title: Visual acceleration detection: effect of sign and motion orientation.
abstract: Thresholds for the detection of constant acceleration and deceleration of a discrete object moving along horizontal and vertical axes were studied. A staircase methodology was used to determine thresholds for three average velocities (0.7, 1.2, and 1.7 deg/sec). Thresholds, expressed as the proportion of velocity change, did not differ significantly among the average velocities; thus, a consistent Weber-like fraction is suggested by the data. Furthermore, there was an interaction between the axis of motion (horizontal or vertical) and the sign of the velocity change (acceleration or deceleration): accelerations were easier to detect along the vertical axis, decelerations along the horizontal axis.
authors.forename: J B
authors.initials: JB
authors.lastname: Calderone
authors.forename: M K
authors.initials: MK
authors.lastname: Kaiser
mesh_terms: D000054:Acceleration; D000328:Adult; D001288:Attention; D005260:Female; D005556:Form Perception; D006801:Humans; D008297:Male; D009039:Motion Perception; D009949:Orientation; D012684:Sensory Thresholds