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A Tablet-Based Aphasia Assessment System "STELA": Feasibility and Validation Study.

Yoko Inamoto1, Masahiko Mukaino2,3, Sayuri Imaeda4

  • 1Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Toyoake, Japan.

JMIR Formative Research
|February 8, 2023
PubMed
Summary

The Short and Tailored Evaluation of Language Ability (STELA) significantly reduces language assessment time compared to traditional methods. This tablet-based system demonstrates strong validity and internal consistency for aphasia evaluation.

Keywords:
Cronbach αaphasiaassessmentauditory comprehensiondigital health interventiondigital mental health interventionheuristic evaluationinternal consistencynaming and sentence formationpsychological healthpsychometricreading aloudreading comprehensionrepetitionspeechstresssystem usabilitytabletvalidity

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Area of Science:

  • Neurolinguistics
  • Clinical Linguistics
  • Speech-Language Pathology

Background:

  • Traditional language tests can be time-consuming and cause patient distress.
  • The Short and Tailored Evaluation of Language Ability (STELA) is a tablet-based system designed for efficient language assessment.
  • STELA features a reduced item count and an automated testing process.

Purpose of the Study:

  • To evaluate the administration time of the STELA system.
  • To determine the internal consistency of the STELA.
  • To assess the validity of the STELA language assessment.

Main Methods:

  • The STELA utilizes a tablet application, microphone, and clinician keypad.
  • It assesses 5 modalities: auditory comprehension, reading comprehension, naming/sentence formation, repetition, and reading aloud.
  • Performance is scored as a correct answer rate (0-100) per modality, with an overall score out of 500.

Main Results:

  • STELA administration time was significantly shorter than the Western Aphasia Battery (WAB) (16.2 vs. 149.3 minutes).
  • STELA demonstrated strong concurrent validity, with high correlations between its scores and WAB Aphasia Quotient (r=0.93).
  • Excellent internal consistency was found across all modalities (Cronbach's α ranging from .787 to .961).

Conclusions:

  • The STELA system offers a significant reduction in language assessment duration.
  • Evidence supports the good internal consistency and validity of the STELA.
  • STELA is a viable tablet-based aphasia assessment tool.