poLCA (version 1.2)

gss82: 1982 General Social Survey (sample data)

Description

Attitudes towards survey taking across two dichotomous and two trichotomous items among 1202 white respondents to the 1982 General Social Survey. Respondents give their opinion of the purpose of surveys (PURPOSE; good/depends/waste of time and money), the accuracy of surveys (ACCURACY; mostly true/not true), their understanding of survey questions (UNDERSTA; good/fair, poor), and how well they cooperated with the interviewer (COOPERAT; interested/cooperative/impatient, hostile). This data set appears in McCutcheon (1987, p. 30) as Table 3.1.

Usage

data(gss82)

format

A data frame with 1202 observations on 4 survey variables.

source

McCutcheon, A.L. 1987. Latent class analysis. Newbury Park: SAGE Publications.

Examples

data(gss82)
f <- cbind(PURPOSE,ACCURACY,UNDERSTA,COOPERAT)~1
gss.lc2 <- poLCA(f,gss82,nclass=2)               # log-likelihood = -2783.268
gss.lc3 <- poLCA(f,gss82,nclass=3,maxiter=3000,nrep=10)  # log-likelihood = -2754.545
gss.lc4 <- poLCA(f,gss82,nclass=4,maxiter=15000,nrep=10,tol=1e-7) # log-likelihood = -2746.621