Addressing very short stimulus encoding times in modeling schizophrenia cognitive deficit

Cognitive differences between deficit and non-deficit schizophrenia

A random process model of cognitive deficit in schizophrenia.

It is argued that in schizophrenic patients the process of selecting responses to incoming stimuli becomes increasingly random the more disturbed the patient is. This is seen as a disordered overextension of normal behavioral flexibility and variability. A model is proposed which considers the range of human behavior to be the result of perceptions of incoming stimuli compared to related analog...

Should cognitive deficit be a diagnostic criterion for schizophrenia?

This review examines the question of whether cognitive deficits in schizophrenia are sufficiently reliable, stable and specific to warrant inclusion in the diagnostic criteria for schizophrenia. The literature provides evidence that cognitive deficits are highly prevalent and fairly marked in adult patients with schizophrenia. Similar deficits have been found in children and adolescents with sc...

Generalized Polychotomic Encoding: A Very Short Bit-Vector Encoding of Tree Hierarchies

A well-known method to represent a partially ordered set P consists in associating to each element of P a subset of a fixed set S = {1, . . . , k} such that the order relation coincides with subset inclusion. Such an embedding is called a bit-vector encoding of P . Such encodings are economical with space and comparisons between elements can be performed efficiently via subset inclusion tests. ...

Linear Stimulus Encoding and Decoding

Experiments in sensory neurophysiology often record action potential arrival times of nerve cells resulting from spontaneous or stimulus-evoked activity. When all action potentials are taken to be identical and only their localized times of occurrence are considered, one obtains a discrete series of time events, t 1 ; : : : t n ; where t i = time of arrival of the i th spike, characterizing the...