Which is the best example of a design metaphor?

What is the term "Feedback" (within the context of a design principle)?

In typography, the x-height is

Which type of motivation is most likely to sustain behavior change?

"This behavior feels good" is an example of what type of motivation?

What size is an app icon for the App Store?

Which is the best example of a design metaphor?

What is a weakness of A/B testing?

Which of these frameworks focuses on status and score to motivate competitive behavior?

Digital type is generally created as what kind of file type?