The ability to represent, discriminate, and perform arithmetic operations on discrete quantities (numerosities) has been documented in a variety of species of different taxonomic groups, both vertebrates and invertebrates. We do not know, however, to what extent similarity in behavioral data corresponds to basic similarity in underlying neural mechanisms. Here, we review evidence for magnitude representation, both discrete (countable) and continuous, following the sensory input path from primary sensory systems to associative pallial territories in the vertebrate brains. We also speculate (...) on possible underlying mechanisms in invertebrate brains and on the role played by modeling with artificial neural networks. This may provide a general overview on the nervous system involvement in approximating quantity in different animal species, and a general theoretical framework to future comparative studies on the neurobiology of number cognition. (shrink)

Valence is a central component of all affective states, including pains, pleasures, emotions, moods, and feelings of desire or repulsion.This paper has two main goals. One is to suggest that enough is now known about the causes, consequences, and properties of valence to indicate that it forms a unitary natural-psychological kind, one that seemingly plays a fundamental role in motivating all kinds of intentional action. If this turns out to be true, then the correct characterization of the nature of valence (...) becomes an urgent philosophical issue. There appear to be just two accounts that have the required generality. According to one, valence is a nonconceptual representation of value. According to the other, valence is an intrinsic qualitative property of experience. The second goal of the paper is to contrast and evaluate these two views of the nature of valence, drawing on the relevant empirical findings. Overall, I suggest that the representational account is more plausible. (shrink)

Affective valence is increasingly thought to be the common currency underlying all forms of intuitive, non-discursive decision making, in both humans and other animals. And it is thought to constitute the good or bad (pleasant or unpleasant) aspects of all desires, emotions, and moods. This article contrasts two theories of valence. According to one, valence is an experience-directed imperative (‘more of this!’ or ‘less of this!’); according to the other, valence is a representation of adaptive value or disvalue. The latter (...) is shown to provide the better account. (shrink)

The goal of this paper is to explore forms of metacognition that have rarely been discussed in the extensive psychological and philosophical literatures on the topic. These would comprise explicit instances of meta-representation of some set of mental states or processes in oneself, but without those representations being embedded in anything remotely resembling a theory of mind, and independent of deployment of any sort of concept-like representation of the mental. Following a critique of some extant suggestions made by Nicholas Shea, (...) the paper argues that appraisals of the value of cognitive effort involve the most plausible instances of this kind of metacognition. (shrink)

The dual-code proposal of number representation put forward by Cohen Kadosh & Walsh (CK&W) accounts for only a fraction of the many modes of numerical abstraction. Contrary to their proposal, robust data from human infants and nonhuman animals indicate that abstract numerical representations are psychologically primitive. Additionally, much of the behavioral and neural data cited to support CK&W's proposal is, in fact, neutral on the issue of numerical abstraction.