user-centered design

in ergonomics, design practice with a central focus on understanding the characteristics of the target group in order to produce usable products or systems. See also engineering psychology; usability engineering.

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Psychology term of the day

December 23rd 2024

Type II error

the error of failing to reject the null hypothesis when it is in fact not true. Investigators make this error if they conclude that a particular effect or relationship does not exist when in fact it does. The probability of committing a Type II error is called the beta (β) level of a test. Conversely, the probability of not committing a Type II error (i.e., of detecting a genuinely significant difference between samples) is called the power of the test, where power = 1 – β. Also called beta error.