Foundations of Cognitive Psychology: Preface - Preface
partx Music Cognition ...
Chapter 19 Neural Nets, Temporal Composites, and Tonality Jamshed J. Bharucha In this chapter, I outline a framework in which as ...
Frequency detectors can be found at almost all major stages in the auditory system, including the inner ear (Tasaki, 1954), the ...
peaks creates substantial overlap between the representations of patterns that differ only slightly in their tuning. The latter ...
tuning is an interesting issue that is beyond the scope of this chapter. For pres- ent purposes, it suffices to think of the set ...
ral units, as in spreading activation network models (J. R. Anderson, 1983; Collins & Quillian, 1969). The underlying mechan ...
patterns are essentially the same, but with different intensities, because what defines a pattern is therelativeintensities of i ...
anglewitheachoftheoriginalvectorsthantheymakewitheachother.Inmore than two dimensions, the resultant vector is the diagonal of t ...
before. Whensn¼0, there is no temporal integration—no memory except for themostrecentevent.Whensn¼1, events at different points ...
unit thus activates itself in proportion to its own current activation and the strength of the link. The strength of the link wi ...
The corresponding modal composites represent chord functions. Tonal compo- sites over longer durations represent keys, and modal ...
primes the target. Priming thus reveals the extent to which one stimulus evokes another. Priming tasks are well suited to studyi ...
Sections II,A–C deal with mechanisms that enable a network to learn pat- terns by finding an appropriate set of interconnections ...
middle panel), and the weights on the links feeding into the winning unit change by Hebbian learning. The links from strongly ac ...
If the input is a tonal composite, this procedure will lead to the formation of abstract feature detectors for typical composite ...
Aspectsoftonalitycanbethoughtofaspatterncompletion.Theresidualef- fect of prior exposure found in the responses of Indian listen ...
According to the delta rule, as adapted shortly, the weights are assumed to be random initially, representing a naive network. A ...
After learning, the network was presented with temporal composites that were similar to but not identical to one of the learned ...
commonly used functions in modeling hidden units is the logistic function (figure 19.9). This nonlinearity of hidden units enabl ...
wherete¼1ifeventeoccurs, 0 otherwise. This has the effect of changing the weight more radically when the unit into which it feed ...
«
18
19
20
21
22
23
24
25
26
27
»
Free download pdf