Progress bar

Adopting the concept to computing, the first graphical progress bar appeared in Mitchell Model's 1979 Ph.

[1] In 1985, Brad Myers presented a paper on “percent-done progress indicators” at a conference on computer-human interactions.

[2] Myers' research involved asking people to run database searches, some with a progress bar and some without.

Consequently, progress bars often exhibit non-linear behaviors, such as acceleration, deceleration, and pauses.

Finally, the graphical design of progress bars has also been shown to influence humans' perception of duration.