languageR: splitplot – R documentation

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splitplot

Simulated data set with split plot design

Description

Simulated lexical decision latencies with priming as treatment and reaction time in lexical decision as dependent variable.

Usage

data(splitplot)

Format

A data frame with 800 observations on the following 11 variables.

items: A factor with levels w1, w2, ..., w40, coding 40 word items.
ritems: The by-word random adjustments to the intercept.
list: A factor with levels listA and listB. The priming effect is counterbalanced for subjects across these two lists, compare table(splitplot$list, splitplot$subjects).
rlist: The by-list random adjustments to the intercept.
priming: A treatment factor with levels primed and unprimed.
fpriming: The priming effect, -30 for the primed and 0 for the unprimed condition.
subjects: A factor with levels s1, s2, ... s20 coding 20 subjects.
rsubject: The by-subject random adjustments to the intercept.
error: The by-observation noise.
int: The intercept.
RT: The reaction time.

Source

R. H. Baayen, D. J. Davidson and D. M. Bates. Mixed-effects modeling with crossed random effects for subjects and items. Manuscript under revision for Journal of Memory and Language.

Examples

## Not run: 
data(splitplot)
table(splitplot$list, splitplot$subjects)
dat=splitplot
require(lme4)
require(optimx)
require(lmerTest)
dat.lmer1 = lmer(RT ~ list*priming+(1+priming|subjects)+(1+list|items),data=dat,
  control=lmerControl(optimizer="optimx",optCtrl=list(method="nlminb")))
dat.lmer2 = lmer(RT ~ list*priming+(1+priming|subjects)+(1|items),data=dat,
  control=lmerControl(optimizer="optimx",optCtrl=list(method="nlminb")))
dat.lmer3 = lmer(RT ~ list*priming+(1|subjects)+(1|items),data=dat,
  control=lmerControl(optimizer="optimx",optCtrl=list(method="nlminb")))
dat.lmer4 = lmer(RT ~ list*priming+(1|subjects),data=dat,
  control=lmerControl(optimizer="optimx",optCtrl=list(method="nlminb")))
anova(dat.lmer1, dat.lmer2, dat.lmer3, dat.lmer4)
summary(dat.lmer3)

## End(Not run)

languageR

Analyzing Linguistic Data: A Practical Introduction to Statistics

v1.5.0

GPL (>= 2)

Authors

R. H. Baayen <harald.baayen@uni-tuebingen.de>, Elnaz Shafaei-Bajestan <elnaz.shafaei-bajestan@uni-tuebingen.de>

Initial release

2019-01-28