Arm nerve conduction velocity (NCV), brain NCV, reaction time, and intelligence

Reed, T. Edward; Jensen, Arthur R.

doi:10.1016/0160-2896(91)90021-5

Cited by 63 publications

(17 citation statements)

References 15 publications

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“…A possible explanation for the lack of correlation between NCV and IQ, therefore, is the use of the Raven IQ test. This lack of correlation is consistent with results of Jensen and Reed (1991), who found no correlation between median nerve arm NCV and IQ scores in two groups of students. In their university students, IQ was measured with the Raven Advanced Progressive Matrices, and for their community college students, the Standard version was used.…”

Section: Discussionsupporting

confidence: 92%

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Genetic analysis of peripheral nerve conduction velocity in twins

1995

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We studied variation in peripheral nerve conduction velocity (PNCV) and intelligence in a group of 16-year-old Dutch twins. It has been suggested that both brain nerve conduction velocity and PNCV are positively correlated with intelligence (Reed, 1984) and that heritable differences in NCV may explain part of the well established heritability of intelligence. The Standard Progressive Matrices test was administered to 210 twin pairs to obtain IQ scores. Median nerve PNCV was determined in a subgroup of 156 pairs. Genetic analyses showed a heritability of 0.65 for Raven IQ score and 0.77 for PNCV. However, there was no significant phenotypic correlation between IQ score and PNCV.

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Section: Discussionsupporting

confidence: 92%

“…However, Barrett et al (1990) found no correlation between median NCV and Raven Advanced Progressive Matrices in 44 British adults, and Reed and Jensen (1991) also failed to find a relation between median nerve conduction velocity and IQ in 200 Californian students.…”

Section: Introductionmentioning

confidence: 92%

Genetic analysis of peripheral nerve conduction velocity in twins

1995

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“…For example, R k may include very early sensory processes starting with light transduction processes within the retina and very late motor processes ending with the activation of single muscle fibers (e.g., Ulrich & Wing, 1991). Although there is evidence that residual processes have at most a weak correlation with overall processing time or intelligence (e.g., Reed & Jensen, 1991;Vernon & Mori, 1992), we nonetheless included the correlation parameters ρ ΔR and ρ GR in the model development for completeness and generality.…”

Section: The Individual Differences In Reaction Time (Idrt) Modelmentioning

confidence: 99%

“…In keeping with much current thinking about the relationship of RT to intelligence (e.g., Vernon, 1990), the ability of each participant to perform cognitive tasks is modeled in terms of a general processing time parameter, G k , which could be related to overall neural processing speed (e.g., Eysenck, 1986;Miller, 1994;Reed & Jensen, 1991;Vernon & Mori, 1992). This parameter may be thought of as the amount of time needed to carry out a single, arbitrarily defined unit of cognitive work, which we will sometimes refer to as the processing time.…”

Section: The Individual Differences In Reaction Time (Idrt) Modelmentioning

confidence: 99%

Mental chronometry and individual differences: Modeling reliabilities and correlations of reaction time means and effect sizes

2013

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We used a general stage-based model of reaction time (RT) to investigate the psychometric properties of mean RTs and experimental effect sizes (i.e., differences in mean RTs). Using the model, formulas were derived for the reliabilities of mean RTs and RT difference scores, and these formulas provide guidance about the number of trials per participant needed to obtain reliable estimates of these measures. In addition, formulas were derived for various different types of correlations computed in RT research (e.g., correlations between a mean RT and an external non-RT measure, between two mean RTs, between a mean RT and an RT effect size). The analysis revealed that observed RT-based correlations depend on many parameters of the underlying processes contributing to RT. We conclude that these correlations often fail to support the inferences drawn from them and that their proper interpretation is far more complex than is generally acknowledged.

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“…Although axonal conductance speed doesn't correlate with intelligence (Reed & Jensen, 1991), the latencies and amplitudes of sensory-evoked potentials (Tan, Akgun, Komsuoglu, & Telatar, 1993) and of various eventrelated potentials (ERPs) do (Robaey, Cansino, Dugas, & Renault, 1995). The relationship is such that elevated IQ scores correlate with higher amplitudes and shorter latencies.…”

Section: The Dialoguementioning

confidence: 99%

Letters on Nature and Nurture

Güntürkün¹

2006

Lifespan Development and the Brain

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Humans and most other animals have a dual origin. One of these origins is defined by the genetic background that assembles brains, thereby implanting prewired PRELUDEScientific inquiries into the interaction of biology and culture usually study a certain developmental span, an important event, or a neural, affective, or cognitive system to set a stage on which the details of biocultural coconstructivism can be outlined. This approach necessarily takes a narrow focus but provides great depth and insight into the interactive mechanisms. This book provides many outstanding examples of this kind of approach. As fruitful as this strategy is, there is also the need for a further perspective showing that biology and culture not only interact at the selected focus area, but also at every single entity that constitutes the human mind. It is difficult to couch such a broad picture without being too long or too shallow. I have therefore tried to express this view by a letter exchange between 379

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Arm nerve conduction velocity (NCV), brain NCV, reaction time, and intelligence

Cited by 63 publications

References 15 publications

Genetic analysis of peripheral nerve conduction velocity in twins

Genetic analysis of peripheral nerve conduction velocity in twins

Mental chronometry and individual differences: Modeling reliabilities and correlations of reaction time means and effect sizes

Letters on Nature and Nurture

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