- Cognitive Abilities and Testing
- Assisted Reproductive Technology and Twin Pregnancy
- Evolutionary Psychology and Human Behavior
- Demographic Trends and Gender Preferences
- Family Dynamics and Relationships
- Birth, Development, and Health
- Reproductive Health and Technologies
- Child and Adolescent Psychosocial and Emotional Development
- Prenatal Screening and Diagnostics
- Homicide, Infanticide, and Child Abuse
- Hemispheric Asymmetry in Neuroscience
- Attachment and Relationship Dynamics
- Grief, Bereavement, and Mental Health
- Sexual Differentiation and Disorders
- Cultural Differences and Values
- Evolutionary Game Theory and Cooperation
- Child and Animal Learning Development
- Autism Spectrum Disorder Research
- Suicide and Self-Harm Studies
- Behavioral Health and Interventions
- Genetic Associations and Epidemiology
- Child Welfare and Adoption
- Genetic Syndromes and Imprinting
- Neuroendocrine regulation and behavior
- Religion, Spirituality, and Psychology
California State University, Fullerton
2016-2025
California State University System
2005-2024
Centre for Social Sciences
2022
Amsterdam University of Applied Sciences
2012-2021
Kinokuniya
2019
Cambridge University Press
2019
New York University Press
2019
QIMR Berghofer Medical Research Institute
2019
Hospital Universitário da Universidade de São Paulo
2019
Universidade de São Paulo
2019
Since 1979, a continuing study of monozygotic and dizygotic twins, separated in infancy reared apart, has subjected more than 100 sets reared-apart twins or triplets to week intensive psychological physiological assessment. Like the prior, smaller studies about 70% variance IQ was found be associated with genetic variation. On multiple measures personality temperament, occupational leisure-time interests, social attitudes, apart are as similar together. These findings extend support those...
Monozygotic twins reared apart from an early age were used to test the hypothesis that there is a significant genetic component job satisfaction. Thirty-four monozygotic twin pairs who had been completed Minnesota Job Satisfaction Questionnaire as part of comprehensive work-history assessment. Three subscales formed satisfaction items reflect intrinsic, extrinsic, and general with current (or major) job. Intraclass correlations computed estimate proportion observed variability resulting...
G ingivitis and periodontitis are among the most common diseases known to man. Although bacterial plaque is generally accepted as primary etiologic agent, little information available concerning influence that host genetic factors have on these diseases. The purpose of present study was examine relative contribution environmental clinical measures periodontal disease through both reared‐together twins monozygous reared apart. Probing depth, attachment loss, gingivitis, were assessed from...
The authors hypothesized that significantly more living monozygotic than dizygotic co-twins of twin suicide victims would themselves have attempted suicide.They determined the absence or presence an attempt at any time among 26 and nine twins who had committed found 10 surviving but none suicide.Although may some differing developmental experiences, these results contribute to findings previous studies in suggesting genetic factors play a role suicidal behavior.
The Minnesota Importance Questionnaire (MIQ), measuring work values, was administered to 23 monozygotic and 20 dizygotic reared-apart twin pairs test the hypothesis that genetic factors are associated with values. Both univariate multivariate analyses were performed. In analysis, intraclass correlations computed estimate proportion of variability in values for each MIQ scales 6 higher order value scales. analysis used maximum likelihood estimation separate environmental correlated Results...
The identical Jim twins were raised in separate families and met for the first time at age thirty-nine, only to discover that they both suffered tension headaches, bit their fingernails, smoked Salems, enjoyed woodworking, vacationed on same Florida beach. This example of potential power genetics captured widespread media attention 1979 inspired Minnesota Study Twins Reared Apart. landmark investigation into nature-nurture debate shook scientific community by demonstrating, across a number...
The purpose of this study was to estimate the genetic variance for alveolar bone height by means classic twin method and monozygous twins reared apart. Panoramic radiographs were obtained from 120 pairs adult (mean age = 40.4 years, S.D. 10.4 years), comparison 62 together (MZT), 25 like-sexed dizygous (DZT), 33 apart (MZA). Mesial distal heights determined as a proportion tooth length. A full-mouth score computed each averaging these proportions all measurable teeth. Between-pair (B)...
Introduction Part I. Separated at Birth 1. Beer Cans and Key Rings 2. Switched 3. Oskar Jack II. Variations on Common Themes 4 Selectively Mute 5. Straight, Gay, Straight 6. Agnes to Andru III. Extraordinary Circumstances 7 Two Bodies One Soul 8. Twin Towers 9. A Good-News Story IV. Everyday Wonders 10. Selfless Love 11. Marital Math 12. Quad Boys Are Fine... Afterword Notes Acknowledgments