Alt Text for Scientific Figures: 3 Rules With Examples
Scientific figures can communicate complex information in seconds. But for readers using screen readers, a figure without meaningful alt text for scientific figures can become an information gap. Writing accessible alternative text is not simply about describing what an image looks like. The goal is to communicate the relevant information and purpose of the figure. Here are three practical rules. 1. Describe the Information, Not Just the Object Weak: Graph showing results. Better: Line graph showing treatment response increasing from 42% to 68% over a 12-week study period. The second description communicates information that the reader needs. 2. Keep the Purpose of the Figure in Mind Ask: Why is this figure included? If the figure demonstrates a trend, describe the trend. If it compares groups, explain the comparison. If it illustrates a process, describe the important steps. Avoid unnecessary visual details that do not contribute to understanding the research. 3. Know When Alt...