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Related Experiment Videos

Trail making and olfaction in schizophrenia: implications for processing speed.

Nora Goudsmit1, Rachel Wolitzky, Regine Anna Seckinger

  • 1Department of Medical Genetics, New York State Psychiatric Institute, New York, NY 10032, USA.

CNS Spectrums
|April 30, 2004
PubMed
Summary
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Schizophrenia patients with smell identification deficits (SID) showed slower processing speeds on the Trail Making Test. This suggests a link between cognitive processing speed and SID in schizophrenia.

Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Previous studies link smell identification deficits (SID) to cognitive impairments in schizophrenia patients.
  • The relationship between specific cognitive functions and SID requires further investigation.

Purpose of the Study:

  • To explore the association between SID and the Trail Making Test (TMT).
  • To determine if processing speed, as measured by the TMT, is related to SID in schizophrenia.

Main Methods:

  • The study included 60 inpatients from a specialized schizophrenia research unit.
  • Analyses controlled for age, deficit syndrome, verbal IQ, and education due to their known impact on smell identification.

Main Results:

Related Experiment Videos

  • Regression analysis indicated that Trails A errors and time significantly predicted variance in University of Pennsylvania Smell Identification Test scores (R2=.10, P=.008 and R2=.05, P=.04, respectively).
  • These findings suggest a quantifiable relationship between processing speed and smell identification ability.

    • Conclusions:

    • Smell identification deficits may serve as a neurocognitive marker in schizophrenia research.
    • Further research linking neurocognition and SID is essential for understanding schizophrenia.