Questions and Answers
What are the two essential elements required for effective HCI design?
What does cognitive science explain in relation to HCI?
Human's capability and model of conscious processing of high-level information.
Match the aspects of human performance with their definitions:
Cognitive = Mental processes involved in perception and action Ergonomic = Physical interaction with the environment
GOMS stands for Goals, Operators, Methods, and _______.
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Visual modality is the least important information medium for HCI.
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What types of modalities are relevant to HCI?
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What does the term 'Gulf of Execution/Evaluation' refer to?
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What memory type is associated with short-term tasks?
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Study Notes
Human Factors as HCI - Theories
- Effective HCI design relies on understanding both computer factors (software/hardware) and human behavior.
- Human factors are divided into cognitive science (high-level information processing) and ergonomics (processing of sensory signals).
- Knowledge of human factors aids in task modeling, prediction of human reactions, and evaluation of interactive designs.
Human Information Processing
- Human Information Processing includes analysis of how humans solve problems through cognitive science.
- Task/Interaction Modeling formulates steps for interaction in problem-solving scenarios.
- Assessment of cognitive performance predicts mental reactions to different interface designs.
Sensation and Perception of Information
- Sensation interprets external stimuli while perception extracts meanings from sensory data.
- Human memory comprises short-term (working memory) and long-term memory; memory capacity impacts interaction performance.
- Effective interactive systems should support recognition rather than relying solely on recall.
Human Reaction and Prediction of Cognition
- The "Gulf of Execution/Evaluation" addresses user confusion when an interactive system lacks expected actions or outcomes.
- Cognitive and ergonomic factors together influence human performance in HCI environments.
Predictive Performance Assessment
- GOMS (Goals, Operators, Methods, and Selection) is a model used to estimate task completion time and evaluate performance.
- The GOMS model is crafted for desktop computing, accounting for tasks like mouse clicks and keyboard input.
Human Body Ergonomics
- Fitts's Law quantifies the relationship between the distance to a target and the size of the target, affecting ease of movement in HCI.
- Understanding motor control is essential for improving ergonomic interactions in interface design.
Modalities of Sensory Interaction
- Relevant sensory modalities for HCI include visual, aural, tactile, and haptic.
- Visual processing is crucial, with over 40% of the brain dedicated to interpreting visual information.
Visual Modality in HCI
- Key properties of the human visual system impact interface design:
- Field of View (FOV) determines how much visual information can be processed simultaneously.
- Factors like color, brightness, contrast, and peripheral vision play significant roles in user experience.
- Pre-attentive features enhance the immediacy and relevance of information displayed.
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Description
Explore the essential concepts of human factors as they relate to Human-Computer Interaction (HCI) in this lesson. Understand human information processing, task modeling, and the impact of sensory perception on interaction. Additionally, delve into the ergonomics of human body movement and performance predictions.
