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Recent evidence suggests that such spatial mappings extend beyond numbers to include visual speed. Whether a second-order motion property, such as visual acceleration, is also spatially represented remains unclear. We addressed this question in two experiments using a centrally presented random dot kinematogram (RDK). Participants indicated, via lateralised key presses, whether the stimulus decelerated or accelerated relative to an initial constant-speed reference. In Experiment 1, all dots moved coherently in a single direction randomly selected on each trial. In Experiment 2, dot directions were randomised at the element level, creating an isotropic motion field. A distance effect (i.e., faster responses for larger absolute acceleration values) emerged in both experiments, indicating that acceleration was processed as a continuous magnitude. Crucially, a left-to-right spatial mapping emerged only in Experiment 2. 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