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Table 1 Membership scores for outcome of interest and variables (similar to 4-point scale in questionnaire)

From: Acceptability of innovative biomass heating plants in a German case study—a contribution to cultural landscape management and local energy supply

Membership scores Outcome of interest Items
0 Extremely unlikely implementation, rejection I completely disagree.
0.3 Unlikely implementation I mostly disagree.
0.5 Neither acceptance nor rejection* Neither agree nor disagree*.
0.7 Rather likely implementation I mostly agree.
1 Very likely implementation, acceptance I completely agree.
  1. *Items are not used in the questionnaire but have to be defined as qualitative anchor according to the QCA rules