Visual Perception and Curve Tracing in Form and Integrative Agnosia

.............................................................................................................................................24 Introduction........................................................................................................................................25 Section A..............................................................................................................................................29 Demonstrating visual agnosia..........................................................................................................31 Perceptual Locus of Deficit .............................................................................................................34 Distinguishing form agnosia and integrative agnosia...................................................................38 Section B..............................................................................................................................................42 Experiment 1: Segmenting overlapping line drawings..................................................................44 Experiment 1a: Name verification...................................................................................................49 Experiment 1b: Matching and tracing task.....................................................................................52 Experiment 1c: Tracing from a name............................................................................................54 Experiment 1d: Detecting distinctive textures...............................................................................55 Experiment 2a: Curve tracing simple lines.....................................................................................58 Experiment 2b: Inside-outside relations in an ‘amoeba’..............................................................62 Experiment 2c: Overlapping Amoebae...........................................................................................64