Test Means Interaction

Provides the statistical significance tests for the simple effects and the interaction contrast in a 2x2 design.

Usage

# S3 method for data.frame
testMeansInteraction(frame, ...)

# S3 method for formula
testMeansInteraction(formula, ...)

# S3 method for bsm
testMeansInteraction(moments, ...)

# S3 method for wsm
testMeansInteraction(moments, corrs, conf.level=.95, ...)

Arguments

frame

a set of (non-empty) numeric vectors of data values

formula

a formula of the form lhs ~ rhs where lhs is a numeric variable giving the data values and rhs a factor giving the corresponding groups

moments

a list of matrices/frames of descriptive/summary statistics

corrs

a list of matrices/frames of correlations

by

a factor used for blocking

Value

The returned frame contains the following components:

Est

the contrast for the simple effects and the interaction

SE

the standard errors for the simple effects and the interaction

df

the degrees of freedom for the simple effects and the interaction

t

the t value for the simple effects and the interaction

p

the p value for the simple effects and the interaction