scholarly journals Testing the independence of neural representations of face identity and expression through multidimensional signal detection theory

2016 ◽  
Vol 16 (12) ◽  
pp. 1242
Author(s):  
Fabian Soto ◽  
Lauren Vucovich ◽  
F. Greg Ashby
Keyword(s):  
Signal Detection ◽  
Signal Detection Theory ◽  
Detection Theory ◽  
Face Identity ◽  
Neural Representations ◽  
Multidimensional Signal

Multidimensional Signal Detection Theory

2015 ◽  
Author(s):  
F. Gregory Ashby ◽  
Fabian A. Soto
Keyword(s):  
Signal Detection ◽  
Signal Detection Theory ◽  
Detection Theory ◽  
Response Alternative ◽  
Perceptual Independence ◽  
Multidimensional Signal ◽  
General Recognition Theory ◽  
Multivariate Probability Distribution ◽  
Recognition Theory ◽  
General Recognition

Multidimensional signal detection theory is a multivariate extension of signal detection theory that makes two fundamental assumptions, namely that every mental state is noisy and that every action requires a decision. The most widely studied version is known as general recognition theory (GRT). General recognition theory assumes that the percept on each trial can be modeled as a random sample from a multivariate probability distribution defined over the perceptual space. Decision bounds divide this space into regions that are each associated with a response alternative. General recognition theory rigorously defines and tests a number of important perceptual and cognitive conditions, including perceptual and decisional separability and perceptual independence. General recognition theory has been used to analyze data from identification experiments in two ways: (1) fitting and comparing models that make different assumptions about perceptual and decisional processing, and (2) testing assumptions by computing summary statistics and checking whether these satisfy certain conditions. Much has been learned recently about the neural networks that mediate the perceptual and decisional processing modeled by GRT, and this knowledge can be used to improve the design of experiments where a GRT analysis is anticipated.

So, Whatever Happened to Signal Detection Theory?

1995 ◽  
Vol 40 (10) ◽  
pp. 972-972
Author(s):  
Jerome R. Busemeyer
Keyword(s):  
Signal Detection ◽  
Signal Detection Theory ◽  
Detection Theory
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