31 Neuroelectric signals of working memory predict IQ test scores

1998 ◽  
Vol 30 (1-2) ◽  
pp. 14-15
Author(s):  
Alan Gevins ◽  
Michael E. Smith ◽  
Georgia Rush
Keyword(s):  
Working Memory ◽  
Test Scores ◽  
Iq Test

Unproctored internet-based device-type effects on test scores: The role of working memory

Intelligence ◽  
2018 ◽  
Vol 67 ◽  
pp. 67-75 ◽  
Author(s):  
Winfred Arthur ◽  
Nathanael L. Keiser ◽  
Ellen Hagen ◽  
Zach Traylor
Keyword(s):  
Working Memory ◽  
Test Scores ◽  
Device Type

Quantification of trace metals in deciduous tooth enamel using energy dispersive X-ray fluorescence spectrometry

2021 ◽  
Author(s):  
Brian Kirkham
Keyword(s):  
Analytical Method ◽  
Test Scores ◽  
Tooth Enamel ◽  
Tap Water ◽  
Energy Dispersive ◽  
X Ray ◽  
Santa Ana ◽  
Iq Test ◽  
Essential Trace Elements ◽  
Positive Correlations

A non-destructive, multi-elemental analytical method using energy dispersive x-ray fluorescence (EDXRF) spectrometry was developed for the quantification of enamel-manganese (MnE) for comparison to dietary and tap water intakes of Mn, as well as children’s height, Weschler Abbreviated Scale of Intelligence Quotient (IQ) test scores and Santa Ana (SA) dexterity test scores. Using the novel analytical method, enamel-iron (FeE), copper (CuE), zinc (ZnE) and lead (PbE) were also quantified and correlated to one another and to children’s height, IQ test scores and SA dexterity test scores. Significant positive correlations were observed between all essential trace elements in surface enamel (Mn, Fe, Cu, Zn). MnE was found to have a weak correlation with estimated dietary intake of Mn (p < 0.01). No significant correlations were found between oral ingestion of Fe and FeE. Metal concentrations were observed to be highest in incisor enamel for all elements except zinc.

School performance and IQ-test scores at age 13 as related to birth weight and gestational age

1991 ◽  
Vol 32 (4) ◽  
pp. 316-324 ◽  
Author(s):  
MONICA LAGERSTRÖM ◽  
KATARINA BREMME ◽  
PETER ENEROTH ◽  
DAVID MAGNUSSON
Keyword(s):  
Birth Weight ◽  
School Performance ◽  
Gestational Age ◽  
Test Scores ◽  
Iq Test

School marks and IQ-test scores for low birth weight children at the age of 13

1991 ◽  
Vol 40 (2) ◽  
pp. 129-136 ◽  
Author(s):  
Monica Lagerström ◽  
Katarina Bremme ◽  
Peter Eneroth ◽  
Carl-Gunnar Janson
Keyword(s):  
Birth Weight ◽  
Low Birth Weight ◽  
Test Scores ◽  
Iq Test ◽  
Low Birth Weight Children

scholarly journals IQ and mental disorder in young men

2005 ◽  
Vol 187 (5) ◽  
pp. 407-415 ◽  
Author(s):  
Erik Lykke Mortensen ◽  
Holger Jelling Sørensen ◽  
Hans Henrik Jensen ◽  
June Machover Reinisch ◽  
Sarnoff A. Mednick
Keyword(s):  
Mental Disorder ◽  
Test Scores ◽  
Psychotic Disorders ◽  
Mental Disease ◽  
Diagnostic Categories ◽  
Iq Test ◽  
The Mean ◽  
Iq Scores ◽  
Low Iq ◽  
The Relationship

BackgroundMost research investigating the relationship between IQ and risk of mental disorder has focused on schizophrenia.AimsTo illuminate the relationship between IQ test scores in early adulthood and various mental disorders.MethodFor 3289 men from the Copenhagen Perinatal Cohort, military IQ test scores and information on psychiatric hospitalisation were available. We identified 350 men in the Danish Psychiatric Central Register, and compared the mean IQ test scores of nine diagnostic categories with the mean scores of 2939 unregistered cohort controls.ResultsSchizophrenia and related disorders, other psychotic disorders, adjustment, personality, alcohol and substance-use-related disorders were significantly associated with low IQ scores, but this association remained significant for the four non-psychotic disorders only when adjusting for comorbid diagnoses. For most diagnostic categories, test scores were positively associated with the length of the interval between testing and first admission. ICD mood disorders as well as neuroses and related disorders were not significantly associated with low IQ scores.ConclusionsLow IQ may be a consequence of mental disease or a causal factor in psychotic and non-psychotic disorders.

The power to detect sex differences in IQ test scores using Multi-Group Covariance and Means Structure Analyses

Intelligence ◽  
2009 ◽  
Vol 37 (4) ◽  
pp. 396-404 ◽  
Author(s):  
Dylan Molenaar ◽  
Conor V. Dolan ◽  
Jelte M. Wicherts
Keyword(s):  
Sex Differences ◽  
Test Scores ◽  
Iq Test

scholarly journals Diminishing returns as a function of disturbance

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9490
Author(s):  
Kimmo Sorjonen ◽  
Bo Melin
Keyword(s):  
Test Scores ◽  
High Ability ◽  
Disturbing Factor ◽  
Iq Test ◽  
Diminishing Returns ◽  
Present Simulation ◽  
Low Motivation

According to Spearman’s law of diminishing returns (SLODR), IQ test scores are more g saturated among those with low, compared to those with high, ability. The present simulation shows that such difference in saturation can be observed if test scores are affected by a disturbing factor, for example, low motivation, illness, or linguistic confusion, that varies in magnitude between individuals. More contemporary criteria of SLODR can also be satisfied if test scores are affected by disturbance, especially if the disturbance variable is negatively skewed. This indicates a possible threat against the validity of findings supporting SLODR and points at the importance for researchers to try to eliminate the influence of such disturbing factors from their studies.

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