Description: An optical illusion in data visualization can mislead viewers about the presented data. This phenomenon occurs when the visual representation of information leads to erroneous or confusing interpretations, often due to how the data is organized or presented. Optical illusions can arise from the manipulation of colors, shapes, sizes, or patterns, causing observers to perceive relationships or trends that do not actually exist. In the context of data visualization, these illusions can be both intentional and unintentional, and their impact can be significant in decision-making. For example, a bar chart that uses misleading scales can make a small difference appear much larger, distorting the viewer’s perception. Therefore, it is crucial for visualization designers to be aware of how their aesthetic choices can influence data interpretation. Clarity and accuracy are essential to ensure that information is communicated effectively, avoiding optical illusions that distract from the actual data and its implications.
