Post Hoc Tests

Post Hoc Power: Tables and Commentary

Post hoc power is the retrospective power of an observed effect based on the sample size and parameter estimates derived from a given data set. Many scientists recommend using post hoc power as a follow-up analysis, especially if a finding is nonsignificant. This article presents tables of post hoc power for common t and F tests. These tables make it explicitly clear that for a given significan...

Post Hoc Tests

Familywise Error Familywise error (FWE) is also known as alpha inflation or cumulative Type I error. Familywise error represents the probability that any one of a set of comparisons or significance tests is a Type I error. As more tests are conducted, the likelihood that one or more are significant just due to chance (Type I error) increases. One can estimate familywise error with the following...

Evaluating basic approaches to post-hoc analysis for commonly used, gene-based rare variant tests of association

Gender differences in frontal and sagittal plane biomechanics during drop landings.

PURPOSE To determine gender differences in lower-extremity joint kinematics and kinetics between age- and skill-matched recreational athletes. METHODS Inverse dynamic solutions estimated the lower-extremity flexion-extension and varus-valgus kinematics and kinetics for 15 females and 15 males performing a 60-cm drop landing. A mixed model, repeated measures analysis of variance (gender (*) jo...

Post Hoc analysis of cardiopulmonary indicators trends among post-operative coronary artery bypass graft patients with normal ventilator weaning response and dysfunctional ventilator weaning response

Objectives: The objectives of this post hoc analysis was to describe the characteristics of cardiopulmonary indicators among patients with normal ventilator weaning response and dysfunctional ventilator weaning response after coronary artery bypass graft surgery, and to find the differences in characteristics of cardiopulmonary indicators between patients with normal ventilator weaning response...