Skip to main content

Table 2 Questionnaire itemsa per secondary outcome including item references

From: Reducing cardiometabolic risk in adults with a low socioeconomic position: protocol of the Supreme Nudge parallel cluster-randomised controlled supermarket trial

Subject Item Reference
FOOD DECISION STYLES
Reflective I compare different types of fruit and vegetables before I buy something [81]
I put fruit and vegetables on my shopping list in advance  
I think carefully about what fruits and vegetables I will buy  
I make a thoughtful choice for the fruit and vegetables that I buy  
I choose my vegetables and fruit attentively  
Habitual Buying fruit and vegetables is part of my routine [82, 83]
I always buy the same fruit and vegetables  
I buy fruit and vegetables on autopilot mode  
Buying fruit and vegetables is typically something for me  
Buying fruit and vegetables is something I do by default  
Impulsive I buy fruit and vegetables if I feel like it [81, 84, 85]
I buy fruit and vegetables spontaneously
I buy fruit and vegetables on a whim  
I buy fruit and vegetables if it comes to mind  
I buy fruit and vegetables when I see a special offer  
NUDGES AND SOCIAL COGNITIVE FACTORS
Health goals I think it’s important to eat healthy [86, 87]
Healthy shopping Healthy products are available in my supermarket [88, 89]
In my supermarket it is easy to do healthy shopping  
Perceived social norm Others in my supermarket buy healthy products [90]
My friends and family eat healthy  
Attractiveness healthy foods Healthy products are tasty [91]
WALKING BEHAVIOURS AND SOCIAL COGNITIVE FACTORS
Self-monitoring In the last four weeks I have kept in my mind whether I have … [92]
… walked long enough  
… walked often enough  
… took sufficient steps by going walking  
Planning In the last four weeks I knew before I went walking … [93]
… where I went for a walk,  
… why I went for a walk  
… when I went for a walk  
… how long I went for a walk  
… who I went for a walk with  
Social comparison When thinking about people who are similar to you, do you think you walk less or more per day than those people? (much less than others-much more than others) [94]
How often do you compare your own walking behaviour with that of people who are similar to you (always – never)  
Self-efficacy How certain are you at the moment that you could meet your daily walking goal even if … (not sure at all-very sure) [95, 96]
… I am tired  
… I have a bad mood  
… I have very little time available  
…I am on vacation  
… it is raining outside  
Intention I intend to meet my daily walking goal every day of the week (yes, definitely – no, definitely not)  
I am sure I will meet my daily walking goal every day of the week (yes, definitely – no, definitely not)  
I plan to meet my daily walking goal every day of the week (yes, definitely – no, definitely not)  
CUSTOMER SATISFACTION
  How satisfied are you with your Coop supermarket in general (very unsatisfied-very satisfied)  
  To what extent are you satisfied with... (very unsatisfied-very satisfied)  
  …the supermarket environment and atmosphere?  
  …the supermarket layout and routing?  
  ...the supermarket tidiness?  
  …the assortment of food products?  
  …the general product prices?  
  ...the product discount prices?  
  …the fruit and vegetable prices?  
  …the bread prices?  
TECHNOLOGY ACCEPTANCE
Communication The coaching app… [97]
...invites me for a conversation  
...is open to a conversation with me  
…uses conversation style communication with me  
…tries to communicate with me in a human voice  
…tries to make communication interesting for me  
…tries to make communication with me fun  
…would admit an error to me  
…treats me as a human being  
How the user interface of the coaching app works is...  
…easy for me to learn  
…clear for me to understand  
…easy for me to understand  
Technology as aid to enhance physical activity The step counter app is... [98]
…useful for me to keep track of my progress towards my daily walking goal  
…valuable for me to keep track of my progress towards my daily walking goal  
…good for me to keep progressing towards my daily walking goal  
…helpful for me to meet my daily walking goal  
ACCEPTANCE OF NUDGES
Nudge awareness Have you noticed anything in the supermarket in the past 12 months? (yes/no) [99]
If so, what have you noticed? (free text)  
Appreciation It is nice when the supermarket suggests choices to me  
  1. aParticipants are asked to rate the items on seven-point Likert Scales (strongly disagree-strongly agree), unless indicated otherwise