Figure 2. | Perceptual decisions are biased by the cost to act
Perceptual decisions are biased by the cost to act
University College London, United Kingdom; Center for Information and Neural Networks (CiNet), National Institute of Communications and Technology, Japan; Western University, Canada
Download figureOpen in new tabFigure 2. Schematic diagram illustrating the process of perceptual decision making, and the possible influence of the motor cost on the decision process.
Perceptual decision making consists of three different processing stages. First, the features of the sensory input are extracted and encoded as in the sensory representation. Second, the perceptual (categorical) decision is made based on this sensory representation (decision layer). Finally, the decision is transferred to the response effector. The motor cost asymmetry during the manual response can affect the perceptual decision making process in several different ways. (A) The motor cost for the manual response may only bias the decision layer that involves this response, but leave the decision layer for different response effectors unaffected. If this is the case, the bias observed during the manual response should not generalise to the verbal response. (B) The motor cost may bias the decision layer in general or (C) the sensory representation directly. In either of the latter two cases, the effect of motor cost should be also observable during the response using the different effector.