Here’s a handy video playlist of me going over the 6 principles of interaction design.

And here’s the play by play with examples:

Introduction

https://youtu.be/sjkwx5551fQ

Feedback

https://youtu.be/rT79bvwXoFw

Here’s a great example of shared physical feedback.

Constraints

https://youtu.be/yaxeUZ-S3XQ

Check out this video on Music Bottles.  Notice how only so many bottles can fit on the table, and that the stoppers only fit in the necks of the bottles?  Those are physical constraints.

Visibility

https://youtu.be/4RRZ5D1wZJs

Affordances

https://youtu.be/Fg8Gz8dhW0M

The relationship between swings, public spaces, and humans affords swinging, and these ones play music.  Does that change how people use the swings?

Metaphor

https://youtu.be/gLjeW5rWMb8 

The IO Brush uses a very simple conceptual model of a regular paint brush to great effect.

Mapping

https://youtu.be/uDBxxYR3DwU

See this video about a hat that maps different sensor inputs to motion outputs to keep people from getting in your face! And see how NASA is mapping radio waves to sounds we can hear from the Cassini Saturn mission.

Closing

Now that you know the principles of interaction design, see if you can identify how each of them is used in the next interactive system you encounter.