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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