Abstract
The dominant models of unilateral visuospatial neglect are
non-computational models. Tw o such models (Kinsbourne,
1970, 1993; Halligan & Marshall, 1994) rely on
conlralaterally oriented attentional systems in the two
hemispheres of the brain to capture the rich data from
neglect. The line-bisection task is a standard diagnostic
test that produces rich, detailed, elegant, quantitative data.
W e describe an implemented connectionist model of the
performance of neglect subjects in the line-bisection task.
O ur model demonstrates that both the central
characteristics of unilateral neglect and its task-specific
complexities may be derived directly from the bicameral
nature of the brain and the necessity for perceptual
processing to integrate a precisely divided visual world.
Our model is strictly divided at the input and hidden units,
but allows complex interaction at the output units. It
demonstrates the left-to-right graded nature of visuospatial
neglect across the whole visual field, together with the
detailed effects of midpoint displacement in the linebisection
task. Very idealised connectionist models of
hemispheric interaction can accurately capture detailed
patient data.
Original language | English |
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Title of host publication | Proceedings of the Seventeenth Annual Conference of the Cognitive Science Society |
Publisher | Lawrence Erlbaum Associates |
Pages | 142-147 |
Number of pages | 6 |
Publication status | Published - 1995 |