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Range adaptation in schizophrenia: A one-year longitudinal study.

Ling-Ling Wang1,2,3, Jing-Bo Gong4, Yi-Hang Huang2,3

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Altered range adaptation in schizophrenia (SCZ) may link to motivation and pleasure (MAP) deficits. This study found range adaptation performance tracked changes in MAP symptoms over one year in SCZ patients.

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Area of Science:

  • Cognitive neuroscience
  • Psychiatry
  • Clinical psychology

Background:

  • Range adaptation is crucial for stimulus value representation.
  • Motivation and Pleasure (MAP) deficits are common in schizophrenia (SCZ).
  • Altered range adaptation may underlie MAP deficits in SCZ.

Purpose of the Study:

  • To investigate the longitudinal relationship between range adaptation performance and MAP symptoms in SCZ patients.
  • To determine if range adaptation to outcome value (OV) and expected value (EV) predicts changes in MAP symptoms.

Main Methods:

  • Recruited 26 SCZ patients for a 1-year follow-up study.
  • Assessed range adaptation to OV and EV using an experimental task at baseline and 1-year follow-up.
  • Correlated adaptation performance with MAP symptoms (e.g., avolition, pleasure experience).

Main Results:

  • A baseline negative correlation was found between OV adaptation and avolition symptoms.
  • The 1-year change in EV adaptation negatively correlated with changes in self-reported pleasure experience.
  • These findings suggest range adaptation is dynamic and linked to symptom fluctuations.

Conclusions:

  • Range adaptation performance may serve as a biomarker for tracking longitudinal changes in MAP symptoms in SCZ.
  • Interventions targeting range adaptation could potentially improve MAP deficits in schizophrenia.
  • Further research is warranted to explore the therapeutic implications of these findings.