Figure 2.
The figure contains two Necessary Condition Analysis plots. The upper plot is labelled N C A Plot, A-P B I. The horizontal axis shows Attitudes ranging approximately from 7 to 30. The vertical axis shows pro-environmental behavioural intentions ranging from 4 to 20. Most observations cluster between Attitudes 15 to 28 and Pro-environmental behavioural intentions 12 to 20. Three lines are identified in the legend as O L S, C E F D H, and C R F D H. The O L S regression line slopes upward from approximately 13 at Attitudes 7 to approximately 18 at Attitudes 30. The C E F D H line forms a stepped ceiling boundary rising sharply near Attitudes 12 to a level close to 20 and then extending horizontally. The C R F D H line is at approximately 4 for Attitudes below 5. It increases sharply to approximately 20 at Attitudes around 12. It then remains horizontal at 20 for the remaining Attitudes values up to 30. The lower plot is labelled N C A Plot, S N-P B I. The horizontal axis shows Subjective norms ranging approximately from 7 to 25. The vertical axis shows pro-environmental behavioural intentions ranging from 4 to 20. Most observations cluster between Subjective norms 14 to 25 and Pro-environmental behavioural intentions 12 to 20. The legend lists O L S, C E F D H, and C R F D H. The O L S line slopes upward from approximately 12 at Subjective norms 7 to approximately 18 at Subjective norms 25. The C E F D H line forms a stepped ceiling boundary rising steeply near Subjective norms 8 to a level close to 20 and then extending horizontally. The C R F D H line is at approximately 4 for Attitudes below 3. It increases sharply to approximately 20 at Attitudes around 5. It then remains horizontal at 20 for the remaining Attitudes values up to 30.NCA plots
Note: Each of the blue dots represents an observation. The red line is the ceiling line. The empty area (upper-left) represents X, Y combinations that do not exist in the data, and the larger it is the stronger the generated size effects
Source: Authors’ own work