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Related Concept Videos

Longitudinal Studies01:26

Longitudinal Studies

Longitudinal studies are also widely used in other medical and social science fields. For instance, in cardiovascular research, they can monitor patients' health over decades to identify risk factors for heart disease, such as high cholesterol or smoking, and evaluate the long-term effectiveness of preventive measures. Similarly, in mental health studies, researchers might follow individuals from adolescence into adulthood to understand the development and progression of conditions like...
Longitudinal Research02:20

Longitudinal Research

Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
Facial Feedback Hypothesis01:24

Facial Feedback Hypothesis

Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role of...
Case Studies01:22

Case Studies

There are many research methods available to psychologists in their efforts to understand, describe, and explain behavior and the cognitive and biological processes that underlie it.
Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and solid...

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Fullerton Virtual Twin Study: an update.

Nancy L Segal1, Shirley A McGuire, Jamie L Graham

  • 1Department of Psychology, California State University, Fullerton, CA, USA. nsegal@fullerton.edu

Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies
|December 11, 2012
PubMed
Summary
This summary is machine-generated.

Virtual twins (VTs) are unrelated siblings raised together, offering a unique model to study environmental influences. Research explores their development in areas like intelligence and social behavior.

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Area of Science:

  • Behavioral Science
  • Developmental Psychology
  • Genetics

Background:

  • Virtual twins (VTs) are same-age, unrelated siblings reared together from infancy.
  • They serve as a unique model to study environmental influences, replicating twinship without genetic links.
  • The Fullerton Virtual Twin Study at CSUF, established in 1991, maintains a registry of 151 VT pairs.

Purpose of the Study:

  • To investigate the impact of shared environment on various developmental aspects.
  • To utilize VTs as a control group for genetic studies, including epigenetic analyses.
  • To explore a wide range of research areas, including intelligence, social behavior, and parenting.

Main Methods:

  • Identification and continuous recruitment of virtual twin pairs.
  • Longitudinal studies examining general intelligence, body size, and social behaviors.
  • Comparative analyses with monozygotic twins, dizygotic twins, siblings, and friends (TAPS project).

Main Results:

  • Research has encompassed general intelligence, body size, interpersonal trust, social coordination, social networks, and parenting.
  • VTs provide a valuable comparison group for understanding environmental effects versus genetic influences.
  • Ongoing research continues to expand the understanding of VT development and their utility in scientific research.

Conclusions:

  • Virtual twins offer a powerful, naturally occurring experimental design to disentangle genetic and environmental factors.
  • The Fullerton Virtual Twin Study registry provides a valuable resource for diverse research fields.
  • VTs are crucial for future epigenetic studies, particularly in understanding environmental impacts on gene expression.