“You only use what you understand.”
— Steve Jobs
Includes all text visible to the user.
Includes typography, imagery, icons, color palette, etc.
Includes computer keyboards, mice, trackpads, and touchscreens that users interact with and the space they interact within.
Includes all interactive elements that change over time, such as motions, sounds, and animations.
Includes how users react to an interaction - physically and emotionally.
In 1956, George Miller published the paper “The Magical Number Seven, Plus or Minus Two: Some Limits on Our Capacity for Processing Information”
More recent research (Baddeley, 1986) indicates the capacity is closer to 3-4 items
The ability of working memory to store short-term information can be increased by “chunking” data
Hick’s law estimates the time it takes for a person to make a choice as a result of the number of possible choices presented
T = b log2(n + 1)
b = empirically determined constant
n = number of choices
Mathematically expresses that performing the same physical action over a period of time tends to increase performance
Tn = T1 n-a + c
T1 = first time to perform task, n is number of trails
Tn = time to perform task after n times
a = .4
c = limiting constant
Fitt’s law (1954) is a model of human movement
T = k log2(D/S + 0.5), k ~ 100 msec.
T = Time to move the hand to target
D = distance between hand and target
S = size of target
https://www.interaction-design.org/literature/article/the-five-languages-or-dimensions-of-interaction-design https://www.interaction-design.org/literature/article/what-is-interaction-design https://www.mozilla.org/en-US/firefox/ https://products.office.com/en-ca/onenote/digital-note-taking-app https://optinmonster.com/11-web-design-principles-that-will-boost-your-conversion-rate/