//LG4.5// version = 4.5 infile 'C:\Users\DeCarlo\Documents\My Research\SMP\swets61.dat' model title "Swets, Tanner, Birdsall 1961 data - mixture SDT model"; options bayes categorical=0 variances=0 latent=0 poisson=0 ; standarderrors=standard; output parameters profile bvr; variables dependent resp probit; independent stim; latent delta ordinal 2 score=(0 1); equations delta <- 1; resp <- 1 + delta stim; end model