•  28
    Representation is space-variant
    with Giorgio Bonmassar
    Behavioral and Brain Sciences 21 (4): 469-470. 1998.
    Under shift, caused for example by eye movement, or by relative movement of the subject or object of perception, the cortical representation undergoes very large changes in “size” and “shape.” Space-variance of cortical representation rules out models that fundamentally require linear interpolation between shifted patterns (e.g., Edelman's model) or rigid shift of an invariant retinal stimulus corresponding to shift at the cortex (e.g., the shifter theory of van Essen). Recently, a computational…Read more
  •  16
    Neural representation of sensory data
    with Jonathan Polimeni
    Behavioral and Brain Sciences 25 (2): 207-208. 2002.
    In the target article Pylyshyn revives the spectre of the “little green man,” arguing for a largely symbolic representation of visual imagery. To clarify this problem, we provide precise definitions of the key term “picture,” present some examples of our definition, and outline an information-theoretic analysis suggesting that the problem of addressing data in the brain requires a partially analogue and partially symbolic solution. This is made concrete in the ventral stream of object recognitio…Read more