Abstract

ESCURRA MAYAUTE, Miguel  and  SALAS BLAS, Edwin. Construction and validation of the questionnairy of social networking addiction (SNA). liber. [online]. 2014, vol.20, n.1, pp.73-91. ISSN 1729-4827.

The purpose of this study was to design, construct, and validate The Social Network Addiction Questionnaire (SNA) by applying the Item Response Theory (ITR) for polyatomic graded response items. At first, items were designed according to the DSM-IV criteria for substance addiction and adapted to the construct under study that was evaluated in its content validity by the judges’ criterion. The initial version of 31 items was applied to 380 college students from different universities in the city of Lima. The latent structure of the items was analyzed using an exploratory factor analysis on the polychoric correlation matrix between all items. Results showed a factor structure of three dimensions that were analyzed independently. Parameter estimation of the models was conducted using the marginal maximum likelihood method. Based on the results, eight items were excluded due to its low item-total correlation. The localization parameters were between medium and high levels of the scale. The discrimination parameters adopted moderate and high values. The items information functions showed that the dimensions are more precise to discriminate individuals with medium and high levels of the evaluated trait. Results also showed adequate psychometric properties of validity and reliability of the scale and its components.

Keywords : Network addiction; graded response model; Samejima’s model; item response theory.

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