Gallistel has made experimental and theoretical contributions to several areas of behavioral and
cognitive neuroscience: 1) The nature and development of the representation of numerosity in young children, in collaboration with his wife,
Rochel Gelman. 2) The psychophysical analysis of the neural substrate for electrical self-stimulation of the brain. 3) The theory of action and its close relation to the theory of motivation. 4) The theory of learning. 5) What it means to say that brains represent the experienced world. 6) The brain's representation of the abstract variables central to conceptions of space (distance & direction),
time (duration and phase), numerosity, rate (number/duration) and probability (subset numerosity/set numerosity). 7) The nature of the
engram, the physical realization of memory in brains. Gallistel is an advocate of the
computational theory of mind, and as such he criticized the view of memory as an alteration of synaptic connections (a view that is related to
Associationism). His critique, in particular, focuses on how the Associationist theory of mind allegedly cannot explain how the brain encodes quantitative data such as distances, directions, and temporal durations. Gallistel rather argues that such memories could be collected inside the neurons, at the molecular level, and to support his claim he remarks the considerable capacity of
polynucleotides for storing information. ==Books==