Spearman's hypothesis tested comparing Sudanese children and adolescents with various other groups of children and adolescents on the items of the Standard Progressive Matrices

Nijenhuis, Jan te; Bakhiet, Salaheldin Farah Attallah; Hoek, Michael van den; Repko, Jasper; Allik, Jueri; Žebec, Mislav Stjepan; Sukhanovskiy, Vladimir; Abduljabbar, Adel S.

doi:10.1016/j.intell.2016.02.010

Cited by 12 publications

(18 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Jensen invited Jan te Nijenhuis to develop what is now called the psychometric meta-analytical-MCV hybrid model, or PMA-MCV hybrid model for short. In the first application of this hybrid model (te Nijenhuis et al, 2007) in a meta-analysis of test-retest effects corrections for five artefacts were carried out: sampling error, reliability of the g vector, reliability of the d vector, range restriction in g loadings and imperfectly measuring the construct of g. In later applications of the PMA-MCV hybrid model the corrections were improved (see: te Nijenhuis & van der Flier, 2013;te Nijenhuis et al, 2014b;te Nijenhuis et al, 2015c;te Nijenhuis et al, 2016ate Nijenhuis et al, , 2016c.…”

Section: The Nomological Net Of MCV Study Outcomes Yields Three Clustersmentioning

confidence: 99%

Spearman’s hypothesis tested comparing Korean young adults with various other groups of young adults on the items of the Advanced Progressive Matrices

et al. 2019

Self Cite

View full text Add to dashboard Cite

Spearman’s hypothesis tested at the subtest level of an IQ battery states that differences between races on the subtests of an IQ battery are a function of the g loadings of these subtests, such that there are small differences between races on subtests with low g loadings and large differences between races on subtests with high g loadings. Jensen (1998) stated that Spearman’s hypothesis is a law-like phenomenon. It has also been confirmed many times at the level of items of the Raven’s Progressive Matrices. This study hypothesizes that with concern to Spearman’s hypothesis, subtests and items function in fundamentally the same way, and tested whether Spearman’s hypothesis is confirmed at the item level for White–East Asian comparisons. A group of Korean young adults (N=205) was compared with other groups of young adults from Canada, the US, Russia, Peru and South Africa (total N=4770) who took the Advanced Progressive Matrices. Spearman’s hypothesis was strongly confirmed with a sample-size-weighted r with a value of 0.63. Computing the g loadings of the items of the Raven with either the Raven-g or the Wechsler-g led to the same conclusions. Tests of Spearman’s hypothesis yielded less-strong outcomes when the 36-item Advanced Progressive Matrices were used than when the 60-item Standard Progressive Matrices were used. There is a substantial correlation between sample size and the outcome of Spearman’s hypothesis. So, all four hypotheses were confirmed, showing that a part of the subtest-level nomological net replicates at the item level, strengthening the position that, with concern to Spearman’s hypothesis, subtests and items function fundamentally the same. It is concluded that Spearman’s hypothesis is still a law-like phenomenon. Detailed suggestions for follow-up research are made.

show abstract

Section: The Nomological Net Of MCV Study Outcomes Yields Three Clustersmentioning

confidence: 99%

Spearman’s hypothesis tested comparing Korean young adults with various other groups of young adults on the items of the Advanced Progressive Matrices

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Spearman coefficient is usually used to quantify how well two columns of data monotonically depend on each other, meaning the coefficient determines the degree to which each of the variables is correlated with the factor that is common to all variables in the analysis [63,64], i.e., the correlation study indicates the relationship between two monotonic variables. The resultant values will always be between +1 and −1.…”

Section: Discussionmentioning

confidence: 99%

Investment Uncertainty Analysis in Eucalyptus Bole Biomass Production in Brazil

Simões

Dinardi

Silva

2018

Forests

View full text Add to dashboard Cite

Forestry investment projects for the biomass production of the eucalyptus bole can be characterized by uncertain environments, which result in economic risk to the forest producer, however that can be measured by applying probabilistic techniques. This was our motivation and justification for analyzing the economic-financial viability of different silvicultural practices for eucalyptus bole biomass production under conditions of uncertainties, running Monte Carlo method for risk management. The experiment was carried out in the state of São Paulo, Brazil, using 5 treatments with spacings of 3 m × 2 m; 3 m × 1 m; 1.5 m × 2 m; 3 m × 0.5 m; and 1.5 m × 1.0 m, i.e., different spacings between planting lines and plants. These treatments were characterized as investment projects. To develop stochastic models, we relied on technical-economic deterministic variables. We evaluated the investment projects based on the cash flows under conditions of uncertainty, discounted at the attractiveness rate calculated by capital asset pricing model. With the results of these economic flows, the net present value, the modified internal rate of return and the profitability index values were estimated, commonly used in the analysis of investments in projects. The results showed that based on economic metrics, the three-year rotation cycle for forest stands for biomass production of the main bole of eucalyptus, with a spacing of three meters between rows and two meters between plants, had an 83% probability of economic success. The sensitivity analysis showed that the bole biomass of eucalyptus is the most important variable for determining the economic-financial feasibility of the investment project.

show abstract

“…More recently, a White Spanish sample was compared with a sample of Moroccans but did not report a clear confirmation of Spearman's hypothesis [16]. Most recently, a number of studies by te Nijenhuis and co-authors, using a large number of datasets, generally showed clear and often strong confirmations of Spearman's hypothesis at the item level [3,[17][18][19].…”

Section: Introductionmentioning

confidence: 97%

Spearman’s Hypothesis Tested on Black Adults: A Meta-Analysis

Nijenhuis

Hoek

2016

J. Intell.

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Spearman's hypothesis tested comparing Sudanese children and adolescents with various other groups of children and adolescents on the items of the Standard Progressive Matrices

Cited by 12 publications

References 83 publications

Spearman’s hypothesis tested comparing Korean young adults with various other groups of young adults on the items of the Advanced Progressive Matrices

Spearman’s hypothesis tested comparing Korean young adults with various other groups of young adults on the items of the Advanced Progressive Matrices

Investment Uncertainty Analysis in Eucalyptus Bole Biomass Production in Brazil

Spearman’s Hypothesis Tested on Black Adults: A Meta-Analysis

Contact Info

Product

Resources

About