Interaction
Fitts’s Law
For aimed movement, acquisition time tends to increase with target distance and decrease with target size along the movement axis.
Psychology, behavioral science, perception, human computer interaction, and usability principles explained for working designers.
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Interaction
For aimed movement, acquisition time tends to increase with target distance and decrease with target size along the movement axis.
Usability
Accept safe, unambiguous input variation where useful and produce predictable output, while rejecting ambiguity that threatens security or interoperability.
Mental models
An affordance is a possible action supported by the relationship between an actor’s capabilities and an object or environment.
Attention
People can follow one information stream amid competition, while personally relevant unattended material may sometimes capture awareness.
Gestalt
Visual perception organizes a scene into a focal figure and surrounding ground, with contrast and boundaries influencing which region receives focus.
Attention
People focused on a demanding task can fail to notice an unexpected, fully visible event outside their current attentional goal.