What provides a moment-by-moment representation of a user's eye movement across a screen?

The correct answer is a gaze plot, which provides a precise moment-by-moment representation of a user's eye movements as they navigate a screen. Gaze plots visually depict where a user focuses their attention at specific times, often represented with dots or a continuous line on an interface. This method allows researchers and designers to understand the sequence and duration of a user's gaze across different areas of the screen, making it useful for analyzing user behavior and optimizing design elements for better engagement.

Other terms, although related to eye tracking, do not serve this specific purpose. Heat maps aggregate gaze data over time to show areas of most visual attention but do not indicate the exact path or timing of eye movements. Tracking maps may refer to the general tracking of movements but are less specific than gaze plots. An eye model typically refers to a theoretical construct or simulation of how human vision works rather than a practical representation of real user data. Hence, the gaze plot stands out as the best choice for capturing the dynamic aspects of eye movement in real-time situations.