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Table 1 Results of Latent Class Analysis of Internet Addiction Test and Problematic Use of the Internet Subtypes in the Stellenbosch Sample

From: Problematic use of the Internet is a unidimensional quasi-trait with impulsive and compulsive subtypes

Classes Log Likelihood BIC Entropy LMR p
IAT Total
 1 −32,299.882a 65,192.978    
 2 −29,177.004a 59,547.851 .906 6235.245 <.001
 3 −28,257.598a 58,309.669 .901 1835.959 .746
PUI Subtypes
 1 − 7750.398b 15,887.233    
 2 − 7376.133b 15,531.478 .830 746.628 <.001
 3 − 7236.328c 15,644.641 .761 278.900 .759
  1. Note. LMR Lo-Mendell-Rubin adjusted Likelihood Ratio Test when comparing the k to k – 1 class model; p = probability value for the Lo-Mendell-Rubin (LMR) adjusted Likelihood Ratio Test (LRT). IAT Total N = 1661. PUI Subtypes N = 564. aBest loglikelihood values initially obtained using 160, 32 and then replicated using 320, 64 random starting value perturbations.bBest loglikelihood values initially obtained using 80, 16 and then replicated using 160, 32 random starting value perturbations.cBest loglikelihood value initially required 1280, 256 random starting value perturbations and then replication using 2560, 512 random starts