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Stability of Temporal Processing Effects in Aphasia.

Matthew J Sayers1, Robert W Wiley2, Jessica Obermeyer3

  • 1Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL.

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|January 30, 2026
PubMed
Summary
This summary is machine-generated.

Temporal processing in aphasia is stable, with effects varying by task and delay. This research clarifies how response delays impact accuracy in people with aphasia (PWA) and controls.

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Area of Science:

  • Neuroscience
  • Psycholinguistics
  • Speech and Language Pathology

Background:

  • Aphasia language impairment is linked to temporal processing disruptions in lexical activation.
  • The interactive activation model identifies transmission and maintenance as key temporal components.
  • Response delays in language tasks reveal temporal processing deficits in people with aphasia (PWA).

Purpose of the Study:

  • To investigate the stability of temporal processing effects in PWA and neurotypical controls.
  • To determine if accuracy changes with response delays are stable effects or random performance fluctuations.
  • To assess the impact of varying response intervals on language task performance.

Main Methods:

  • Collected naming and repetition data from 8 PWA and 10 controls.
  • Administered tasks with 1-, 5-, and 10-second response delays.
  • Utilized logistic mixed-effects models to analyze accuracy and stability of temporal effects across multiple timepoints and sessions.

Main Results:

  • Temporal processing effects were found to be stable across multiple days for most PWA and controls.
  • Eleven of 12 temporal processing effects were stable in PWA, and 6 of 8 in controls.
  • Performance patterns demonstrated interactions between temporal processing effects, task type, and response interval duration.

Conclusions:

  • Temporal processing deficits in aphasia exhibit stability over time.
  • Response delays consistently impact language task accuracy in PWA and controls.
  • Findings contribute to understanding the temporal dynamics of lexical activation in typical and impaired language processing.