Interaction complexity describes the number of options that users need to consider before acting.

Mathematically, interaction complexity can be formulated as information entropy. Practically, it may be regarded as a property representing various measures, such as:

• The number of controls that users need to scan to find the one they need

• The number of menu items that they need to explore before getting the one required, or

• The number of setup parameters they need to consider before deciding whether the system would respond as desired.

Updated on 29 Feb 2016.