aovSphericityAdjustment {psychReport}

aovSphericityAdjustment

Description

Adjust ezANOVA table with corrections for sphericity (Greenhouse-Geisser or Huynh-Feldt). Called by default within aovTable

Usage

aovSphericityAdjustment(aovObj, type = "GG", adjDF = TRUE)

Arguments

aovObj

The returned object from a call to ezANOVA

type

"GG" (Greenhouse-Geisser) or "HF" (Huynh-Feldt)

adjDF

TRUE/FALSE Should DF's be adjusted?

Value

list

Examples

# Example 1:
# create dataframe with 3(Comp: neutral vs. comp vs. incomp) factors/levels
dat <- createDF(nVP = 20, nTrl = 1,
                design = list("Comp" = c("neutral", "comp", "incomp")))

dat <- addDataDF(dat,
                 RT = list("Comp neutral" = c(510, 150, 100),
                           "Comp comp"    = c(500, 150, 100),
                           "Comp incomp"  = c(520, 150, 100)))

# using ezANOVA
library(ez)
aovRT <- ezANOVA(dat, dv=.(RT), wid = .(VP), within = .(Comp),
                 return_aov = TRUE, detailed = TRUE)
aovDispTable(aovRT)
aovRT <- aovSphericityAdjustment(aovRT)
aovDispTable(aovRT)