uvsdSim {hbmem}

Function uvsdSim

Description

Simulates data from a hierarchical UVSD model.

Usage

uvsdSim(NN = 2, NS = 1, I = 30, J = 200, K = 6, muN = c(-0.5, 
    -0.2), s2aN = 0.2, s2bN = 0.2, muS = 0.5, s2aS = 0.2, s2bS = 0.2, 
    muS2 = log(1), s2aS2 = 0, s2bS2 = 0,lagEffect = -0.001,
crit = matrix(rep(c(-1.5,-0.5, 0, 0.5, 1.5), each = I), ncol = (K - 1)))

Arguments

NN

Number of conditions for new words.

NS

Number of conditions for studied words.

I

Number of participants.

J

Number of items.

K

Number of response options.

muN

Mean of new-item distribution. If NN is greater than 1, then muN must be a vector of length NN.

s2aN

Variance of participant effects on mean of new-item distribution.

s2bN

Variance of item effects on mean of new-item distribution.

muS

Mean of studied-item distribution. If NS is greater than 1, then muS must be a vector of length NS.

s2aS

Variance of participant effects on mean of studied-item distribution.

s2bS

Variance of item effects on mean of studied-item distribution.

lagEffect

Magnitude of linear lag effect on both studied-item distribution and log(sigma2).

muS2

Mean variance of studied-item distribution, sigma2

s2aS2

Variance of participant effects sigma2.

s2bS2

Variance of item effects on sigma2.

crit

Matrix of criteria (not including -Inf or Inf). Columns correspond to criteria, rows correspond to participants.

Value

The function returns an internally defined "uvsdSim" structure.

Author(s)

Michael S. Pratte

References

See Pratte, Rouder, & Morey (2009)

See Also

hbmem

Examples

library(hbmem)
#Data from hiererchial model
sim=uvsdSim() 
slotNames(sim) 
table(sim@resp,sim@Scond,sim@cond)

#Usefull to make data.frame for passing to model-fitting functions
dat=as.data.frame(cbind(sim@subj,sim@item,sim@cond,sim@Scond,sim@lag,sim@resp))
colnames(dat)=c("sub","item","cond","Scond","lag","resp")

table(dat$resp,dat$Scond,dat$cond)