Izzet Duyar
Biographic Data
| ID | 98910 |
|---|---|
| NAME | Izzet Duyar |
| GIVEN NAMES | Izzet |
| FAMILY NAME | Duyar |
| SIGNATURE | DUYAR I |
| AFFILIATIONS | Istanbul University |
| ORCID | 0000-0002-4578-0528 |
| VERIFIED | Yes |
| TOTAL WORKS | 22 |
| TOTAL CITATIONS | 30 |
| AUTHOR COUNT | 22 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1998 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 2 |
Sociosexual orientation, life history strategy, and reproductive success: A large-scale cross-cultural analysis across 92 contemporary societies
The function of love: A signaling-to-alternatives account of the commitment device hypothesis
Exploring Attitudes Toward “Sugar Relationships” Across 87 Countries: A Global Perspective on Exchanges of Resources for Sex and Companionship
The current study investigates attitudes toward one form of sex for resources: the so-called sugar relationships, which often involve exchanges of resources for sex and/or companionship. The present study examined associations among attitudes toward sugar relationships and relevant variables (e.g., sex, sociosexuality, gender inequality, parasitic exposure) in 69,924 participants across 87 countries. Two self-report measures of Acceptance of Suga…
Validation of the Short Version (TLS-15) of the Triangular Love Scale (TLS-45) across 37 Languages
Love is a phenomenon that occurs across the world and affects many aspects of human life, including the choice of, and process of bonding with, a romantic partner. Thus, developing a reliable and valid measure of love experiences is crucial. One of the most popular tools to quantify love is Sternberg’s 45-item Triangular Love Scale (TLS-45), which measures three love components: intimacy, passion, and commitment. However, our literature review re…
Love as a Commitment Device: Evidence from a Cross-Cultural Study across 90 Countries
Given the ubiquitous nature of love, numerous theories have been proposed to explain its existence. One such theory refers to love as a commitment device, suggesting that romantic love evolved to foster commitment between partners and enhance their reproductive success. In the present study, we investigated this hypothesis using a large-scale sample of 86,310 individual responses collected across 90 countries. If romantic love is universally perc…
Conservatism Negatively Predicts Creativity: A Study Across 28 Countries
Previous studies have found a negative relationship between creativity and conservatism. However, as these studies were mostly conducted on samples of homogeneous nationality, the generalizability of the effect across different cultures is unknown. We addressed this gap by conducting a study in 28 countries. Based on the notion that attitudes can be shaped by both environmental and ecological factors, we hypothesized that parasite stress can also…
Erken Tunç Çağında Fiziksel Aktivite ve Mobilite: Resuloğlu (Çorum) İskeletlerine Ait Uzun Kemiklerin Kesitsel Geometrik Analizi
Giriş: Arkeolojik alanlarda ele geçen organik kalıntılardan yola çıkarak insanların hareket tarzları ve geçim örüntülerini ortaya çıkarmaya çalışan araştırmalarda son dönemlerde önemli gelişmeler kaydedilmiştir. Bu anlamda uzun kemiklerin kesit özelliklerinin (geometrisinin) biyomekanik yöntemlerle incelenmesi önemli katkılar sağlamıştır. Amaç: Bu çalışmada, Resuloğlu (Çorum) Erken Tunç Çağı (ETÇ III) topluluğuna ait uzun kemiklerin kesitsel geom…
Huzurevinde ve ev ortamında yaşayan yaşlılarda beden kitle endisi (BKE) değerleri: Hatay örneği
Bu çalışmada, Hatay ilinde doğmuş ve bu ilde yaşayan iki grup (ev ortamında yaşayanlar ile huzurevinde kalanlar) yaşlı nüfusta beden kitle endisi (BKE) değerleri karşılaştırmalı olarak irdelenmiştir. Çalışma Hatay’da benzer sosyoekonomik koşullara sahip, evde yaşayan 242 (114 erkek, 128 kadın), huzurevinde yaşayan 83 (57 erkek, 26 kadın) 65 yaş ve üstü bireyler üzerinde gerçekleştirilmiştir. Yaşlılarla görüşülerek onların sosyal ve demografik öze…
Predictors of enhancing human physical attractiveness: Data from 93 countries
People across the world and throughout history have gone to great lengths to enhance their physical appearance. Evolutionary psychologists and ethologists have largely attempted to explain this phenomenon via mating preferences and strategies. Here, we test one of the most popular evolutionary hypotheses for beauty-enhancing behaviors, drawn from mating market and parasite stress perspectives, in a large cross-cultural sample. We also test hypoth…
Affective Interpersonal Touch in Close Relationships: A Cross-Cultural Perspective
Interpersonal touch behavior differs across cultures, yet no study to date has systematically tested for cultural variation in affective touch, nor examined the factors that might account for this variability. Here, over 14,000 individuals from 45 countries were asked whether they embraced, stroked, kissed, or hugged their partner, friends, and youngest child during the week preceding the study. We then examined a range of hypothesized individual…
Sex Differences in Mate Preferences Across 45 Countries: A Large-Scale Replication
Considerable research has examined human mate preferences across cultures, finding universal sex differences in preferences for attractiveness and resources as well as sources of systematic cultural variation. Two competing perspectives—an evolutionary psychological perspective and a biosocial role perspective—offer alternative explanations for these findings. However, the original data on which each perspective relies are decades old, and the li…
Universality of the Triangular Theory of Love: Adaptation and Psychometric Properties of the Triangular Love Scale in 25 Countries
The Triangular Theory of Love (measured with Sternberg's Triangular Love Scale - STLS) is a prominent theoretical concept in empirical research on love. To expand the culturally homogeneous body of previous psychometric research regarding the STLS, we conducted a large-scale cross-cultural study with the use of this scale. In total, we examined more than 11,000 respondents, but as a result of applied exclusion criteria, the final analyses were ba…
Assortative mating and the evolution of desirability covariation
A case of ankylosing spondylitis from the excavations at Kılıçlı Necropolis (Sinope, Northern Turkey) and its implications on the antiquity of the disease in Anatolia
Ankylosing spondylitis (AS) is a chronic, inflammatory, and progressive rheumatic disease that is a member of a family of disease referred to as spondyloarthritis. Although the prevalence estimates of AS vary from 0.25% up to 4.5% in living human populations, the frequency of the disease in the past has not yet been determined. Some suspected AS cases have been reported only based on the vertebral ankyloses or fusions of sacroiliac joints dating …
Self‐reported aggressiveness is not related to developmental instability
OBJECTIVE: In recent years, several researchers have focused on the relationship between fluctuating asymmetry and aggression. These studies reveal conflicting results. In this study, we examined the relationship between bodily symmetry and self-reported aggressive behavior in healthy young people living in Turkey. METHODS: The sample comprised of 100 male and 102 female university students recruited from Cumhuriyet University, Sivas. The Buss an…
Inbreeding is associated with lower 2D: 4D digit ratio
OBJECTIVES: While consanguineous marriage has been shown to result in a small increase in risk of recessive Mendelian disorders among offspring, far less research has been conducted on the effects of inbreeding on complex traits. These effects, thought to result from increased developmental instability due to loss of heterozygosity, are expected to be found more pervasively than rare recessive Mendelian traits and are expected to result in increa…
The effect of labour on somatotype of males during the adolescent growth period
A new method of stature estimation for forensic anthropological application
In forensic and anthropological studies, body height is usually estimated from a single regression formula of the population of interest. The aim of this study was to test the accuracy of regression formulae devised for different stature groups (short, medium, tall) within the same population. Our study is based on 242 adult male subjects aged 18.1–44.6 years. Body height, tibia length, and ulna length were measured by standard anthropometric tec…
Growth and nutritional status of male adolescent laborers in Ankara, Turkey
Undernutrition, pathogenic agents, and poor living conditions are of primary importance in the evaluation of adverse environmental conditions' effects on human growth; but child labor (an equally significant factor, especially in underdeveloped countries) is generally overlooked or ignored. The aim of this study is to focus on this subject and clarify the effects of labor on the physical growth and nutritional status of child and adolescent labor…
A new approach for calibrating dental caries frequency of skeletal remains
Body height estimation based on tibia length in different stature groups
Long bone length is one of the best‐known indicators of human stature. Although the long bone length/height ratio differs in tall and short individuals, no detailed study has investigated whether specific formulae should be used to calculate height in different stature groups. This study proposes a new height estimation method. Body height and tibia length were measured in 121 male subjects aged 18.0–34.3 years. Three subgroups were established a…
Enver Yaşar Bostancı ve büyüme araştırmalarına katkıları
Body height estimation based on tibia length in different stature groups
Long bone length is one of the best‐known indicators of human stature. Although the long bone length/height ratio differs in tall and short individuals, no detailed study has investigated whether specific formulae should be used to calculate height in different stature groups. This study proposes a new height estimation method. Body height and tibia length were measured in 121 male subjects aged 18.0–34.3 years. Three subgroups were established a…
Universality of the Triangular Theory of Love: Adaptation and Psychometric Properties of the Triangular Love Scale in 25 Countries
The Triangular Theory of Love (measured with Sternberg's Triangular Love Scale - STLS) is a prominent theoretical concept in empirical research on love. To expand the culturally homogeneous body of previous psychometric research regarding the STLS, we conducted a large-scale cross-cultural study with the use of this scale. In total, we examined more than 11,000 respondents, but as a result of applied exclusion criteria, the final analyses were ba…
Love as a Commitment Device: Evidence from a Cross-Cultural Study across 90 Countries
Given the ubiquitous nature of love, numerous theories have been proposed to explain its existence. One such theory refers to love as a commitment device, suggesting that romantic love evolved to foster commitment between partners and enhance their reproductive success. In the present study, we investigated this hypothesis using a large-scale sample of 86,310 individual responses collected across 90 countries. If romantic love is universally perc…
A case of ankylosing spondylitis from the excavations at Kılıçlı Necropolis (Sinope, Northern Turkey) and its implications on the antiquity of the disease in Anatolia
Ankylosing spondylitis (AS) is a chronic, inflammatory, and progressive rheumatic disease that is a member of a family of disease referred to as spondyloarthritis. Although the prevalence estimates of AS vary from 0.25% up to 4.5% in living human populations, the frequency of the disease in the past has not yet been determined. Some suspected AS cases have been reported only based on the vertebral ankyloses or fusions of sacroiliac joints dating …
A new method of stature estimation for forensic anthropological application
In forensic and anthropological studies, body height is usually estimated from a single regression formula of the population of interest. The aim of this study was to test the accuracy of regression formulae devised for different stature groups (short, medium, tall) within the same population. Our study is based on 242 adult male subjects aged 18.1–44.6 years. Body height, tibia length, and ulna length were measured by standard anthropometric tec…
Growth and nutritional status of male adolescent laborers in Ankara, Turkey
Undernutrition, pathogenic agents, and poor living conditions are of primary importance in the evaluation of adverse environmental conditions' effects on human growth; but child labor (an equally significant factor, especially in underdeveloped countries) is generally overlooked or ignored. The aim of this study is to focus on this subject and clarify the effects of labor on the physical growth and nutritional status of child and adolescent labor…
The function of love: A signaling-to-alternatives account of the commitment device hypothesis
Conservatism Negatively Predicts Creativity: A Study Across 28 Countries
Previous studies have found a negative relationship between creativity and conservatism. However, as these studies were mostly conducted on samples of homogeneous nationality, the generalizability of the effect across different cultures is unknown. We addressed this gap by conducting a study in 28 countries. Based on the notion that attitudes can be shaped by both environmental and ecological factors, we hypothesized that parasite stress can also…
Enver Yaşar Bostancı ve büyüme araştırmalarına katkıları
A new approach for calibrating dental caries frequency of skeletal remains
Body height estimation based on tibia length in different stature groups
Long bone length is one of the best‐known indicators of human stature. Although the long bone length/height ratio differs in tall and short individuals, no detailed study has investigated whether specific formulae should be used to calculate height in different stature groups. This study proposes a new height estimation method. Body height and tibia length were measured in 121 male subjects aged 18.0–34.3 years. Three subgroups were established a…
Growth and nutritional status of male adolescent laborers in Ankara, Turkey
Undernutrition, pathogenic agents, and poor living conditions are of primary importance in the evaluation of adverse environmental conditions' effects on human growth; but child labor (an equally significant factor, especially in underdeveloped countries) is generally overlooked or ignored. The aim of this study is to focus on this subject and clarify the effects of labor on the physical growth and nutritional status of child and adolescent labor…
A new method of stature estimation for forensic anthropological application
In forensic and anthropological studies, body height is usually estimated from a single regression formula of the population of interest. The aim of this study was to test the accuracy of regression formulae devised for different stature groups (short, medium, tall) within the same population. Our study is based on 242 adult male subjects aged 18.1–44.6 years. Body height, tibia length, and ulna length were measured by standard anthropometric tec…
The effect of labour on somatotype of males during the adolescent growth period
Inbreeding is associated with lower 2D: 4D digit ratio
OBJECTIVES: While consanguineous marriage has been shown to result in a small increase in risk of recessive Mendelian disorders among offspring, far less research has been conducted on the effects of inbreeding on complex traits. These effects, thought to result from increased developmental instability due to loss of heterozygosity, are expected to be found more pervasively than rare recessive Mendelian traits and are expected to result in increa…
Self‐reported aggressiveness is not related to developmental instability
OBJECTIVE: In recent years, several researchers have focused on the relationship between fluctuating asymmetry and aggression. These studies reveal conflicting results. In this study, we examined the relationship between bodily symmetry and self-reported aggressive behavior in healthy young people living in Turkey. METHODS: The sample comprised of 100 male and 102 female university students recruited from Cumhuriyet University, Sivas. The Buss an…
Assortative mating and the evolution of desirability covariation
A case of ankylosing spondylitis from the excavations at Kılıçlı Necropolis (Sinope, Northern Turkey) and its implications on the antiquity of the disease in Anatolia
Ankylosing spondylitis (AS) is a chronic, inflammatory, and progressive rheumatic disease that is a member of a family of disease referred to as spondyloarthritis. Although the prevalence estimates of AS vary from 0.25% up to 4.5% in living human populations, the frequency of the disease in the past has not yet been determined. Some suspected AS cases have been reported only based on the vertebral ankyloses or fusions of sacroiliac joints dating …
Sex Differences in Mate Preferences Across 45 Countries: A Large-Scale Replication
Considerable research has examined human mate preferences across cultures, finding universal sex differences in preferences for attractiveness and resources as well as sources of systematic cultural variation. Two competing perspectives—an evolutionary psychological perspective and a biosocial role perspective—offer alternative explanations for these findings. However, the original data on which each perspective relies are decades old, and the li…
Universality of the Triangular Theory of Love: Adaptation and Psychometric Properties of the Triangular Love Scale in 25 Countries
The Triangular Theory of Love (measured with Sternberg's Triangular Love Scale - STLS) is a prominent theoretical concept in empirical research on love. To expand the culturally homogeneous body of previous psychometric research regarding the STLS, we conducted a large-scale cross-cultural study with the use of this scale. In total, we examined more than 11,000 respondents, but as a result of applied exclusion criteria, the final analyses were ba…
Affective Interpersonal Touch in Close Relationships: A Cross-Cultural Perspective
Interpersonal touch behavior differs across cultures, yet no study to date has systematically tested for cultural variation in affective touch, nor examined the factors that might account for this variability. Here, over 14,000 individuals from 45 countries were asked whether they embraced, stroked, kissed, or hugged their partner, friends, and youngest child during the week preceding the study. We then examined a range of hypothesized individual…
Predictors of enhancing human physical attractiveness: Data from 93 countries
People across the world and throughout history have gone to great lengths to enhance their physical appearance. Evolutionary psychologists and ethologists have largely attempted to explain this phenomenon via mating preferences and strategies. Here, we test one of the most popular evolutionary hypotheses for beauty-enhancing behaviors, drawn from mating market and parasite stress perspectives, in a large cross-cultural sample. We also test hypoth…
Erken Tunç Çağında Fiziksel Aktivite ve Mobilite: Resuloğlu (Çorum) İskeletlerine Ait Uzun Kemiklerin Kesitsel Geometrik Analizi
Giriş: Arkeolojik alanlarda ele geçen organik kalıntılardan yola çıkarak insanların hareket tarzları ve geçim örüntülerini ortaya çıkarmaya çalışan araştırmalarda son dönemlerde önemli gelişmeler kaydedilmiştir. Bu anlamda uzun kemiklerin kesit özelliklerinin (geometrisinin) biyomekanik yöntemlerle incelenmesi önemli katkılar sağlamıştır. Amaç: Bu çalışmada, Resuloğlu (Çorum) Erken Tunç Çağı (ETÇ III) topluluğuna ait uzun kemiklerin kesitsel geom…
Huzurevinde ve ev ortamında yaşayan yaşlılarda beden kitle endisi (BKE) değerleri: Hatay örneği
Bu çalışmada, Hatay ilinde doğmuş ve bu ilde yaşayan iki grup (ev ortamında yaşayanlar ile huzurevinde kalanlar) yaşlı nüfusta beden kitle endisi (BKE) değerleri karşılaştırmalı olarak irdelenmiştir. Çalışma Hatay’da benzer sosyoekonomik koşullara sahip, evde yaşayan 242 (114 erkek, 128 kadın), huzurevinde yaşayan 83 (57 erkek, 26 kadın) 65 yaş ve üstü bireyler üzerinde gerçekleştirilmiştir. Yaşlılarla görüşülerek onların sosyal ve demografik öze…
Exploring Attitudes Toward “Sugar Relationships” Across 87 Countries: A Global Perspective on Exchanges of Resources for Sex and Companionship
The current study investigates attitudes toward one form of sex for resources: the so-called sugar relationships, which often involve exchanges of resources for sex and/or companionship. The present study examined associations among attitudes toward sugar relationships and relevant variables (e.g., sex, sociosexuality, gender inequality, parasitic exposure) in 69,924 participants across 87 countries. Two self-report measures of Acceptance of Suga…
Validation of the Short Version (TLS-15) of the Triangular Love Scale (TLS-45) across 37 Languages
Love is a phenomenon that occurs across the world and affects many aspects of human life, including the choice of, and process of bonding with, a romantic partner. Thus, developing a reliable and valid measure of love experiences is crucial. One of the most popular tools to quantify love is Sternberg’s 45-item Triangular Love Scale (TLS-45), which measures three love components: intimacy, passion, and commitment. However, our literature review re…
Love as a Commitment Device: Evidence from a Cross-Cultural Study across 90 Countries
Given the ubiquitous nature of love, numerous theories have been proposed to explain its existence. One such theory refers to love as a commitment device, suggesting that romantic love evolved to foster commitment between partners and enhance their reproductive success. In the present study, we investigated this hypothesis using a large-scale sample of 86,310 individual responses collected across 90 countries. If romantic love is universally perc…
Conservatism Negatively Predicts Creativity: A Study Across 28 Countries
Previous studies have found a negative relationship between creativity and conservatism. However, as these studies were mostly conducted on samples of homogeneous nationality, the generalizability of the effect across different cultures is unknown. We addressed this gap by conducting a study in 28 countries. Based on the notion that attitudes can be shaped by both environmental and ecological factors, we hypothesized that parasite stress can also…
The function of love: A signaling-to-alternatives account of the commitment device hypothesis
Sociosexual orientation, life history strategy, and reproductive success: A large-scale cross-cultural analysis across 92 contemporary societies
Psychology (11 works) · Evolutionary Psychology and Human Behavior (10 works) · Social Psychology (9 works) · Developmental psychology (8 works) · Biology (7 works) · Demography (7 works) · Medicine (7 works) · Mathematics (6 works) · Population (6 works) · Sociology (6 works)