Figure 2.
Stimulus conditions. Local apparent motion occurred over a range of spatial displacements (Δx) and temporal displacements (Δt) arranged to systematically probe a number of Δx's at a fixed Δt (vertical columns), a number of Δt's at a fixedΔx (horizontal rows) and combinations of Δx and Δt that lead to a consistent speed (diagonal lines). Both infants and adults provided data for the conditions indicated by the filled circles. Adults provided additional data in the conditions indicated by the open circles.