The aim of this study was to translate into Polish and establish the psychometric properties of the 11-item De Jong Gierveld Loneliness Scale (DJGLS). The translation process followed the recent guidelines for the crosscultural adaptation of questionnaires and was tested through analysis of differential item functioning (DIF) by the use of the Poly-SIBTEST method and bilingual groups. The essential unidimensionality was checked by bifactor analysis. Reliability was assessed by internal consistency and homogeneity analysis, and external construct validity by correlation with several external scales. The research indicated no differences in item performance between the final Polish and English versions, and confirmed the earlier findings indicating that the DJGLS measures two dimensions of loneliness (social and emotional) which generalize into a higher-order factor of a general sense of loneliness (bifactor structure). Reliability (α = .89) and homogeneity (H = .47) proved to be high. Research showed that the instrument has a satisfactory validity criterion: Correlation with the UCLA Loneliness Scale r = .82; with Rosenberg’s Self-Esteem Scale r = –.56; and with the Beck Depression Inventory r = .46 (all p < .01). The Polish adaptation of the DJGLS thus presents a bifactor structure, with good levels of internal consistency, homogeneity, and construct validity.
The present investigation is the first examination of the factor structures, reliability, external validity, longitudinal invariance, and stability of the De Jong Gierveld Loneliness Scale (DJGLS), as used with early adolescents. It is based on a two-wave, large, representative sample of Polish primary school pupils. The results demonstrate that the model most reflective of the factor structure of the DJGLS is the bifactor model, which assumes the occurrence of one, highly reliable, general factor (overall sense of loneliness) and two, relatively irrelevant, subfactors. Essential unidimensionality (the general factor accounting for three fourth of the common variance) suggest that the interpretation of the subfactors over and above the general factor is inappropriate. The longitudinal confirmatory factor analysis indicated that the bifactor structure of the DJGLS is invariant over time. Correlations with self-rated loneliness, sociometric acceptance/rejection, social self-efficacy, identification with class group, family structure, and gender provide support for the validity of the DJGLS. This implies that it could be used as a measure of loneliness in adolescence, which does not involve references to the school context, making it possible to conduct studies that go beyond school period and compare the intensity of the feeling of loneliness in that group with other age groups.
Children diagnosed with ADHD are more often rejected by their peers and have a more pessimistic view of their social world. Moreover, ADHD diagnosis does not have a direct influence on the perceived quality of social relations otherwise than through sociometric status.
The possibilities offered by the use of the Internet increasingly intensify the problem of Internet addiction, which has become more prevalent in the last decade, marked by the growing availability of mobile devices and new media and their exacerbation of the problem. Research on Internet addiction, initiated by Kimberly Young at the end of the twentieth century, usually appears in the literature in the context of young people who have been found to be most vulnerable. The phenomenon is known as Adolescent Internet Addiction. Compulsive use of the Internet is a complex phenomenon, its effects being visible in almost all aspects of a young person’s social life. It is manifested in a variety of pathological behaviors and emotional states grouped into several major psycho-physical and social effects that may appear simultaneously, e.g. anger, depression, loneliness or anxiety associated with the lack of access to the network, the weakening of social ties, withdrawal from real life, lack of educational achievement, chronic fatigue or deteriorating health. The authors of this study aim to assess the level of Internet addiction among adolescents in Poland and indicate its main behavioral manifestations, in the students surveyed, which influence their pathological use of the Internet. Our study involved a total of 505 students from three high schools located in Rzeszow (N = 505) and was carried out by questionnaires, including, among others, The Problematic Use of the Internet (PUI) which is the Polish adaptation of Kimberly Young’s Internet Addiction Test (IAT) (Cronbach’s α = 0.89). Statistical analysis of responses from the PUI test allowed us to determine (1) the level of Internet addiction among these adolescents, whereas the univariate (ANOVA) analysis enabled us (2) to verify the hypothesis of the existence of differences in the level of Internet addiction among the investigated groups as far as gender, place of residence or grade are concerned. Generally, the results obtained in our research indicate that the level of Internet addiction among the adolescents investigated is not very high, although two thirds of our respondents showed an above average level of addiction, and every ninth respondent (approximately 11%) was highly addicted to the Internet, men being more often addicted (15.6%) than women (8.3%).
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