R version 2.9.0 (2009-04-17) Copyright (C) 2009 The R Foundation for Statistical Computing ISBN 3-900051-07-0 R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()' for distribution details. R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for an HTML browser interface to help. Type 'q()' to quit R. > x <- array(list(2,1,2,3,4,2,3,3,3,2,1,2,4,4,2,2,2,2,2,2,4,2,3,3,3,2,2,2,3,3,2,2,3,3,3,3,2,2,2,2,1,1,4,3,3,2,2,2,3,3,3,3,4,3,3,2,3,3,2,2,2,2,4,3,4,3,2,2,2,2,3,3,3,3,3,2,3,3,4,3,3,3,1,2,2,1,2,2,3,3,4,3,3,2,2,2,2,3,3,3,3,3,4,2,3,2,2,2,2,3,2,3,2,2,3,3,1,1,5,3,2,1,3,3,4,2,4,2,2,3,3,2,3,3,3,2,3,3,1,1,3,2,3,2,3,2,4,2,3,3,4,2,3,2,3,2,2,2,1,1,2,2,3,3,3,3,2,3,2,1,3,3,2,2,3,2,4,4,2,2,3,3,3,3,4,3,3,3,2,3,2,2,3,3,2,1,3,2,3,3,4,3,4,3,3,3,1,2,1,1,4,4,2,1,4,4,2,1,2,2,3,2,4,3,3,3,3,3,4,3,2,4,3,3,3,3,3,3,2,2,2,2,2,3,2,2,4,2,3,3,2,3,4,4,3,3,2,3,1,3,4,4,3,3,2,2,2,4,3,3,2,2,3,3,2,1,3,3,3,2,2,2,3,3,2,2,2,2,2,2,3,3,2,3,3,3,3,3,4,4,4,3,4,3,2,2,3,3,3,3,1,1),dim=c(2,156),dimnames=list(c('Q1_7','Q1_8'),1:156)) > y <- array(NA,dim=c(2,156),dimnames=list(c('Q1_7','Q1_8'),1:156)) > for (i in 1:dim(x)[1]) + { + for (j in 1:dim(x)[2]) + { + y[i,j] <- as.numeric(x[i,j]) + } + } > #'GNU S' R Code compiled by R2WASP v. 1.0.44 () > #Author: Dr. Ian E. Holliday > #To cite this work: Ian E. Holliday, 2009, YOUR SOFTWARE TITLE (vNUMBER) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_YOURPAGE.wasp/ > #Source of accompanying publication: > #Technical description: > library(psych) > z <- t(y) > (r <- alpha(z)) Reliability analysis Call: alpha(x = z) raw_alpha std.alpha G6(smc) average_r mean sd 0.7 0.7 0.54 0.54 2.6 0.7 Reliability if an item is dropped: raw_alpha std.alpha G6(smc) average_r Q1_7 0.54 0.54 0.29 0.54 Q1_8 0.54 0.54 0.29 0.54 Item statistics n r r.cor r.drop mean sd Q1_7 156 0.88 0.64 0.54 2.7 0.85 Q1_8 156 0.88 0.64 0.54 2.5 0.74 Non missing response frequency for each item 1 2 3 4 5 miss Q1_7 0.06 0.34 0.41 0.18 0.01 0 Q1_8 0.09 0.39 0.46 0.06 0.00 0 > > #Note: the /var/www/html/rcomp/createtable file can be downloaded at http://www.wessa.net/cretab > load(file="/var/www/html/rcomp/createtable") > > a<-table.start() > a<-table.row.start(a) > a<-table.element(a,'Cronbach Alpha and Related Statistics',5,TRUE) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,'Items',1,TRUE) > a<-table.element(a,'Cronbach Alpha',1,TRUE) > a<-table.element(a,'Std. Alpha',1,TRUE) > a<-table.element(a,'G6(smc)',1,TRUE) > a<-table.element(a,'Average R',1,TRUE) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,'All itmes',header=TRUE) > a<-table.element(a,round(r$total['raw_alpha'],4)) > a<-table.element(a,round(r$total['std.alpha'],4)) > a<-table.element(a,round(r$total['G6(smc)'],4)) > a<-table.element(a,round(r$total['average_r'],4)) > a<-table.row.end(a) > n = length(z[1,]) > for (i in 1:n) { + a<-table.row.start(a) + a<-table.element(a,paste(colnames(z)[i],' excluded',sep=''),header=TRUE) + a<-table.element(a,round(r$alpha.drop[i,'raw_alpha'],4)) + a<-table.element(a,round(r$alpha.drop[i,'std.alpha'],4)) + a<-table.element(a,round(r$alpha.drop[i,'G6(smc)'],4)) + a<-table.element(a,round(r$alpha.drop[i,'average_r'],4)) + a<-table.row.end(a) + } > a<-table.end(a) > table.save(a,file="/var/www/html/rcomp/tmp/101pj1289856571.tab") > > > proc.time() user system elapsed 0.231 0.034 0.263