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Search Results (3)

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Authors = Michael van den Hoek

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4 pages, 187 KiB  
Communication
No Evidence of Ntwetwe Virus Infections in Children Presenting to Kiboga Hospital, Uganda
by Arthur W. D. Edridge, Nathalie van den Brekel, Philly Mukungu, Rachael Nakayima, Samuel Bbosa, Peter Isagara, Michael van Boele Hensbroek, Lia van der Hoek, John Kayiwa, Julius J. Lutwama and Richard Idro
Trop. Med. Infect. Dis. 2023, 8(1), 21; https://doi.org/10.3390/tropicalmed8010021 - 27 Dec 2022
Cited by 1 | Viewed by 2159
Abstract
We investigated whether Ntwetwe virus—a novel orthobunyavirus discovered in a Ugandan girl with a fatal encephalopathy—was a common reason for hospital admission for children to Kiboga hospital, Uganda. A case–control was conducted between September 2019 and September 2020, including cases with severe neurological [...] Read more.
We investigated whether Ntwetwe virus—a novel orthobunyavirus discovered in a Ugandan girl with a fatal encephalopathy—was a common reason for hospital admission for children to Kiboga hospital, Uganda. A case–control was conducted between September 2019 and September 2020, including cases with severe neurological disease and mild febrile illness, matched to a healthy control without fever. Among 143 subjects, no cases with an acute infection were identified. This result suggests that Ntwetwe virus does not cause a major burden of disease amongst children presenting to Kiboga hospital during the study period. Full article
(This article belongs to the Section Infectious Diseases)
22 pages, 830 KiB  
Review
A Meta-Analysis of Spearman’s Hypothesis Tested on Latin-American Hispanics, Including a New Way to Correct for Imperfectly Measuring the Construct of g
by Jan te Nijenhuis, Michael van den Hoek and Joep Dragt
Psych 2019, 1(1), 101-122; https://doi.org/10.3390/psych1010008 - 18 Apr 2019
Cited by 4 | Viewed by 4560
Abstract
Spearman’s hypothesis states that the difference in intelligence between groups is a function of the g loadings of the subtests, where larger differences are found on tests with higher g loadings. This finding has consistently been supported on various groups. In this study [...] Read more.
Spearman’s hypothesis states that the difference in intelligence between groups is a function of the g loadings of the subtests, where larger differences are found on tests with higher g loadings. This finding has consistently been supported on various groups. In this study we look at samples of Latin-American Hispanics in comparison to Whites. We carried out a meta-analysis based on 14 data points and a total of 16,813 Latin-American Hispanics, including a new way to correct for imperfectly measuring the construct of g. Spearman’s hypothesis was strongly supported with a mean r of 0.63. After correction for various statistical artifacts this value became rho = 0.91. Therefore, we conclude that Spearman’s hypothesis also holds true for White/Latin-American Hispanic differences. Full article
(This article belongs to the Special Issue Beyond Thirty Years of Research on Race Differences in Cognitive Ability)
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11 pages, 272 KiB  
Article
Spearman’s Hypothesis Tested on Black Adults: A Meta-Analysis
by Jan Te Nijenhuis and Michael Van den Hoek
J. Intell. 2016, 4(2), 6; https://doi.org/10.3390/jintelligence4020006 - 1 Jun 2016
Cited by 14 | Viewed by 10622
Abstract
Blacks generally score significantly lower on intelligence tests than Whites. Spearman’s hypothesis predicts that there will be large Black/White differences on subtests of high cognitive complexity, and smaller Black/White differences on subtests of lower cognitive complexity. Spearman’s hypothesis tested on samples of Blacks [...] Read more.
Blacks generally score significantly lower on intelligence tests than Whites. Spearman’s hypothesis predicts that there will be large Black/White differences on subtests of high cognitive complexity, and smaller Black/White differences on subtests of lower cognitive complexity. Spearman’s hypothesis tested on samples of Blacks and Whites has consistently been confirmed in many studies on children and adolescents, but there are many fewer studies on adults. We carried out a meta-analysis where we collected the existing tests of Spearman’s hypothesis on adults and collected additional datasets on Black and White adults that could be used to test Spearman’s hypothesis. Our meta-analytical search resulted in a total of 10 studies with a total of 15 datapoints, with participants numbering 251,085 Whites and 22,326 Blacks in total. For all these data points, the correlation between the loadings of a general factor that is manifested in individual differences on all mental tests, regardless of content (g) and standardized group differences was computed. The analysis of all 15 data points yields a mean vector correlation of 0.57. Spearman’s hypothesis is confirmed comparing Black and White adults. The differences between Black and White adults are strongly in line with those previously found for children and adults; however, because of lack of access to the original data, we could not test for measurement invariance. Full article
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