Finger Reading

A touch interaction technique used on accessible touchscreen interfaces where users continuously pan or slide their finger across the screen to explore content, receiving feedback for every position touched without encountering blank or unresponsive areas. In accessible data visualizations, finger reading ensures that the entire touch space is semantically populated with chart elements so that any touch by users always elicits a meaningful response. This approach facilitates continuous and intuitive exploration of data structures, similar to how a person might run their finger along a tactile graphic to understand its shape and features.