By Jon Barwise
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Extra resources for The situation in logic
_ \ I I An important property of a dipole field is , I I I \ I I I this: If a test input excites a particular on-cell, 11\'1 / 1 1 II /11 then the on-cell inhibits its off-cell. The \ " '--"" / I inhibited off-cell can, in turn, disinhibit a ..... .... ",/ ...... nearby off-cell due to the tonic arousal input Ie) and the recurrent anatomy within the off-cell field. The disinhibited off-cell thereupon Figure 15. ), a. dial symmetry is inhibits its on-cell via dipole interactions. inspected for a.
And F(2) elicit interfield signals that mutually reinforce each other, and activities at both levels are amplified and locked into STM. Because the STM activities can now persist much longer in time than the passive decay rates of individual cells, the slowly varying feed-forward filters and feedback expectancies have sufficient time to sample the STM patterns and store them in LTM. I call this dynamical state an adaptive resonance. The resonant state provides a global in terpreta tion of the afferent data, or a context-dependent code, that explicates in neural terms the idea that the network is paying attention to the data.
Of special importance is the observation that unless resonance occurs, no coding in L TM can take place. This observation clarifies from a mechanistic viewpoint the psychological fact that a relationship exists between paying attention to an event and coding it in LTM (Craik & Lockhart, 1972; Craik & Tulving, 1975). The resonant state provides a contextdependen t code due to several factors acting together. For example, the pattern of expectancy feedback can alter, through a matching process, the activity that a given.