This article is part of the theme issue 'Signal detection theory in recognition systems: from evolving models to experimental tests'.Īnimal behaviour insects psychology signal detection theory. Overall, we argue that SDT, as conventionally applied in psychological studies, may provide clearer insights into the mechanistic basis of decision making and information processing in behavioural ecology. However, further tests of the assumptions underlying SDT analysis are required. Focusing on the nest-mate recognition systems exhibited by social insects, we show how the quantitative application of SDT has the potential to transform acceptance rate data into independent indices of cue sensitivity and decision criterion (also known as the acceptance threshold). In this article, we will review the application of SDT in interpreting the behaviour of laboratory animals trained in operant conditioning tasks and then consider its potential in ecological studies of animal behaviour in natural environments. Signal detection theory (Green & Swets 1966 Signal detection theory and psychophysics SDT), which forms the basis of CAT models, has been widely used in psychological studies to partition the ability to discriminate sensory information from the action made as a result of it. 133, 407-435), which have been widely applied to explain ecological behaviour in animals, proposed how sensory information, prior information and the costs of decisions determine actions. Conspecific acceptance thresholds (Reeve 1989 Am.
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