Online survey. Population of more than 50,000 smartphone users of a sustainability-pioneer manufacturing modular smartphones. In total, 3,801 subscribers and followers responded to the survey. The survey data was analyzed using descriptive statistics, binary logistic regression models, and multiple linear regression models.

The research group analysed relational, intrinsic and instrumental values across a total of six agricultural landscapes in Transylvania (Romania) and Lower Saxony (Germany). The landscapes described a gradient of land use intensity, within and across the countries. (…) The data collection preparation for the quantitative survey included extensive theoretical and literature studies on relational values and human-nature relationships. Building upon prior empirical work in the region the questionnaire development included two focus groups with laypersons to improve structure and wording of the questionnaire and a pilot study with n=20. The questionnaire contained parts on (1) utilisation of nature, (2) attitudes towards nature and nature conservation, (3) relational, intrinsic and instrumental values and (4) socio-demographic information. The study focused on nine relational values that were seen as important from prior research, instrumental and intrinsic values. Data were collected through face-to-face surveys, within randomly chosen villages within the focal landscapes. The researchers used proportionate sampling based on the population density of the villages in the focal landscapes. Within the villages the streets and households were sampled randomly. Surveys were conducted on various days of the week. After a second unsuccessful try, selected households were marked as dropouts. To decrease the dropout rate the principal investigators did not randomly select respondents within a given household. (…) Data were collected between April and July 2017. This resulted in a total sample size of n=819 across 52 villages (Romania n=22, Germany n=30).