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One-sided t-tests are commonly used in the neuroimaging field, but two-sided tests should be the default unless a researcher has a strong reason for using a one-sided test. Here we extend our previous work on cluster false positive rates, which used one-sided tests, to two-sided tests. Briefly, we found that parametric methods perform worse for two-sided t-tests, and that nonparametric methods perform equally well for one-sided and two-sided tests.

Original publication

DOI

10.1002/hbm.24465

Type

Other

Publication Date

01/04/2019

Volume

40

Pages

1689 - 1691

Keywords

cluster inference, fMRI, false positives, one-sided, permutation, two-sided