p307fig08.27 The distribution of transients through time at onsets and offsets of Ternus display flashes helps to determine whether element motion or group motion will be perceived.<BR>||  Ternus motion. Element motion: zero or weak transients at positions 2 and 3; Group motion: strong transients at positions 2 and 3.  Conditions that favor visual persistence and thus perceived stationarity of element (2,3) favor element motion (Braddick, Adlard 1978; Breitmeyer, Ritter 1986; Pantle, Peteresik 1980)