This chapter presents a computational theory of selective attention in vision. The theory was originally published under the title A Theory of Visual Attention (Bundesen, 1990), and it is now called TVA. The theory originated from earlier models of visual selectionin particular experimental tasks. To put the theory in perspective, I describe its development. First I present a choice model for visual selection from displays with multiple elements. Building on work by Luce (1959), Sperling (1967), and others, my collaborators and I developed the choice model in the early 1980s (Bundesen, Pedersen, & Larsen, 1984). The choice model provides a rule for calculation of selection probabilities, and it is easy to apply.