The chapters in this section of the volume reveal the striking variety of human numerical cognition. The section comprises four chapters that focus on different aspects of the representation of numerical knowledge, as well as three chapters that examine the several cognitive processes involved in the manipulation of numbers during simple mental arithmetic. They show how chronometric analyses, in combination with clever experimental designs, can reveal the cognitive processes and representations underlying this impressive collection of cognitive skills. Our goal in (...) this overview chapter is to highlight common themes that connect these contributions. In particular, we suggest links between the present contributions, all of which are firmly grounded in the traditional information-processing approach to the human mind, and the more recently emerged embodied cognition perspective, according to which all knowledge representations remain associated with those sensory and motor features that were activated during acquisition of that knowledge. (shrink)

A dual-code model of number processing needs to take into account the difference between a number symbol and its meaning. The transition of automatic non-abstract number representations into intentional abstract representations could be conceptualized as a translation of perceptual asemantic representations of numerals into semantic representations of the associated magnitude information. The controversy about the nature of number representations should be thus related to theories on embodied grounding of symbols.

The study has two objectives: to introduce grip force recording as a new technique for studying embodied numerical processing; and to demonstrate how three competing accounts of numerical magnitude representation can be tested by using this new technique: the Mental Number Line, A Theory of Magnitude and Embodied Cognition account. While 26 healthy adults processed visually presented single digits in a go/no-go n-back paradigm, their passive holding forces for two small sensors were recorded in both hands. Spontaneous and unconscious grip (...) force changes related to number magnitude occurred in the left hand already 100–140 ms after stimulus presentation and continued systematically. Our results support a two-step model of number processing where an initial stage is related to the automatic activation of all stimulus properties whereas a later stage consists of deeper conscious processing of the stimulus. This interpretation generalizes previous work with linguistic stimuli and elaborates the timeline of embodied cognition. We hope that the use of grip force recording will advance the field of numerical cognition research. (shrink)