Observation

  1. Study with a User
    • Observation Basics
      • Why, what, where and when to evaluate
    • Observation Metrics and Objectives

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  • Evaluation Classes(Components)

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  • Study Methods (many)

    • Interviews
      • Forms
        • structured
        • semi-structured
        • unstructured
      • Running an interview
        • Introduction
        • Warm-up
        • Main body
        • A cool-off period
        • Closure
    • Questionnaire
      • System Usability Scale (SUS)
      • NASA Task Load Index (TLX)
      • User Experience Questionnaire (UEQ)
    • THINK ALOUD
      • Preparation (image 1)
      • Perform the study (image 2)
      • Finalize (image 3)

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    • WORKLOAD MEASUREMENT
      • Good Workload Measure Criteria
        • Sensitive: Detects task demand changes.
        • Selective: Ignores irrelevant factors.
        • High Bandwidth: Tracks rapid changes.
        • Unobtrusive: Doesn’t disrupt tasks.
        • Reliable: Consistent results.
        • Diagnostic: Identifies workload sources.
      • Assessment Methods
        • Primary Task: Direct performance (e.g., speed, accuracy).
        • Secondary Task: Indirect (e.g., tapping, reaction time).
        • Physiological: ECG, EEG, eye-tracking (needs conditioning).
        • Subjective Ratings: Easy, non-intrusive (e.g., NASA-TLX).
      • NASA-TLX Overview
        • 6 Factors: Mental, physical, temporal demand, effort, performance, frustration.
        • Step 1: Rate each (0–100).
        • Step 2: Pairwise comparisons to weight importance.
        • Final Score: Weighted sum (0–100).
        • Balances subjectivity with structured comparison.
    • OBSERVATION AND ETHNOGRAPHY

  • Participants

  • Study Documentation

  • Study Wrap-Up

    1. Study without a User
    2. Human Memory and Study Methods