Mammalian Choices: combining fast-but-inaccurate and slow-but-accurate decision-making systemsPeter Trimmer, Alasdair Houston, James Marshall, Rafal Bogacz, Elizabeth Paul, Mike Mendl, John McNamara, Mammalian Choices: combining fast-but-inaccurate and slow-but-accurate decision-making systems. Proceedings of the Royal Society B, 275(1649). ISSN 0962-8452, pp. 2353–2361. October 2008. PDF, 226 Kbytes. External information
Empirical findings suggest that the mammalian brain has two decision-making systems that act at different speeds. We represent the faster system using standard signal detection theory. We represent the slower (but more accurate) cortical system as the integration of sensory evidence over time until a certain level of confidence is reached. We then consider how two such systems should be combined optimally for a range of information linkage mechanisms. We conclude with some performance predictions that will hold if our representation is realistic.