Model-based Design
Model-based Design is a systematic analytical approach in Human-Computer Interaction, focusing on predictive models that enhance interface design. The chapter covers the use of various quantitative models to evaluate user performance and interface efficiency, emphasizing the advantages and limitations of model-based evaluation compared to empirical methods. The Keystroke-Level Model (KLM) is highlighted for its utility in measuring expert user performance in routine tasks, along with the GOMS model for its more complex representations of user behavior.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- Model-based Design utilizes predictive models to refine interface design and situate user interactions more effectively.
- The chapter elaborates on models like KLM and GOMS that quantify user performance and guide designers in optimizing usability.
- While model-based evaluations can streamline the design process early on, they have limitations, particularly with novice users and complex tasks.
Key Concepts
- -- Modelbased Design
- A design methodology in HCI that employs theoretical models to predict user behavior and optimize interface design.
- -- KeystrokeLevel Model (KLM)
- A predictive model that estimates the time required for expert users to perform routine tasks using a sequence of defined operators.
- -- GOMS (Goals, Operators, Methods, Selection Rules)
- An advanced cognitive modeling framework that categorizes user knowledge into goals, methods to achieve those goals, and selection rules for method choice.
- -- Fitts' Law
- A model that predicts the time required to rapidly move to a target area, emphasizing the effects of target distance and size on interaction time.
- -- HickHyman's Law
- A model describing the relationship between the number of choices and the time taken to make a decision, suggesting that more options lead to increased decision time.
Additional Learning Materials
Supplementary resources to enhance your learning experience.