Family effects on the digit ratio (2D:4D): The role of the interbirth interval

2019 ◽  
pp. e23260
Author(s):  
Miroslav Králík ◽  
Adela Hupková ◽  
Tomáš Zeman ◽  
Martin Hložek ◽  
Lukáš Hlaváček ◽  
...  
Keyword(s):  
Digit Ratio ◽  
Interbirth Interval ◽  
Family Effects

Work–family effects of LMX: the moderating role of work–home segmentation preferences

2016 ◽  
Vol 27 (4) ◽  
pp. 671-683 ◽  
Author(s):  
Yi Liao ◽  
Ziwei Yang ◽  
Minmin Wang ◽  
Ho Kwong Kwan
Keyword(s):  
Family Effects ◽  
Work Family ◽  
Moderating Role

Payment scheme changes and effort Adjustment: The role of 2D:4D digit ratio

2018 ◽  
Vol 72 ◽  
pp. 86-94 ◽  
Author(s):  
Andreas Friedl ◽  
Levent Neyse ◽  
Ulrich Schmidt
Keyword(s):  
Digit Ratio ◽  
Payment Scheme

Work-Family Effects of LMX: The Moderating Role of Work-Home Segmentation Preference

2015 ◽  
Vol 2015 (1) ◽  
pp. 16301
Author(s):  
Minmin Wang ◽  
Yi Liao ◽  
Ziwei Yang ◽  
Long-Zeng Wu
Keyword(s):  
Family Effects ◽  
Work Family ◽  
Moderating Role

scholarly journals The Proband-Sibling Design in Psychiatry, with Two Technical Notes

1976 ◽  
Vol 21 (2) ◽  
pp. 101-107 ◽  
Author(s):  
D.R. Offord ◽  
Marshall B. Jones
Keyword(s):  
External Validity ◽  
Statistical Technique ◽  
Geographic Mobility ◽  
Psychiatric Research ◽  
Sibship Size ◽  
Technical Problems ◽  
Family Effects ◽  
Regression Effects ◽  
Sibling Design

This paper examines the strengths and limitations of the proband-sibling design. As controls, siblings have two major advantages over biologically unrelated subjects. First, they provide better matching and, second, the sibling design is free from regression effects. Only discordant identical co-twins are stronger controls. However, discordant identical twins are not as available for psychiatric research as siblings; the design is sensitive to environmental differences only; and the conclusions reached have less external validity than those reached through proband-sibling comparisons. The limitations of the sibling design include a skewing towards larger sibships and an inability to detect between-family effects. These strengths and limitations are explored and their implications for psychiatric research discussed. Two technical problems associated with this design are examined. First, a statistical technique is presented which allows it to be determined whether the proband is different from his siblings without regard to sibship size or the form of the dependent variable. Second, it is shown how the role of geographic mobility can be clarified in follow-back studies using the proband-sibling design.

scholarly journals Digit ratio and prosocial behavior: the role of innate aggression in public goods and trust games

2020 ◽  
Vol 56 (1&2) ◽  
pp. 42-72
Author(s):  
Jahm Mae Guinto ◽  
Charlotte May Amante ◽  
Franz Nicole Carlos ◽  
Arlene Daro ◽  
Mariella Jasmin Marasigan ◽  
...  
Keyword(s):  
Public Goods ◽  
Prosocial Behavior ◽  
Digit Ratio ◽  
Trust Games

scholarly journals A study of second to fourth digit ratio in relation to verbal and numerical intelligence among medical students

Biomedicine ◽  
2021 ◽  
Vol 41 (2) ◽  
pp. 283-286
Author(s):  
G. B. Vidya ◽  
S Bhat ◽  
L.B. Kavitha
Keyword(s):  
Medical Students ◽  
Intellectual Development ◽  
Standard Procedure ◽  
Ring Finger ◽  
Digit Ratio ◽  
Male Students ◽  
Verbal Intelligence ◽  
Cognitive Domains ◽  
Prenatal Androgens

Introduction and Aim: Prenatal androgens are believed to be one of the probable etiological factors influencing intellectual development of an individual. In-utero testosterone exposure has been thought to affect the digit ratio which is the ratio of lengths of index finger and ring finger (2D:4D). In the present work we intended to study the correlation of 2D:4D with numerical and verbal intelligence believed to be variable among genders. The aim of our study was to find the association of 2D:4D with Verbal Intelligence and Numerical Intelligence in a sample of medical students.                                Materials and Methods: This study was conducted in a sample of medical students. 44 female and 44 male students participated in the study. 2D:4D measurements were made using standard procedure after which the participants completed a questionnaire containing 20 questions each to test numerical and verbal intelligence.   Results: In this study, Males were found to have a lower 2D:4D when compared to females. Individuals with lower 2D:4D in their right-hand were seen to have lower verbal intelligence and higher numerical intelligence thus suggesting that males are born with  better numerical intelligence and females with greater verbal intelligence.   Conclusion: Digit ratio can be considered as a valuable indicator of individual differences in terms of intelligence, although the exact role of testosterone on brain to cause variation in these cognitive domains is yet to be clearly understood.

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