TY - JOUR
T1 - Similarity in perception
T2 - A window to brain organization
AU - Solan, Z.
AU - Ruppin, E.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - This paper presents a neural model of similarity perception in identification tasks. It is based on self-organizing maps and population coding and is examined through five different identification experiments. Simulating an identification task, the neural model generates a confusion matrix that can be compared directly with that of human subjects. The model achieves a fairly accurate match with the pertaining experimental data both during training and thereafter. To achieve this fit, we find that the entire activity in the network should decline while learning the identification task, and that the population encoding of the specific stimuli should become sparse as the network organizes. Our results, thus, suggest that a self-organizing neural model employing population coding can account for identification processing while suggesting computational constraints on the underlying cortical networks.
AB - This paper presents a neural model of similarity perception in identification tasks. It is based on self-organizing maps and population coding and is examined through five different identification experiments. Simulating an identification task, the neural model generates a confusion matrix that can be compared directly with that of human subjects. The model achieves a fairly accurate match with the pertaining experimental data both during training and thereafter. To achieve this fit, we find that the entire activity in the network should decline while learning the identification task, and that the population encoding of the specific stimuli should become sparse as the network organizes. Our results, thus, suggest that a self-organizing neural model employing population coding can account for identification processing while suggesting computational constraints on the underlying cortical networks.
UR - http://www.scopus.com/inward/record.url?scp=0035143985&partnerID=8YFLogxK
U2 - 10.1162/089892901564144
DO - 10.1162/089892901564144
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AN - SCOPUS:0035143985
SN - 0898-929X
VL - 13
SP - 18
EP - 30
JO - Journal of Cognitive Neuroscience
JF - Journal of Cognitive Neuroscience
IS - 1
ER -