Kenya Kura

Kenya Kura
Gifu Shotoku Gakuen University · Faculty of Economics and Infomation Science

About

13
Publications
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Introduction

Publications

Publications (13)
Article
Full-text available
The IQ averages of biracial children have long been of interest to intelligence researchers for clarifying the causes of group differences in intelligence. We carried out a search for IQ test results of biracial children fathered by U.S. servicemen after World War 2 and indigenous Asian women in northeast Asian countries (Japan, Korea, China). We w...
Article
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Many groups differ in their mean intelligence score. Spearman’s hypothesis states that the differences are a function of cognitive complexity. There tend to be large differences on subtests of high cognitive complexity and small differences on subtests of low cognitive complexity. Spearman’s hypothesis has been supported by a large number of studie...
Article
Full-text available
Many groups differ in their mean intelligence score. Spearman’s hypothesis states that the differences are a function of cognitive complexity. There tend to be large differences on subtests of high cognitive complexity and small differences on subtests of low cognitive complexity. Spearman’s hypothesis has been supported by a large number of studie...
Article
Full-text available
The OpenPsych journals were set up in 2014 by Emil Kirkegaard and Davide Piffer due to dissatisfaction with existing journals in differential psychology and behavioural genetics. To date, 51 papers have been published in total, encompassing a range of topics from differential psychology and behavioural genetics to socio-political science. However,...
Article
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It is our argument that as Northeast Asian countries are lower on the q index than European countries, yet higher in intelligence, this would assist in explaining the surprisingly poor representation of Northeast Asian countries in terms of original scientific achievement. However, there are a number of alternative explanations that need to be disc...
Article
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The Ainu are an ethnic minority in northern Japan. Their overall IQ was estimated to be somewhat below that of the Japanese (97.2) from the meta-analysis of mostly pre-war Japanese data (N = 975). Moreover, they may have higher cranial capacity than Japanese and their IQ profile is leaning toward non-verbal skills, which suggest a genetic relations...
Article
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Regional differences in IQ are estimated for 47 prefectures of Japan. IQ scores obtained from official achievement tests show a gradient from north to south. Latitudes correlate with height, IQ, and skin color at r = 0.70, 0.44, 0.47, respectively. IQ also correlates with height (0.52), skin color (0.42), income (0.51) after correction, less homici...
Article
The fact that there always exists various kinds of almost continuous mutations for any animal population implies that players in competitions can never be perfectly symmetric in any sense. To develop a model to fit this reality, we consider war of attrition games in which players have continuously different resource holding potential (RHP). The RHP...
Article
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We analyzed general continuous games in which two players compete for a resource with a different value. There is a pure ESS function in which an increase in the resource value increases the cost which players are willing to pay to obtain the resource. We also found that the expected payoff of the player does not change at all, even if the rules o...
Article
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One of the famous neuroscientific studies on economic decision makings on the American Economics Review is Zak et al. (2005), which reported that male (but not female) players who received high distrust signals from opponent players showed higher dehydro-testosterone levels. We measured testosterone levels in this study since dehydro-testosterone i...
Article
Full-text available
The method for the optimum budget allocation to various sciences & technologies fields has not been studied so far much beyond the impressions of specialists. To fill this gap, this paper tries to analyze this subject rigorously. A bisector model appropriately expressed by a 2×2 matrix shows that the long-run optimality is attained by maximizing th...

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