An Overview of the “H” in HCI. laura leventhal. Reference. Chapter 14. Overview. This lecture is a whirlwind tour of some of the important psychological characteristics of people that impacts HCI. Psycholgy and UI Design.
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We are often able to take in multiple inputs and recognize them.
Driving, talking on cell phone, recognizing instructions from street signs.
Reading screen and hearing alarm sounds
Generation of output tends to be more serial.
Hear alarm, push button
We take in a number of inputs at once, even when some of the inputs are unrelated to the task at hand. So when we build an interface with lots of "extras", such as sounds and videos, we take those in, even as we are taking the task-related input in. It is very difficult to selectively close out some of these inputs, even if they are unrelated to the task. And, just like computer inputs, even the input from the "extras" requires processing.
Because generation is more serial, we tend to produce (generate) activities more in sequence.
Visual system is like a camera, different in some critical ways (from simple camera!):
Eye is in a fixed position and the shape is distorted by various muscles.
Light sensitivity varies across the retina. It is best in the center and worst at the edges.
Two eyes permit depth perception.
People can become fatigued when they receive visual input from a user interface. When it is likely that your user will become fatigued from visual input, consider having an alternative presentation modality, such as audio.
whole words or phrases, morphemes, syntax, semantics
If we disrupt "normal" patterns of words, with strange combinations of font types and sizes for example, it is difficult to read because we see individual characters rather than patterns of characters.