Dominika Dykiert
University of Edinburgh
Publications 17
#1Tom Booth (Edin.: University of Edinburgh)H-Index: 7
#2Dominika Dykiert (Edin.: University of Edinburgh)H-Index: 10
Last.Ian J. Deary (Edin.: University of Edinburgh)H-Index: 128
view all 13 authors...
#1Erika J. LaukkaH-Index: 21
#2Dominika DykiertH-Index: 10
Last.Ian J. DearyH-Index: 128
view all 5 authors...
1 CitationsSource
#1Paul Hoffman (Edin.: University of Edinburgh)H-Index: 24
#2Simon R. Cox (Edin.: University of Edinburgh)H-Index: 20
Last.Ian J. Deary (Edin.: University of Edinburgh)H-Index: 128
view all 8 authors...
Abstract Cerebral grey and white matter MRI parameters are related to general intelligence and some specific cognitive abilities. Less is known about how structural brain measures relate specifically to verbal processing abilities. We used multi-modal structural MRI to investigate the grey matter (GM) and white matter (WM) correlates of verbal ability in 556 healthy older adults (mean age = 72.68 years, s.d. = .72 years). Structural equation modelling was used to decompose verbal performance int...
12 CitationsSource
#1Stuart J. RitchieH-Index: 9
#2Elliot M. Tucker-Drob (University of Texas at Austin)H-Index: 31
Last.Ian J. DearyH-Index: 128
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Abstract It is critical to discover why some people's cognitive abilities age better than others'. We applied multivariate growth curve models to data from a narrow-age cohort measured on a multi-domain IQ measure at age 11 years and a comprehensive battery of thirteen measures of visuospatial, memory, crystallized, and processing speed abilities at ages 70, 73, and 76 years ( n = 1091 at age 70). We found that 48% of the variance in change in performance on the thirteen cognitive measures was s...
28 CitationsSource
#1Riccardo E. Marioni (Edin.: University of Edinburgh)H-Index: 40
#2Jian Yang (UQ: University of Queensland)H-Index: 97
Last.Ian J. Deary (Edin.: University of Edinburgh)H-Index: 128
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Obesity and low cognitive function are associated with multiple adverse health outcomes across the life course. They have a small phenotypic correlation (r=−0.11; high body mass index (BMI)−low cognitive function), but whether they have a shared genetic aetiology is unknown. We investigated the phenotypic and genetic correlations between the traits using data from 6815 unrelated, genotyped members of Generation Scotland, an ethnically homogeneous cohort from five sites across Scotland. Genetic c...
17 CitationsSource
#1Dominika DykiertH-Index: 10
#2Geoffrey DerH-Index: 46
Last.Ian J. DearyH-Index: 128
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Background: Tests requiring the pronunciation of irregular words are used to estimate premorbid cognitive ability in patients with clinical diagnoses, and prior cognitive ability in normal ageing. However, scores on these word-reading tests correlate with scores on the Mini-Mental State Examination (MMSE), a widely-used screening test for possible cognitive pathology. The present study aimed to test whether the word-reading tests’ correlations with MMSE scores in healthy older people are explain...
4 CitationsSource
#1David Hope (Edin.: University of Edinburgh)H-Index: 4
#2Timothy C. BatesH-Index: 39
Last.Ian J. DearyH-Index: 128
view all 5 authors...
Greater cognitive ability in childhood is associated with increased longevity, and speedier reaction time (RT) might account for much of this linkage. Greater bodily symmetry is linked to both higher cognitive test scores and faster RTs. It is possible, then, that differences in bodily system integrity indexed by symmetry may underlie the associations of RT and intelligence with increased longevity. However, RT and symmetry have seldom been examined in the same study, and never in children. Here...
4 CitationsSource
#1Beverly A. Roberts (Edin.: University of Edinburgh)H-Index: 13
#2Ian J. Deary (Edin.: University of Edinburgh)H-Index: 128
Last.G. David Batty (UCL: University College London)H-Index: 65
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Objectives To investigate the association of reaction time with cancer incidence. Methods 6900 individuals aged 18 to 94 years who participated in the UK Health and Lifestyle Survey in 1984/1985 and were followed for a cancer registration for 25 years. Results Disease surveillance gave rise to 1015 cancer events from all sites. In general, there was essentially no clear pattern of association for either simple or choice reaction time with cancer of all sites combined, nor specific malignancies. ...
2 CitationsSource
#1Dominika Dykiert (Edin.: University of Edinburgh)H-Index: 10
#2Tom Booth (Edin.: University of Edinburgh)H-Index: 7
Last.Ian J. Deary (Edin.: University of Edinburgh)H-Index: 128
view all 3 authors...
Intra-individual variability (IIV), that is the inconsistency of responding across multiple trials of a test, has been suggested as a measure of cognitive performance alternative to the commonly-used mean level of performance. IIV in reaction time (RT) is a trait-like characteristic of an individual and has been purported as an index of the central nervous system functioning. In this study we investigated whether white matter integrity explains individual differences in RT IIV. Volume and severi...
#1David Hope (Edin.: University of Edinburgh)H-Index: 4
#2Timothy C. Bates (Edin.: University of Edinburgh)H-Index: 39
Last.Ian J. Deary (Edin.: University of Edinburgh)H-Index: 128
view all 5 authors...
Abstract Background Although bodily symmetry is widely used in studies of fitness and individual differences, little is known about how symmetry changes across development, especially in childhood. Aims To test how, if at all, bodily symmetry changes across childhood. Study design We measured bodily symmetry via digital images of the hands. Participants provided information on their age. We ran polynomial regression models testing for associations between age and symmetry. Subjects 887 children ...
6 CitationsSource