FIGURE 18.3. (See color insert.


(See color insert.) Development of cross-modal integration for size and orientation discrimination. Illustration of experimental setup for size (a) and orientation (d) discrimination. Sample psychometric functions for four children, with varying degrees of cross-modal conflict. (b and c) Size discriminations: SB age 10.2 (b); DV age 5.5 (c); (e and f) orientation discrimination: AR age 8.7 (e); GF age 5.7 (f). Lower color-coded arrows show MLE predictions, calculated from threshold measurements (Equation 18.1). Black-dashed horizontal lines show 50% performance point, intersecting with curves at their PSE (shown by short vertical bars). Upper color-coded arrows indicate size of haptic standard in size condition (b and c) and orientation of visual standard in orientation condition (e and f). Older children generally follow the adult pattern, whereas 5-year-olds were dominated by haptic information for size task, and visual information for orientation task. For size judgment, amount of conflict was 0 for red symbols, +3 mm (where plus means vision was larger) for blue symbols, and –3 mm for green symbols. For orientation, same colors refer to 0° and ±4°.

From: Chapter 18, Multisensory Integration Develops Late in Humans

Cover of The Neural Bases of Multisensory Processes
The Neural Bases of Multisensory Processes.
Murray MM, Wallace MT, editors.
Boca Raton (FL): CRC Press; 2012.
Copyright © 2012 by Taylor & Francis Group, LLC.

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