Mr. Potato Head Mr. Potato Head Human-Computer Interaction Project 2004 by: Dory Azar André Cloutier Danny Castonguay Wadih Maalouf

Mr. Potato Head: Mr. Potato Head: - “Gesture-based” game designed for the shared reality environment - Children ages: 4 to 6 years old Design Goals:- Design Goals: - Hand-eye coordination - I - Introduce children to computers - Entertainment (it’s a game!)

Real Mr. Potato Head Java Applet “Mr. Potato Head”

Learnability: Learnability: Children should be able to learn how to pick, drag and drop in less than a minute Affordance: Affordance: A child new to the system should attempt to drag the camera, reset button and trash can no more than 2-3 times Feedback: Feedback: Fewer than 5% of children should click the camera button multiple times due to uncertainties as to what it does and whether or not it worked

Children can’t read Clear/Reset buttons confusing Garbage can function unclear

Changes with respect to paper prototype feedback: Removal of Clear button: the one that clears the workspace Replacement of “Reset” text button by a button showing an unused potato Garbage can appears only when picture is taken

Strengths: Operations supported by the system are clearly visible Good use of audio feedback Interface is clear, simple, and well organizedWeaknesses: Clear button still not easy to understand Confusing button colors Garbage can function still not clear No help or documentation

Changes made with respect to Kidz Corner Comments: Clear button picture changed Button colors changed Garbage can lid opens when an image is selected Addition of Potato Helper Addition of a sample Potato Head for children to imitate

Strengths: Once again interface is clear and simple Good animation for the garbage canWeaknesses: Potato Helper and Sample Potato are confusing Many functions are still not implemented Clear button picture not understood Audio error messages should be added

Resolution of previously detected problems: Potato Helper Clear button Removal of Sample Potato Animation added for trashcan Tutorial feature added Audio error messages added Final Implementation Decision: Use of Java

Error prevention measures added and feedback: Shadow when object is picked up An “X” appears when moved to an illegal area In the cave: Gestures have been mapped Selection in X coordinate worked fine

Design Techniques: Early focus on user population Iterative design HCI Principles followed: Visibility Visibility Feedback Help and Documentation