Table 1.
Vignette dimensions, dimension levels, vignette text, and willingness to participate by vignette levels (n = 1,947)
| Dimensions | Dimension levels | Vignette text (translated into English) | Percent willing to participate | |
|---|---|---|---|---|
| Sponsor | 3 levels | Statistical agency | …a German statistical agency… | 33.1% |
| University | …a German university… | 36.9% | ||
| Market research company | …a German market research company… | 35.6% | ||
| Topic | 3 levels | Consumer behavior | …about how consumers search for and buy products and services on their smartphones… | 36.1% |
| Mobility | ...about how people move around in their everyday life… | 35.3% | ||
| Social interaction | …about how people interact with others through their smartphone… | 34.2% | ||
| Study duration | 2 levels | One month | …for one month… | 37.9% |
| Six months | …for six months… | 32.5% | ||
| Additional survey questions | 2 levels | Yes | Apart from the automatic data collection, the app will not send you any invitations to questionnaires. | 35.7% |
| No | In addition to automatically collecting data on the smartphone, the app will send you invitations to fill out short questionnaires with just one or two questions on your smartphone about once a week. | 34.7% | ||
| Incentives | 4 levels | None | No monetary incentive is provided for participating in the study. | 19.5% |
| 10 Euro for downloading | For downloading the app you will receive 10 Euro. | 38.3% | ||
| 10 Euro at end of study | For downloading the app and leaving it installed on your smartphone until the end of the study, you will receive 10 Euro. | 37.1% | ||
| Both 10 Euro for downloading and 10 Euro at end of study | For downloading the app you will receive 10 Euro. In addition, for leaving the app installed on your smartphone until the end of the study you will receive 10 Euro. | 46.1% | ||
| Option to switch off app | 2 levels | Yes | The research app allows you to switch it off at times when you do not want it to collect any data from your smartphone. However, it is important for this study that you use this option only in rare cases and for short periods. | 33.1% |
| No | There is no option to switch the research app on and off during the course of the study. | 37.3% |