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- Author or Editor: M. Hanna x
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Abstract
The protein content of various corn-meals /rice, lupine, sorghum, pumpkin, linseed, water melon, tomato/ collected from Egypt and the USA have been determined by 14 MeV neutron activation analysis via14N/n, 2n/13N reaction. Non-conventional sources like tea and coffee residues were also investigated. The concentrations of trace elements determined by the X-ray fluorescence technique show definite differences even for a given type of seed produced in different geographical regions.
This contribution is based on an extensive literature review of student dropout in Europe, which was carried out by a research group of the Danish Clearinghouse for Education in cooperation with an international expert group in 2012/2013. The review served to answer three basic questions: What is dropout? Why does it occur? What can be done to reduce or prevent it? Only empirical studies were included in the review and altogether 44 studies were included. The article points out that student dropout is a more complex and multidimensional issue than most people think and that it is important to distinguish between formal dropout (i.e., leaving university studies altogether before degree completion) and transfer (i.e., changing subject and/or institution). The review summarizes and discusses the main results of the 44 studies included in terms of nine dimensions: (a) study conditions at university, (b) academic integration at university, (c) social integration at university, (d) personal efforts and motivations for studying, (e) information and admission requirements, (f) prior academic achievement in school, (g) personal characteristics of the student, (h) sociodemographic background of the student, and (i) external conditions. The conclusions provide an answer to the three questions posed above and include recommendations for further research, university leadership, and policymakers.
Abstract
Background and aims
The present systematic review and meta-analysis aimed to synthesize the available literature on the relationship between gaming motivations and gaming disorder symptoms. Specifically, to (1) explore what gaming motivation questionnaires and classifications are used in studies on gaming disorder symptoms and (2) investigate the relationship between motivational factors and symptoms of gaming disorder.
Method
An electronic database search was conducted via EBSCO (MEDLINE and PsycINFO) and the Web of Science Core Collection. All studies using validated measurements on gaming disorder symptoms and gaming motivations and available correlation coefficients of the relationship between gaming disorder and gaming motivations were included. The meta-analyses were conducted using a random-effects model.
Results
In total, 49 studies (k = 58 independent sub-samples), including 51,440 participants, out of which 46 studies (k = 55 sub-samples, n = 49,192 participants) provided data for the meta-analysis. The synthesis identified fourteen different gaming motivation instruments, seven unique motivation models, and 26 motivational factors. The meta-analysis showed statistically significant associations between gaming disorder symptoms and 23 out of 26 motivational factors, with the majority of the pooled mean effect sizes ranging from small to moderate. Moreover, large heterogeneity was observed, and the calculated prediction intervals indicated substantial variation in effects across populations and settings. Motivations related to emotional escape were robustly associated with gaming disorder symptoms.
Discussion and conclusions
The present meta-analysis reinforces the importance of motivational factors in understanding problematic gaming behavior. The analysis showed significant heterogeneity in most outcomes, warranting further investigation.
Registration detail
PROSPERO (CRD42020220050).
