Fig. 4: Marginal means of the probability or rating for travelers’ entry conditioned by risk perceptions of COVID-19 with error bars of 95% confidence intervals.
From: COVID-19 health certification reduces outgroup bias: evidence from a conjoint experiment in Japan

The vertical lines show the random probability (0.33) for Panel a using the choice-based question (three options including “Neither should be admitted”), the mean (0.41) for Panel b using the rating-based question, and the random probability (0.5) for Panel c using the choice-based question (two options).