Der „National Aeronautics and Space Administration-Task Load Index“ (NASA-TLX) – ein Instrument zur Erfassung der Arbeitsbelastung in der hausärztlichen Sprechstunde: Bestimmung der psychometrischen Eigenschaften

Translated title of the contribution: The “National Aeronautics and Space Administration-Task Load Index” (NASA-TLX) – an instrument for measuring consultation workload within general practice: evaluation of psychometric properties

Kristina Flägel, Britta Galler, Jost Steinhäuser, Katja Götz*

*Corresponding author for this work
2 Citations (Scopus)

Abstract

Objective: The aims of the study were the translation and a first reflection of the psychometric properties of the Aeronautics and Space Administration-Task Load Index (NASA-TLX), a multidimensional instrument to measure workload in general practice. Methods: During April and September 2015, the NASA-TLX was translated and evaluated. For this purpose, a questionnaire composed of the NASA-TLX items and others items related to demographic data, was developed. Postgraduate family medicine trainees and family physicians were then asked to assess patient consultations by applying the questionnaire. The psychometric properties of the NASA-TLX were identified using explorative and confirmatory factor analysis. Reliability was assessed using Cronbach's α. Results: Overall, 16 participants completed 769 surveys after a single patient consultation. The highest average was observed for the item ‘mental demand’ (mean 6.9 ± 5.4), followed by the item ‘effort’ (mean 6.6 ± 5.5). Factor analysis revealed a one-factor solution with an explained variance of 56.9 %. The German version of NASA-TLX demonstrated a high internal consistency (Cronbach's α = 0.84). Confirmatory factor analysis showed that there was an acceptable consistency between the expected unidimensional structure and the data. Conclusions: The German version of NASA-TLX provides preliminary indications of psychometric properties and presents an important tool to evaluate family physicians’ workload in direct patient contact.

Translated title of the contributionThe “National Aeronautics and Space Administration-Task Load Index” (NASA-TLX) – an instrument for measuring consultation workload within general practice: evaluation of psychometric properties
Original languageGerman
JournalZeitschrift fur Evidenz, Fortbildung und Qualitat im Gesundheitswesen
Volume147-148
Pages (from-to)90-96
Number of pages7
ISSN1865-9217
DOIs
Publication statusPublished - 11.2019

Research Areas and Centers

  • Research Area: Center for Population Medicine and Public Health (ZBV)

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