Type 1 and Type 2 errors
 

 

Type 1 and Type 2 errors

Essentially, Type 1 errors occur when we fail to believe a truth, while Type 2 errors happen when we believe a falsehood,

or put more formally:

 

n

Type I error:

The error of rejecting the null hypothesis when it is true and accepting the experimental hypothesis when the data do not support that hypothesis.

n

Type II error:

The error of accepting the null hypothesis when it is false and rejecting the experimental hypothesis when the data are supportive of that hypothesis.

 

Type 1 “Hit”: not believing a falsehood.

Type 2 “Hit”: believing a truth.

 

(see also: thinking error)

 

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Labels: Type 1 and Type 2 errors, type 1 error, type two error
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