Scale items, individual statements and sources
| Constructs/Indicators | Statements to evaluate indicators (5-point likert scale) | Sources |
|---|---|---|
| Health self-efficacy | Lee et al. (2008) | |
| HSE1 | I am confident I can have a positive effect on my health | |
| HSE2 | I have set some definite goals to improve my health | |
| HSE3 | I have been able to meet the goals I set for myself to improve my health | |
| HSE4 | I am actively working to improve my health | |
| HSE5 | I feel that I am in control of how and what I learn about my health | |
| Label use | Adapted from Rumm et al. (2015) | |
| LAB1 | I know the different nutrition labels on food products well | |
| LAB2 | I prefer products with nutrition labels to products without nutrition labels when food shopping | |
| LAB3 | When food shopping, I consciously pay attention to whether products contain a nutrition label or not | |
| Social environment | How often in the last 30 days has your family or friends done the following? | Norman et al. (2010) |
| SOCE1 | Encourage you to eat healthy foods | |
| SOCE2 | Discuss the benefits of eating healthy foods | |
| SOCE3 | Remind you to choose the healthy food option while food shopping | |
| SOCE4 | Share ideas on healthy eating | |
| SOCE5 | Eat healthy meals with you | |
| SOCE6 | Complain about unhealthy foods | |
| Outcome expectancies | Diehl (2002) | |
| OUTCE1 | Nutrition research helps us to live longer | |
| OUTCE2 | Only if I eat healthy, I am fit and fully efficient | |
| OUTCE3 | The right kind of diet is an important prerequisite for a healthy and long life | |
| OUTCE4 | True well-being can only be achieved by maintaining a healthy diet | |
| OUTCE5 | A healthy diet also makes me feel better mentally | |
| OUTCE6 | Many complaints of old age could be avoided if people ate healthier | |
| OUTCE7 | A sensible diet has a beneficial effect on every person's health | |
| OUTCE8 | It is certain that you live longer if you eat healthy | |
| Emotions | Based on Pfister and Böhm (2008) and Richins (1997) | |
| EMO1 (information function) | When I buy healthy food products, I feel content/discontent | |
| EMO2 (relevance function) | When I buy healthy food products, I feel fulfilled/unfulfilled | |
| EMO3 (commitment function) | When I buy healthy food products, I feel proud/guilty | |
| EMO4 (speed function) | When I buy healthy food products, I feel calm/overwhelmed |
| Constructs/Indicators | Statements to evaluate indicators (5-point likert scale) | Sources |
|---|---|---|
| Health self-efficacy | ||
| HSE1 | I am confident I can have a positive effect on my health | |
| HSE2 | I have set some definite goals to improve my health | |
| HSE3 | I have been able to meet the goals I set for myself to improve my health | |
| HSE4 | I am actively working to improve my health | |
| HSE5 | I feel that I am in control of how and what I learn about my health | |
| Label use | Adapted from | |
| LAB1 | I know the different nutrition labels on food products well | |
| LAB2 | I prefer products with nutrition labels to products without nutrition labels when food shopping | |
| LAB3 | When food shopping, I consciously pay attention to whether products contain a nutrition label or not | |
| Social environment | How often in the last 30 days has your family or friends done the following? | |
| SOCE1 | Encourage you to eat healthy foods | |
| SOCE2 | Discuss the benefits of eating healthy foods | |
| SOCE3 | Remind you to choose the healthy food option while food shopping | |
| SOCE4 | Share ideas on healthy eating | |
| SOCE5 | Eat healthy meals with you | |
| SOCE6 | Complain about unhealthy foods | |
| Outcome expectancies | ||
| OUTCE1 | Nutrition research helps us to live longer | |
| OUTCE2 | Only if I eat healthy, I am fit and fully efficient | |
| OUTCE3 | The right kind of diet is an important prerequisite for a healthy and long life | |
| OUTCE4 | True well-being can only be achieved by maintaining a healthy diet | |
| OUTCE5 | A healthy diet also makes me feel better mentally | |
| OUTCE6 | Many complaints of old age could be avoided if people ate healthier | |
| OUTCE7 | A sensible diet has a beneficial effect on every person's health | |
| OUTCE8 | It is certain that you live longer if you eat healthy | |
| Emotions | Based on | |
| EMO1 (information function) | When I buy healthy food products, I feel content/discontent | |
| EMO2 (relevance function) | When I buy healthy food products, I feel fulfilled/unfulfilled | |
| EMO3 (commitment function) | When I buy healthy food products, I feel proud/guilty | |
| EMO4 (speed function) | When I buy healthy food products, I feel calm/overwhelmed |
Source(s): Authors’ work