High Magnetic Fields

Eaves, Lucile; Hudson, Peter

doi:10.1088/0031-9112/30/12/030

Cited by 3 publications

(3 citation statements)

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“…Nevertheless, in deference to the above, the calculations were tried out with a range of assumed values somewhat lower, namely at 0; +0.10 and +0.25. These have turned out well in covering the required range, and our position is supported by Eaves' (1973) finding that assortive mating is essential to good fit in the case of intelligence inheritance data.…”

Section: Bases Of the Statistical Analysis: The Oses And Thesupporting

confidence: 55%

THE HERITABILITY OF FLUID, g_f, AND CRYSTALLISED, g_c, INTELLIGENCE, ESTIMATED BY A LEAST SQUARES USE OF THE MAVA METHOD

Cattell

1980

Brit J of Edu Psychol

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The heritability of the two second order general intelligence factors g , and g,, was studied by the MAVA design, employing 470 brothers reared together, 94 identical twins reared together, 124 fraternal twins reared together, and 1,543 boys (fluid intelligence) and 2,579 (crystallised intelligence) unrelated. All were in the 12-18 age range.The model and the empirical data on four constellations give seven simultaneous equations for predicting expected values of the concrete, empirical variances from seven abstract, unknown variances and correlations. The best fit was obtained, using a least squares solution by computer program, CAMALS, and evaluated by a Q statistic analogous to chi-square. Two models offering reduced, parsimonious modifications of the full MAVA, were also tried but MAVA gave the highest index of good fit.Substantial differences exist between the heritability of g , and g,, alike in the present and in earlier MAVA studies, using differing methods of solution. H for crystallised intelligence is highest for within family variance and the mean value stands at only 0.45 for the general population-lower still by the present method. Fluid intelligence, on the other hand, has the highest heritability between families, reaching a mean of 0.92. Its general population value is 0.58 closely approaching the 0.60 which has tended to be the lower end of the range by the twin method. (The reason for the usual higher twin method values is exposed by the finding of higher sib than twin within family threptic variance.) Some support is found for a negative genothreptic correlation between families, fitting the socio-psychological law of environmental coercion toward the mean.

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Section: Bases Of the Statistical Analysis: The Oses And Thesupporting

confidence: 55%

THE HERITABILITY OF FLUID, g_f, AND CRYSTALLISED, g_c, INTELLIGENCE, ESTIMATED BY A LEAST SQUARES USE OF THE MAVA METHOD

Cattell

1980

Brit J of Edu Psychol

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“…Note that dn/dt is the product of two exponential factors. One is derived from the quasi-equilibrium population of the excited state, and is explicitly displayed in equation 10. The other factor is contained in a = a. exp -Eb/kT and derives from the barrier, Fb, for a multiphonon transition to the DX state.…”

Section: E-)/kt] (11)mentioning

confidence: 99%

“…[2] H however, recent hydrostatic pressure studies, [6][7][8] especially when combined with inf'rared vibrational spectroscopy, [9,10] strongly suggest that D)X is just the simple substittitonal donor. The idea that the simple donor can participate in a large lattice relaxation hlas heen difficult to accept, prompting repeated attempts to explain the D)X level as either an iintisially deep hydrogenic state, [l1-14] or as a deep state [15][16][17][18] of the type proposed by lljalmarson et al [l] With only small lattice relaxation of the donor, all of these models lack a physical mechanism which can explain the immeasurably small radiative capture rate, and the corresponding immeasurably small photoionization cross section at energies on the order of the thermal binding energy.…”

Section: Introductionmentioning

confidence: 99%

The DX Center: Evidence for Charge Capture Via an Excited Intermediate State

Theis

Mooney

1989

MRS Proc.

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We review three important experimental results which suggest that electron capture and emission by the DX center in A1IGa 1 . 5 As proceeds via an excited intermediate state: the very different dependencies of the thermal capture and emission rates on alloy composition, the exponential dependence of the thermal capture rate on the quasi-equilibrium Fermi energy, and the thermal activation of the hot electron capture rate. None of these results is readily explained by a conventional lattice relaxation model, in which an electron is captured directly from the lowest lying band edge, but each can be simply explained if the dominant channel for multiphonon capture is via a transition state which lies well above the band edge. This picture is consistent with recent pseudopotential calculations which predict that the lattice relaxed state (the DX state) is stabilized by capture of more than one electron, since such a model naturally admits the possibility of an intermediate one-electron state.

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Theory of direct-interband-transition line shapes based on Mori’s method

Ryu

Chung

et al. 1987

Nouv Cim D

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High Magnetic Fields

Cited by 3 publications

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THE HERITABILITY OF FLUID, g_f, AND CRYSTALLISED, g_c, INTELLIGENCE, ESTIMATED BY A LEAST SQUARES USE OF THE MAVA METHOD

THE HERITABILITY OF FLUID, g_f, AND CRYSTALLISED, g_c, INTELLIGENCE, ESTIMATED BY A LEAST SQUARES USE OF THE MAVA METHOD

The DX Center: Evidence for Charge Capture Via an Excited Intermediate State

Theory of direct-interband-transition line shapes based on Mori’s method

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High Magnetic Fields

Cited by 3 publications

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THE HERITABILITY OF FLUID, gf, AND CRYSTALLISED, gc, INTELLIGENCE, ESTIMATED BY A LEAST SQUARES USE OF THE MAVA METHOD

THE HERITABILITY OF FLUID, gf, AND CRYSTALLISED, gc, INTELLIGENCE, ESTIMATED BY A LEAST SQUARES USE OF THE MAVA METHOD

The DX Center: Evidence for Charge Capture Via an Excited Intermediate State

Theory of direct-interband-transition line shapes based on Mori’s method

Contact Info

Product

Resources

About

THE HERITABILITY OF FLUID, g_f, AND CRYSTALLISED, g_c, INTELLIGENCE, ESTIMATED BY A LEAST SQUARES USE OF THE MAVA METHOD

THE HERITABILITY OF FLUID, g_f, AND CRYSTALLISED, g_c, INTELLIGENCE, ESTIMATED BY A LEAST SQUARES USE OF THE MAVA METHOD