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.

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Psychology term of the day

May 8th 2024

manoptoscope

n. a hollow cone used for measuring eye dominance. The observer views a small target by placing the base of the cone near the eyes and then viewing the target through the small end of the cone while closing first one eye and then the other. The eye through which the target is actually seen is the dominant eye.