Search results for "Invariance"
showing 9 items of 239 documents
Quantum walks: background geometry and gauge invariance
2019
Ciertos tipos de problemas no pueden resolverse usando los actuales ordenadores clásicos. Una forma de encontrar una solución, es mediante el uso de ordenadores cuánticos. Sin embargo, construir un ordenador cuántico es realmente complicado actualmente, debido a las limitaciones tecnológicas. Mientras tanto, los simuladores cuánticos han sido capaces de resolver algunos de estos problemas, ya que los simuladores cuánticos son más accesibles experimentalmente. Las llamadas caminatas cuánticas, en su versión discreta, son una herramienta muy útil para simular ciertos sistemas físicos. En el límite al continuo, se puede obtener una serie de ecuaciones diferenciales, particularmente, la ecuació…
Evaluating Gender Differences in Problematic Smartphone Use
2022
Abstract. The Smartphone Addiction Inventory (SPAI) is widely used to measure problematic smartphone use (PSU). Although the SPAI has been translated and validated in different countries, its measurement invariance across gender has received little research attention. This study aimed to examine whether men and women interpreted the Italian version of the SPAI (SPAI-I) similarly and, consequently, whether the observed gender differences in SPAI scores, which have been shown in previous studies, could be due to true differences, rather than to differences in measurement. Six hundred nineteen Italian young adults ( Mage = 22.02 ± 2.63; 55.7% women) took part in the study and completed the SP…
Study of social self-concept invariance in physical activity individual and collective practitioners
2019
Este estudio tiene como objetivo explorar la invariancia configural, métrica y escalar en función del sexo y de la práctica de actividad física colectiva del AUSO de Fernández-Zabala et al. (2016) y comparar las puntuaciones obtenidas por los subgrupos. La muestra fue de 278 estudiantes universitarios (M = 21. 16 años; DT = 19. 238) divididos de forma equivalente en función del género y de la práctica de actividad física. Tras comprobar la invariancia estricta en ambos supuestos, los resultados demuestran que no existen diferencias significativas en ninguno de los factores en función del sexo, pero sí en función de la práctica de actividad física: aquellos estudiantes que realizan actividad…
Cross validation of hard-copy and web-based formats of the Sport Imagery Ability Measure
2018
The purpose of this multi-sample study was to examine the psychometric characteristics, factor structure, and measurement invariance of the hard-copy and web-based versions of a measure of sport imagery ability, termed Sport Imagery Ability Measure (SIAM). In the first sample, Spanish athletes (N = 274, 161 men, 113 women, Mage = 21.91, SD = 6.67) completed a hard-copy version of the SIAM. A newly developed web-based version of the SIAM was cross validated in an independent group (N = 266, 147 men, 119 women, Mage = 25.93, SD = 9.84). A small group of participants (n = 16) completed both versions. Exploratory structural equation modelling and confirmatory factor analysis of the data from th…
Anomaly-free scale symmetry and gravity
2023
In this Letter, we address the question of whether the conformal invariance can be considered as a global symmetry of a theory of fundamental interactions. To describe Nature, this theory must contain a mechanism of spontaneous breaking of the scale symmetry. Besides that, the fundamental theory must include gravity, whereas all known extensions of the conformal invariance to the curved space-time suffer from the Weyl anomaly. We show that conformal symmetry can be made free from the quantum anomaly only in the flat space. The presence of gravity would reduce the global symmetry group of the fundamental theory to the scale invariance only. We discuss how the effective Lagrangian respecting …
Maslachin yleisen työuupumuksen arviointimenetelmän (MBI-GS) rakenne ja pysyvyys: pitkittäistutkimus kuntoutusasiakkaiden keskuudessa
2012
Tämän pitkittäistutkimuksen tavoitteena on tarkastella Maslachin yleisen työuupumuksen arviointimenetelmän (MBI-GS) rakennetta ja sen ajallista pysyvyyttä. MBI-GS on kansainvälisesti tunnetuin ja käytetyin työuupumuskysely, mutta sen aikaisempi tutkimus on rajoittunut poikkileikkausasetelmiin sekä työtekijäaineistoihin, joissa työuupumusoireilu on ollut vähäistä. Tämän tutkimuksen aineisto koostuu työntekijöistä, jotka ovat hakeutuneet kuntoutukseen erilaisten työhön liittyvien terveys- ja hyvinvointiongelmien vuoksi. Kuntoutujat täyttivät MBI-GS-työuupumuskyselyn kuntoutukseen tullessa (T1 n = 155) sekä 4 kuukautta tämän jälkeen (T2 n = 140). Tutkimuksen tulokset osoittivat, että MBI-GS- m…
Assessing Statistical Anxiety Among Online and Traditional Students
2019
The purpose of this study was to determine whether scores on the Statistical Anxiety Scale (SAS) manifest in the same way for students in online and traditional statistics courses. Tests of measurement invariance indicated that invariance of the two-factor model of the SAS held at every level. Therefore, we compared the statistical anxiety of online and traditional students. Results indicated that online and traditional statistics students reported comparable levels of anxiety with slightly less anxiety in terms of seeking help for traditional students. We concluded that online instruction is a viable form of statistics education at least for undergraduate students enrolled in the social sc…
The Psychometric properties of the resilience scale (RS-14) in Lithuanian adolescents
2021
In the current study, we provided the evidence of satisfactory validity of the RS-14 scale in the Lithuanian adolescents’ sample (N = 1299; Mage = 14.24; SDage = 1.26), based on its internal structure, and relations to other variables. The results of the study indicated an acceptable model fit for a single-factor structure of the scale with a high internal consistency (McDonald’s omega = 0.89). We also confirmed the scalar measurement invariance across groups of adolescents in terms of their age (i.e., early and middle adolescence) and mental health profile as well as partial scalar gender invariance. Adolescents characterized by high levels of socio-emotional problems reported lower levels…
Cultural Adaptation of the Modified Version of the Conflicts Tactics Scale (M-CTS) in Mexican Adolescents
2019
Several scales are used in Dating Violence studies assuming cross-cultural invariance and equivalence of the measures without making the proper validation in the intended populations. This study focuses on the importance of adapting existing dating violence psychological instruments (as the widely recognized Modified Version of the Conflict Tactics Scale, M-CTS) in diverse adolescent populations adjusting to international validation procedures that ensure the cultural fit of the instrument and the measurement invariance of the construct. We sought to adapt the M-CTS in Mexican adolescents (N = 1861; 57.5% woman) following the ITC Guidelines for Translating and Adapting Test. We made an anal…