A self-analysis of the NASA-TLX workload measure

Area of Science:

• Human-Computer Interaction
• Cognitive Psychology
• Ergonomics

Background:

• The proliferation of computer use in testing and material administration necessitates reliable workload assessment.
• Subjective workload measures are crucial for understanding user experience in digital environments.
• The National Aeronautics and Space Administration-Task Load Index (NASA-TLX) is a widely recognized tool for workload assessment.

Purpose of the Study:

• To compare the workload costs associated with computer-based versus paper-based administration of the NASA-TLX.
• To determine if the medium of administration affects the perceived workload.
• To provide insights into the practical implications of using digital workload assessment tools.

Main Methods:

• Administering the NASA-TLX in both computer-based and paper-based formats.
• Collecting and statistically analyzing workload scores from participants for each format.
• Comparing the workload scores between the two administration media.

Main Results:

• A significant difference in workload scores was observed between the computer and paper versions of the NASA-TLX.
• The computer-based administration of the NASA-TLX resulted in higher workload scores compared to the paper-based version.
• This suggests that the digital format itself contributes to increased perceived workload.

Conclusions:

• The computer version of the NASA-TLX imposes a greater workload on users than its paper counterpart.
• These findings have practical implications for the selection and implementation of workload measures in computer-based testing.
• Further research may be needed to optimize digital workload assessment tools to minimize extraneous cognitive load.