Are semantic networks of schizophrenic samples intact?

Neufeld, Richard W. J.

doi:10.1017/s0140525x0002851x

Cited by 1 publication

(1 citation statement)

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“…Although sharing a dimensional subspace, nonetheless, schizophrenia participants may have attended to idiosyncratic dimensions. A detailed assessment of findings from multidimensional scaling analyses and analyses of mnemonic organization is compatible with this possibility (Neufeld, 1984). Observe, however, that the influence of extraneous dimensions runs counter to the obtained conformity of observations to model predictions.…”

Section: Discussionmentioning

confidence: 89%

Cognitive processing of multidimensional stimuli in schizophrenia: Formal modeling of judgment speed and content.

Carter¹,

Neufeld²

1999

Journal of Abnormal Psychology

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This article presents a formal, mathematical account of relations between response times on simple cognitive tasks and content of complex judgments involving multiple stimulus dimensions for people with schizophrenia. Changes in multidimensional judgments were viewed as the result of interference from increased stages of encoding with respect to the individual dimensions. Information on dimensional properties encoded earlier in a judgment trial was considered to be more susceptible to loss over the rest of the trial, because of a larger number of encoding stages applied to the remaining dimensional properties. Model predictions were tested with samples of paranoid and nonparanoid schizophrenic participants and controls. Unidimensional encoding speed was assessed by reaction times in an explicit similarity ratings task, and multidimensional judgment content was assessed by the relative importance of different stimulus dimensions to participants' ratings in an implicit similarity ratings task. Results support validity of the model.

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Section: Discussionmentioning

confidence: 89%