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Initial Development of a Multidimensional Computerized Adaptive Test for Intensive Longitudinal Assessment of Suicide

Kenneth McClure1, Brooke A Ammerman2, Cheng Liu3

  • 1Department of Mathematics and Statistics, University of Wyoming, 1000 E University Ave, Laramie, WY, 82071, United States, 1 3077666831.

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Summary
This summary is machine-generated.

The Computerized Adaptive Test for Suicide Risk Pathways (CAT-SRP) personalizes surveys, reducing participant burden in intensive longitudinal studies. This new method enhances the prediction of suicidal thoughts by assessing multiple risk domains efficiently.

Keywords:
computerized adaptive testingecological momentary assessmentmeasurementparticipant burdensuicide

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Area of Science:

  • Psychological Science
  • Medical Research
  • Behavioral Science

Background:

  • Intensive longitudinal designs, like ecological momentary assessment (EMA), are crucial for studying dynamic processes in medical and behavioral science.
  • However, participant burden from repetitive surveys limits EMA's scope, especially for complex phenomena like fluctuating suicide risk.
  • The Computerized Adaptive Test for Suicide Risk Pathways (CAT-SRP) was developed to address these limitations by personalizing survey content.

Purpose of the Study:

  • To develop, calibrate, and pilot the first multidimensional computerized adaptive test (CAT) for suicidal thoughts and related psychosocial risk factors.
  • To adapt existing instruments for use in intensive longitudinal designs and create a comprehensive item bank.
  • To evaluate the CAT-SRP's performance in reducing participant burden and improving the precision of suicide risk assessment.

Main Methods:

  • A web-based platform administered the CAT-SRP, adapting items from validated instruments for intensive longitudinal designs.
  • Item parameters were calibrated using a multidimensional graded response model in a large community sample (n=1759).
  • The CAT-SRP was evaluated in an EMA study (n=29) using D-optimal item selection, a dual variable-length stopping criterion, and MAP scoring.

Main Results:

  • The calibration identified 2 suicidal thought domains and 12 risk factor domains.
  • The CAT-SRP demonstrated low to moderate item overlap and incurred low participant burden.
  • The CAT-SRP showed potential for improved near-term prediction of suicidal thoughts compared to traditional EMA, though refinement of selection and stopping rules is needed.

Conclusions:

  • The CAT-SRP effectively personalizes EMA content, reducing repetitiveness and burden in intensive longitudinal research.
  • Multidimensional computerized adaptive testing (MCAT) provides nuanced measurement, addressing zero-inflation issues in EMA and strengthening predictive relationships.
  • The CAT-SRP offers significant methodological advantages for intensive longitudinal data collection in suicide risk research.