Cognitive Model for Probability Density Distribution Uncertainty Visualization

Many scholars have conducted research on how to visually express the uncertainty contained in data, so how users recognize and understand these visualizations has become a problem that needs to be explored. This paper studies the user's perception of probability under the triangular distribution and verifies the effectiveness of visualization using lightness gradient. We found that the participant’s perception probability of a test point has a strong correlation with the true value of the probability density of that point.