to do a word-search exercise beginning with: "In the following, please choose words/statements that can indicate that having a healthy and sustainable diet can have both benefits for health and the environment, such as..." |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- Subjects should be aged 18 years or above
- Subjects should be Hong Kong residents
- Subjects should be able to read Chinese
Key exclusion criteria (3 listed)
- Subjects who have vegan or vegetarian diets will be excluded
- Subjects who have to follow special diets due to illnesses will be excluded
- Subjects domestic helpers will also be excluded
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Priming interventionThe priming manipulation will be embedded in one computerized experiment to test the effect of three priming interventions on people's emotional reaction and their subsequent sustainable food selection. The priming conditions include priming with health benefits, environment benefits, and co-benefits of having sustainable diets, respectively. The cueing manipulation will be achieved by asking participants to complete a word-search exercise. Brief introduction will be provided to guide participants to choose words/statements that can indicate having a health and sustainable diet can have one of the three benefits: health benefits, environmental benefits or both benefits. The exercise will take ~2 min. | Behavioural | Environmental and health co-benefits priming group, Environmental benefits priming group, Health benefits priming group |
Primary outcome
Participants' choice of sustainable foods
Time frame: Immediately after they are exposed to priming manipulation
Measure name: Participants' food choice for sustainable food Measure tool: E-prime Measure process: During the computerized task, participants will examine a series of food products. Subsequently participants will be directed to simulated webpage for online shopping with all the foods they have examined available and they are required to buy three products they like most with the available budget provided. Measure units: Participants' actual food choice, whether they prefer choosing more sustainable food.
Participants' facial expression
Time frame: Immediately after they are exposed to priming manipulation
Measure name: Participants' facial expression measured by pupil diameters Measure tool: E-prime with Tobii Pro eye trackers Measure units: Pupil diameters will be used to compare difference when participants view the less or more sustainable foods. The larger pupillary variations is an indicator of interest in the products.
Participants' eye movement data
Time frame: Immediately after they are exposed to priming manipulation
Measure name: Participants' eye movement data Measure tool: E-prime with Tobii Pro eye trackers Measure units: Count frequency of looking at the environmentally friendly logo for each food category. Greater number indicates greater degree of attention and interest.
2 secondary outcomes
Social orientation value
Time frame: Immediately after they complete the computerized task with priming manipulation
Pro-environmental values
Time frame: Immediately after they complete the computerized task with priming manipulation
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Jan 2024.
- Individual participant dataSharing planned: Undecided. Data will be shared upon reasonable request from PI.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Priming intervention in people with Sustainable Food Consumption, run by The University of Hong Kong at 1 site in Hong Kong.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 3 Jan 2024. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Hong Kong. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Participants' choice of sustainable foods (time frame: Immediately after they are exposed to priming manipulation). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Jan 2024.