State Transition Networks - Three-State Model, Glimpse Model, Physical Models, Fitts’ Law

Introduction

State Transition Networks (STNs) are a fundamental concept in Human Computer Interaction (HCI). They provide a graphical representation of the states an interactive system can be in, and the transitions between these states.

Three-State Model

The Three-State Model is a simple STN that includes three states: Start, Middle, and End. It's useful for understanding basic interactions but lacks complexity for more advanced scenarios.

Glimpse Model

The Glimpse Model is a more complex STN. It includes additional states like 'Glimpse' and 'Focus', allowing for a more nuanced understanding of user interaction.

Physical Models

Physical Models in HCI are representations of the physical world that help users understand and interact with digital systems. They can be based on real-world objects or abstract concepts.

Fitts' Law

Fitts' Law is a predictive model in HCI that calculates the time required to rapidly move to a target area. It's used in many areas of HCI, including interface design and ergonomics.

Conclusion

STNs are a crucial part of HCI, providing a way to understand and design complex interactive systems. The Three-State Model, Glimpse Model, Physical Models, and Fitts' Law are all important tools in this field.

Summary

State Transition Networks (STNs) are a key concept in HCI, providing a graphical representation of the states an interactive system can be in, and the transitions between these states. The Three-State Model, Glimpse Model, Physical Models, and Fitts' Law are all important tools in understanding and designing these systems.

Analogy

Think of State Transition Networks like a roadmap. Each state is a city, and each transition is a road between cities. Just like you can't get from one city to another without a road, you can't get from one state to another without a transition.