Index

Symbols

Image

20% Rule, 71-73

2001: A Space Odyssey (film), 34

A

Image

accuracy, Speed-Accuracy Tradeoff, 39-40, 62

activity flow, 116

actual durations, timing, 130. See also reality

defining, 131-132

methods, selecting, 133-134

precision, selecting, 132-133

user estimates, 135

adjustment method, measuring perceived durations, 137

affordance, 123

ambiguous time terminology, avoiding, 109-110, 112

ambiguous UI, avoiding, 123-124

animation of transitions, 61-62

anxiety.See stressful situations

apparent motion, 61

assessing tolerance, 138

cross-modality ...

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