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	Legge di Hick-Hyman	Cognitive Walkthrough
Campo	Interazione uomo-macchina	Interazione uomo-macchina
Famiglia	Hypothesis test	Hypothesis test
Anno di origine	1952	1990
Ideatore	William Edmund Hick and Ray Hyman	Clayton Lewis, Peter Polson, Cathleen Wharton, John Rieman
Tipo	Empirical model of choice reaction time as logarithmic function of number of choices	Evaluative walkthrough examining how users learn to use an interface
Fonte seminale	Hick, W. E. (1952). On the rate of gain of information. Quarterly Journal of Experimental Psychology, 4(1), 11–26.	Lewis, C., Polson, P. G., Wharton, C., & Rieman, J. (1990). Testing a walkthrough methodology for specifying and evaluating user interface designs. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (pp. 387–392).
Alias	Hick's Law, Law of Choice Reaction Time	Cognitive Walkthrough, CW Analysis
Correlati	4	4
Sintesi	The Hick-Hyman Law predicts that human decision time increases logarithmically with the number of equally likely choices. Independently formulated by William Edmund Hick and Ray Hyman in the early 1950s, this law describes how long it takes a person to make a choice among alternatives. In human-computer interaction, the law is widely applied to menu design, navigation hierarchies, and command selection, showing that users take longer to select from larger sets of options, but the relationship is logarithmic, not linear.	Cognitive Walkthrough is an inspection method for evaluating interface designs by simulating and analyzing how users will learn to use a system through exploration and trial. Developed by Clayton Lewis, Peter Polson, Cathleen Wharton, and John Rieman in 1990, this method is grounded in cognitive psychology and focuses specifically on learnability—whether first-time or occasional users can discover how to perform tasks without formal training. Evaluators role-play user actions, answer a set of critical questions about feedback and discovery at each step, and document usability problems.