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Latentná analýza tried : škála rizikového správania žiaka

100%

Hulin M., Kanovský M., Kurečko M.

Československá psychologie (Czechoslovak Psychology)

2020

vol. 64

issue 2

143-154

Objectives. Aim of the study was the analysis of latent classes of student school risk behavior and to provide usefull interpretation of raw scores as well as identifying relevant predictors of latent classes. To this aim a detailed psychometric analysis of the scale using IRT approach was also used. Sample and setting. The reasearch sample included 2927 pupils from 205 elementary schools, 1441 were boys (49.2%) and 1486 were girls (50.8%). Age ranged from 7 to 15 years, M=11.26 (SD=2.55). It was a representative national sample (proportional random sample) of elementary school students from Slovakia. Statistical analyses. To assess unidimensionality, local independence and monotone homogeneity, a non-parametric Mokken scale analysis was used. An IRT confirmatory factor analysis was conducted to assess the fit of the model. An IRT latent class analyses followed to identify the model with the best fit to data. Results. Based on psychometric analysis of the scale a shortened version (from 46 items to 31 items) proved useful, and showed very good reliability. scalability, strong single factor and unidimensionality. After conducting a latent class analysis, the authors were able to identify 4 latent classes of students assessed with risk school behavior by their teachers, where age and gender were identified as significant predictors of latent class membership. The authors also provide practical guidelines for interpreting raw scores. Study limitation. It will be usefull in the future to confirm the characteristics of the shortened scale of students’ school risk behavior on a new sample, and to perform an external validation of the scale.

Ciele. Štúdia sa zaoberala analýzou latentných tried rizikového správania žiaka v škole s cieľom poskytnúť praktickú interpretáciu hrubých skóre ako aj identifikovať relevantné prediktory členstva v latentných skupinách. Za týmto účelom bola realizovaná psychometrická analýza škály s využitím IRT. Výskumný súbor. Vzorku tvorilo 2 927 žiakov z 205 škôl. Z toho bolo 1 441 chlapcov (49,2 %) a 1 486 dievčat (50,8 %). Vekový rozsah bol od 7 do 15 rokov, M = 11,26 (SD = 2,55). Jedná sa o reprezentatívnu vzorku (náhodný proporčný výber) žiakov základných škôl SR. Štatistická analýza. Autori overovali konfirmačne jednodimenzionálnu faktorovú štruktúru revidovanej škály. Na overenie jednodimenzionality, lokálnej nezávislosti a monotónnej homogenity bola použitá neparametrická IRT Mokkenova analýza. Po týchto analýzach bola realizovaná IRT analýza latentných tried a identifikovaný najvhodnejší model. Výsledky. Na základe psychometrickej analýzy sa ukázalo vhodné skrátiť pôvodnú 46-položkovú škálu na 31-položkovú, ktorá má veľmi dobrú reliabilitu, škálovateľnosť, silný spoločný faktor a jednodimenzionalitu. Následne boli analýzou latentných tried identifikované 4 latentné skupiny, pričom rod a čiastočne aj vek sa ukazujú relevantnými prediktormi členstva v týchto skupinách. Autori ponúkajú aj praktické odporúčanie a varovanie pre interpretovanie hrubých skóre na kategorizáciu žiakov. Obmedzenia štúdie. Bude vhodné do budúcna nezávisle overiť charakteristiky skrátenej škály rizikového správania žiaka na novej vzorke, a bolo by potrebné škálu externe validizovať, keďže ide o hodnotenia učiteľov.

Psychometrické zhodnotenie Mokkenového modelu pre Škálu na úlohu zameraných obáv

88%

Marko M.

Psychologie a její kontexty

2016

vol. 7

issue 1

125–134

Task-related worries can be understood as an inherent component of an anxious state and stress response. Under evaluating conditions (e.g. cognitive testing), these worries, due to cognitive interference they create, may have undesirable effects on a cognitive performance at hand. Since cognitive interference has been documented to affect a broad spectrum of cognitive performance (Hembree, 1988), development of a method for its assessment is required. For this purpose we modified a part of the original Cognitive Interference Questionnaire (Sarason et al., 1986) in order to create the revised Task- Related Worry Scale (TRWS-R) and investigated its psychometric properties. Data from two hundreds of participants (72 male, 139 female; age ranging from 18 to 24) were obtained to inspect the modified scale’s properties on Slovak sample. After the scale was reformulated and shortened, the resulting set of eight items was subjected for examination of internal consistency (Cronbach'salpha, Revelle’sbeta, Armor'stheta, and McDonald'somega coefficients), expected unidimensionality (confirmatory factor analysis), and scalability (nonparametric item response model - Mokken scale analysis). The results indicate that the scale has rather reasonable consistency. Both mean inter-item correlation and corrected mean item-score correlation were relatively high (r= .469 and r = .636 respectively). Additionally, all estimated consistency coefficients reached required thresholds (namely: ? = .88,ß = .79,? = .86,? =.88). Robust confirmatory factor analysis and Cronbach-Mesbah curve convergently supported the hypothesized unidimensional factor solution (CFA fit indexes: ?2 (28)= 26.73, p = .143, CFI = .994, TLI = .992, RMSEA = .041, SRMR = .055.). Moreover, Mokken scale analysis indicated that the scale is scalable (scale’s H = .496) and satisfies the criteria of both monotone homogenity model and double monotonicity model (no significant violations were present). Consistency indices, confirmatory factor analysis, and Mokken scale analysis consistently suggest that the scale assesses a unidimensional construct with reasonable reliability.They also indicated that broader scope of worries that may be present under evaluating conditions (mapped by eight items) tend to occur simultaneously, plausibly without any finergrained structure. The nonparametric item response model suggested that the items allow ranking persons in the same order on the latent continuum and that the ordering of the items according to their difficulty is relatively uniform across ability groups. Further research is however needed for evaluating the scale's validity and for supporting its appropriateness on more general sample. Psychometric analyses of the present study provided reasonable evidence that support acceptable properties of the revised Task- Related Worry Scale (TRWS-R). We thus conclude that TRWS-R represents a suitable instrument

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1 Kurečko M.

1 Marko M.

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Latentná analýza tried : škála rizikového správania žiaka

Psychometrické zhodnotenie Mokkenového modelu pre Škálu na úlohu zameraných obáv