Exploring Reference Frame Integration Using Response Demands in a Tactile Temporal-Order Judgement Task

Abstract Exploring the world through touch requires integration of internal (e.g., anatomical) and external spatial) reference frames — you only know what when where your hands are in space. The deficit observed tactile temporal-order judgements crossed over midline provides one tool to explore this integration. We used foot pedals required participants focus on either hand that was stimulated first (an anatomical bias condition) or location (a spatiotopic condition). Spatiotopic-based responses produce a larger crossed-hands deficit, presumably by focusing observers frame. In contrast, anatomical-based observer frame smaller deficit. This manipulation thus evidence can change relative weight given each quantify effect using probabilistic model produces population estimate show result (Experiment 1) 2) provide an explanation would occur.