Abstract

LaBerge's Triangular Theory of Attention contributes to several important topics in the study of visual attention. First, it expands on the discussion of whether attentive influences manifest themselves as neural suppression or enhancement; LaBerge seems to favour the enhancement viewpoint. Second, the paper proposes circuit loops that may be responsible for the observed enhancement. Finally, a link between awareness and attention is explored and the claim that a representation of self must be considered is made. Here, it will not be possible to provide sensible discussion on all of these points; rather, the focus will be on the first issue, namely whether attention is manifested as enhancement or suppression. I claim that observations of enhancement or suppression depend very much on exactly how measurements are taken. Specific predictions are made: a given neuron exhibits enhanced or suppressed responses as a result of attentive influence depending on where that neuron is located in relation to the three-dimensional structure of attentive influences within the visual processing network. I show here a local, internal, attention control mechanism as an alternate model that provides an explanation for both enhancement and suppression of neural responses. In addition, it solves an important second problem for attention models, namely, information routing, within the same mechanism. The routing problem seems to be ignored by LaBerge.