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reference | On the rate of gain of information, Selection from alphabetic and numeric trees using a touch screen: Breadth, depth, and width |
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related knowledge | Закон Фиттса |
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supported by | |
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tag | Performance time, Menu, Interface element |
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text (english) | Hick’s law (Hick, 1952) is another important regularity found in the field of human-computer interaction and applies to choice response time. In it’s simple form (which presumes that high level of accuracy is maintained), it states that the response time is a function of a number of alternatives from which the choice is to be made. The formula for the Hick’s law is thus the following: where RT represents response time to select from n equally probable alternatives; a and b are constants defined from regression. In human-computer interaction the Hick’s law is generally used to justify menus design (Landauer and Nachbar, 1985), in the form of the rule that in menus ‘width’ is preferred over ‘depth’. It means that in terms of selection time one large menu is preferable than several smaller sub-menus. Although many other considerations may apply to menus design as well (such as good menu hierarchies, users’ familiarity, frequency of menu items’ usage, etc.), Hick’s law provides an important basis for related HCI decisions that are to be made by a designer. *** Generally, several types of human reaction time are identified, of which two can be considered most important in HCI: simple reaction time, with one stimulus and one possible response, and choice reaction time, with several possible stimuli and corresponding responses. The latter is described by Hick’s or the Hick-Hyman law [6], stat-ing that reaction time (RT) required to choose from N equally probable choices is: (3) Hick’s law also has sound empirical evidences as well as practical implications for HCI and interface design. For example, it was argued in [8] that “wide” menu hierarchies are generally preferable to “deep” ones in terms of user performance time. In the same work, a combination of Hick’s and Fitts’ laws was used to model computer input task, by splitting it into choice component and movement component. |
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text (russian) | Время реакции (RT) при выборе из нескольких (N) равновероятных известных альтернатив пропорционально логарифму количества альтернатив: RT = k * log2(N+1) Таким образом, k – это время, за которое человек обрабатывает 1 бит информации при совершении описанного выше выбора. |
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