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Table 1 Description of mental workload subscales in NASA task load index

From: Risk assessment of the work-related musculoskeletal disorders based on individual characteristics using path analysis models

Title

Descriptions

Endpoints

Mental Demand

Low/High

The required psychological and perceptual activity (e.g., thinking, calculating, remembering, deciding)

Physical Demand

Low/High

The required physical activity (e.g., pushing, pulling, swinging, handling, bending)

Temporal Demand

Low/High

The rate of time pressure felt during performing the task

Effort

Low/High

The level of effort demanded to achieve the optimal performance

Performance

Good/Poor

The Level of performance satisfaction in performing tasks

Frustration Level

Low/High

Feel insecure, discouraged, irritated, stressed, and annoyed versus secure, gratified, relaxed, and complacent during the task