John T Manning

Dados Biográficos

ID3885153
NOMEJohn T Manning
PRENOMESJohn T
SOBRENOMEManning
ASSINATURAMANNING J T
AFILIAÇÕESUniversity of Lancashire
ORCID0000-0001-6365-355X
VERIFICADOSim
TOTAL DE OBRAS61
TOTAL DE CITAÇÕES190
TOTAL COMO AUTOR61
TOTAL COMO EDITOR0
PRIMEIRO ANO DE PUBLICAÇÃO1949
ANO MAIS RECENTE DE PUBLICAÇÃO2025
ÍNDICE H7

  • Is Alcohol Consumption Pattern Dependent on Prenatal Sex‐Steroids? A Digit Ratio ( 2D

    Open AccessBarbara Ślawski, Anna Kasielska‐trojan et al.ARTICLEAmerican Journal of Human Biology2025

    INTRODUCTION: There is evidence that alcohol consumption is influenced by prenatal sex steroids (as measured by digit ratio [2D:4D]). Here, we clarify the effect size of the relationship in a student (rather than a patient) population. METHODS: There were 258 (169 women) participants. Digit length was measured directly with calipers. Alcohol use was evaluated by the Polish version of Alcohol Use Disorders Identification Test (AUDIT) and operation…

  • Digit Ratio (2D

    Open AccessJohn T Manning, Bernhard Fink et al.ARTICLEArchives of Sexual Behavior2024

    Same-sex attraction may be linked to low prenatal androgen (in men) and high prenatal androgen (in women). Digit ratio (2D:4D) is thought to be a negative correlate of prenatal androgen and right-left 2D:4D (Dr-l) to reflect lateralized differences in sensitivity to prenatal androgen. Lower 2D:4D has been reported for lesbians compared to heterosexuals, but links to high 2D:4D in gay men are less clear. The largest study thus far (the BBC Interne…

  • The associations between digit ratio ( 2D

    Open AccessKoulla Parpa, John T Manning et al.ARTICLEAmerican Journal of Human Biology2024

    Introduction Digit ratio (2D:4D: the relative length of the 2nd and 4th digit) is thought to be a negative correlate of prenatal testosterone. The 2D:4D is related to oxygen metabolism, but the precise nature of this relationship is unclear. The purpose of the present study was to consider associations between digit ratios (right 2D:4D, left 2D:4D, right–left 2D:4D [Dr‐l]) and VO 2max and ventilatory thresholds (VT1 and VT2). Methods One hundred …

  • The effects of sex, nation, ethnicity, age and self-reported pubertal development on participant-measured right-left 2D

    Open AccessJohn T Manning, Bernhard Fink et al.ARTICLEJournal of Biosocial Science2023

    Digit ratio (2D:4D) – a proxy for prenatal sex steroids – shows sex, nationality and ethnic differences and is linked to pubertal onset. It is unclear whether right-left 2D:4D (Dr-l) also correlates with prenatal sex steroids, as evidence of these differences has been less conclusive. The present study examined the effects of sex, nation, ethnicity, age and self-reported pubertal development (i.e. the rate of physical development and age at menar…

  • Right–left digit ratios, a novel form of asymmetry

    Open AccessAnna Kasielska‐trojan, Anna Kasielska-Trojan et al.ARTICLEFrontiers in Public Health2022

    High right minus left (R-L) asymmetry of digit ratios has been reported to be linked to hospitalization for COVID-19. Here we examined the developmental patterns of this novel form of asymmetry in children and further explored their relationships to platelet counts and hospitalization for COVID-19 in adult patients. We considered ratios calculated from four digits (2D, 3D, 4D, 5D) in: (i) a sample of healthy participants aged 2 years to 18 years …

  • Digit ratio (2D

    Open AccessJohn T Manning, Bernhard Fink et al.ARTICLEJournal of Biosocial Science2022

    Digit ratio – a putative measure of prenatal sex steroids – may be related to body mass index (BMI). However, reports of correlations between 2D:4D and BMI have yielded mixed results with some studies showing no relationship while others have reported positive associations in men or women only. This study considers associations between self-reported 2D:4D and BMI in a large online survey (i.e. the BBC Internet Study). At the individual level, the…

  • Biology of Human Gender, The

    Open AccessJohn T Manning, Bernhard Fink et al.CHAPTEREncyclopedia of Evolutionary…2018

  • Digit Ratio

    Open AccessJohn T Manning, Bernhard FinkCHAPTEREncyclopedia of Evolutionary…2018

  • Sexual dimorphism in the ontogeny of second (2D) and fourth (4D) digit lengths, and digit ratio (2D

    Open AccessJohn T Manning, Bernhard FinkARTICLEAmerican Journal of Human Biology2018

    OBJECTIVE: Sex differences are often reported in digit lengths and digit ratio (2D:4D). However, the ontogeny of these sex differences and their interrelationships are less well known. METHODS: We considered sex differences in the lengths of the 2nd (2D) and 4th (4D) digit and 2D:4D in children aged 2 to 18 years (Sample I, n = 680) and adults aged 18 to 30 years (Sample II, n = 89,246). Digit length was determined by direct experimenter-measurem…

  • Relationships between the digit ratio (2D

    Open AccessKatelyn L Klapprodt, John S Fitzgerald et al.ARTICLEAmerican Journal of Human Biology2018

    OBJECTIVES: The primary aim of this study was to examine relationships between digit ratio (2D:4D) and game-related statistics in professional and semi-professional male basketball players. The secondary aim was to quantify differences in mean 2D:4Ds between starting and reserve players. METHODS: Using a cross-sectional design, 93 male basketball players from the professional Australian National Basketball League and the semi-professional South A…

  • Relationships between the second to fourth digit ratio (2 D

    Open AccessMakailah Dyer, Sandra E Short et al.ARTICLEAmerican Journal of Human Biology2018

    OBJECTIVE: Digit ratio (2D:4D) is a negative correlate of sports performance, although this relationship may be weak in open-skill sports such as basketball. The primary aim was to quantify relationships between 2D:4D and game-related statistics in semi-professional female basketball players. The secondary aim was to quantify the differences in mean 2D:4Ds between players based on their position in the starting lineup. METHODS: Using a cross-sect…

  • Relationships between digit ratio (2D

    Open AccessNathan A Frick, Melissa J Hull et al.ARTICLEAmerican Journal of Human Biology2017

    OBJECTIVE: To investigate relationships between the digit ratio (2D:4D) and competitive basketball performance in Australian men. METHODS: Using an observational cross-sectional design a total of 221 Australian basketball players who competed in the Olympic Games, International Basketball Federation World Championships/Cup, Australian National Basketball League, Central Australian Basketball League or socially had their 2D:4Ds measured. Analysis …

  • Relationships between digit ratio (2D

    Open AccessMelissa J Hull, Natasha K Schranz et al.ARTICLEAmerican Journal of Human Biology2015

    BACKGROUND: Digit ratio (2D:4D), a measure of prenatal testosterone exposure, is weakly-to-moderately associated with increased physical performance, although the evidence is far stronger for males than females. OBJECTIVE: To examine the relationship between 2D:4D and measured on-water rowing performance in young females competing at the Australian Rowing Championships. METHODS: Using an observational, cross-sectional design, female rowers (n = 6…

  • Body symmetry and physical strength in human males

    Open AccessBernhard Fink, Bettina Weege et al.ARTICLEAmerican Journal of Human Biology2014

    OBJECTIVES: Body symmetry and physical strength in males have been related to aspects of mate "quality"-women seem to prefer men who display both "good genes" (as indexed by high symmetry/developmental health) and fighting ability (as indexed by physical strength). Here we show that fluctuating asymmetry (FA) of the body and physical strength are negatively correlated. METHODS: Body FA (from 12 paired traits) and handgrip strength (HGS; a measure…

  • A Longitudinal Study of Digit Ratio (2D

    Robert Trivers, Robert Trivers Robert Trivers et al.ARTICLEHuman Biology2013

    A Longitudinal Study of Digit Ratio (2D:4D) and Its Relationships with Adult Running Speed in Jamaicans Robert Trivers, Renato Hopp, and John Manning Dear Editor, We write to point out that digit ratio may be a useful childhood biomarker for endurance running in adults. We have considered this question in a cohort of Jamaican children who have been studied from 1996 to the present day (Trivers et al. 1999). Digit ratio (2D:4D; the relative length…

  • Sex differences in 2D

    Open AccessButovskaya М, Marina Butovskaya et al.ARTICLEAmerican Journal of Physical…2013Citada por: 5Referências: 41

    The aim of this study was to consider digit ratio (2D:4D: a putative marker of prenatal testosterone and estrogen levels) and aggression in a sample of 1,452 children and adolescents (mean age 13.6 years) from five regions of Russia. The 2D:4D was calculated from direct measurements of the fingers, and aggression scores were obtained from completed Buss and Perry (J Pers Soc Psychol 63 (1992) 452–459) aggression questionnaires. The 2D:4D demonstr…

  • A Longitudinal Study of Digit Ratio (2D)

    Robert Trivers, Renato Hopp et al.ARTICLEHuman Biology2013Citada por: 2Referências: 1

  • No strong association between second to fourth digit ratio (2D

    Open AccessDavid Carlos Muller, John T Manning et al.ARTICLEAnnals of Human Biology2012

    2D:4D is not strongly associated with adult anthropometric measures, including those of adiposity

  • Is low digit ratio linked with late menarche? Evidence from the BBC internet study

    Open AccessJohn T Manning, Bernhard FinkARTICLEAmerican Journal of Human Biology2011

    OBJECTIVES: Age at menarche (AAM) in the general population may be influenced by prenatal sex steroids. The ratio of the second and fourth digits (2D:4D) is a putative correlate of prenatal sex steroids, but the relationship of 2D:4D to AAM is controversial. Matchock ([2008]: Am J Hum Biol 20:487-489) has reported that right 2D:4D (but not left) was negatively related to AAM, but Helle ([2010a]: Am J Hum Biol 22:418-420) found no relationship. He…

  • Digit ratio (2D

    Open AccessJohn T ManningARTICLEAmerican Journal of Human Biology2010

    Many studies have reported digit ratio (2D:4D) to be sexually dimorphic, (males lower 2D:4D than females). However, Kratochvíl and Flegr ([ 2009 ]: Biol Lett 5:643‐646) have suggested that 2D regressed on 4D has an allometric regression line with nonzero Y ‐intercept that is shared by males and females. Thus, 2D is shorter than expected when 4D is long, and males have lower 2D:4D than females because they have longer fingers. In this study, it is…

  • Digit ratio (2D

    Open AccessJohn T Manning, M R Hill et al.ARTICLEAmerican Journal of Human Biology2009

    Digit ratio (2D:4D), a putative correlate of prenatal testosterone, has been found to relate to performance in sport and athletics such that low 2D:4D (high prenatal testosterone) correlates with high performance. Speed in endurance races is strongly related to 2D:4D, and may be one factor that underlies the link between sport and 2D:4D, but nothing is known of the relationship between 2D:4D and sprinting speed. Here we show that running times ov…

  • A Comparison of Finger 2D

    Open AccessNoreen Caswell, John T ManningARTICLEArchives of Sexual Behavior2009Citada por: 13Referências: 14

  • Digit ratio (2D

    Open AccessJohn T Manning, Bernhard FinkARTICLEAmerican Journal of Human Biology2008

    Digit ratio (2D:4D) may be a correlate of prenatal sex steroids, and has been linked to traits, which are influenced by fetal testosterone and estrogen. Here we consider such links in a large Internet study of sex differences (the BBC Internet Study) in which finger lengths were self‐measured. Consistent with lab‐based findings the 2D:4D in this study shows sexual dimorphism, ethnic differences and higher dimorphism of right 2D:4D than left, ther…

  • Evidence for Assortative Mating on Digit Ratio (2d

    Open AccessMartin Voracek, Stefan Dressler et al.ARTICLEJournal of Biosocial Science2007

    The second-to-fourth digit ratio (2D:4D) presents an anatomical sex difference in humans. On average, men tend to have lower 2D:4D compared with women. There is fairly strong evidence for a role of the 2D:4D ratio as a biomarker for the organizational (permanent) effects of prenatal testosterone on the brain and behaviour. Recently, an accumulating research programme has shown 2D:4D to be related to a multitude of sex-dependent, hormonally influe…

  • Endurance running and digit ratio (2D

    Open AccessJohn T Manning, Laura Morris et al.ARTICLEAmerican Journal of Human Biology2007

    There is anatomical and physiological evidence that endurance running (ER), i.e., running one or more kilometers using aerobic metabolism, originated early in the evolution of Homo, and the consequences of early selection for ER may be important in modern Homo . Here we examine ER performance in competitive ER. ER is sex dependent such that men tend to run faster than women, and the influence of sex on ER suggests that it may be modified by testo…