My HCI Notes

Observation Study with a User Observation Basics Why, what, where and when to evaluate Observation Metrics and Objectives Evaluation Classes(Components) 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) 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 Study without a User Human Memory and Study Methods

May 5, 2025 - 22:14

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