Twin Studies Essay

Table 3-1 examines the correlations between selected characteristics for the identical twins separated at birth and the twins raised together. When compared to each other, they both have very similar brain wave activity, blood pressure and heart rate in the physiological characteristics. The Raven intelligence test was very similar, but the WAIS IQ displayed a bit of difference when compared to the other comparisons made. Personality wise, they typically had similar personalities at the same rate as twins raised together. Psychological interests were off a little bit, but still very similar. The twins that were separated at birth had less similar psychological interests compared to the twins

Twin studies are a vitally important tool for dissecting the nature versus nurture argument. Twins provide a naturally occurring experiment and they are most likely the best indicator of determining whether biology effects traits and psychopathology in human beings. Researchers are seeking circumstances involving twins providing evidence of known variations in the extent of genetic similarity or environmental stability. The key factor in utilizing twin studies to determine biological basis for personality differences exist among identical twins and fraternal twins. These studies provide data among the individuals that are genetically identical but yet, display visible differences that may be attributed to environmental differences. Additionally, researchers used such studies involving

However this theory lacks Parallel to this, the focus on genetics is Particularly convicted in twin studies, which establish a comparison between monozygotic twins that are identical and dizygotic twins, which are opposingly non-identical. This distinction can be identified in Torgersens study, which compared MZ and same sex DZ twins where one proband had an anxiety disorder, and it was discovered that such disorders were 5x more frequent in MZ twin pairs, who mutually shared identical genetics.

Method of research and Findings In this study, they are used several type of method, one of the technique is used two or more test instrument to ensure the adequate coverage, for example the participants were given a battery of personality and mental ability tests, interest and value inventories and psychomotor tests. In addition, separate of examiners administer the IQ test, life history interview, psychiatric interview and sexual life history interview. The twin also complete questionnaire independently under the constant supervision of the staff members. Twin studies are valuable to researchers because identical twins share 100% of their genes and fraternal twins share, on average, 50% of their genes. Both identical and fraternal twins share certain aspects of their environment (e.g. religious practices in the home). This allows researchers to estimate the heritability of certain traits. Participants are asked about academic ability, personality, and interests; family and social relationships; mental and physical health; physiological measurements. Of interest to researchers are prevalence of psychopathology, substance

Being a Twin- Personal Narrative As I walk through the crowded mall with my sister, little children stare, most adults do a discreet double take, and some bold adults question us outright. “Wow, are you twins?” “Do you know you look the same?” “What’s it like to be

Emily Gilson Group Project 12.20.17 Identical twins may share the same DNA make up and grow up in the same household, yet they have very distinct personalities. On the other hand, twins that may have been separated at birth, find that years later when they meet up for the first

I was born a twin and research studies show that with twins there is a high percentage that one twin may have a speech impairment. I was twin (a), the one who had the severe speech impairment. Growing up and not being able to speak properly had a major impact on my life. My speech was so severe that my mother and father use to tell me that they felt bad because they were my parents and they couldn’t understand what I was trying to say. Thanks to my twin sister she knew everything that I was trying to say and she would translate for me. I begin to take speech classes in kindergarten up until I was in the 5th grade. I never knew that my speech problem was so severe until I began school and all the other children begin to laugh and make fun of me because of the way I spoke, they would tell me “I spoke like a baby”.

Running Head: Scholarly vs. Popular Media Focus on Human Sexuality – Sexual Orientation Scholarly vs. Popular Media Focus on Human Sexuality Sexual Orientation GRIGOR OGANESYAN American Public University Leslie Griffin – CHFD220 Scholarly vs. Popular Media Focus on Human Sexuality – Sexual Orientation Scholar Article: Studies and research performed by biologists, neurologists, psychologists and geneticists, noted are the

Twin studies are a mainstay of the nature verse nurture debate because they allow researchers to conduct “natural experiments” on human beings. When researchers try to determine the relative importance of genetics and environment with regard to a certain condition, they have a hard time because they cannot generally get people with the same genes. This is where twin studies come in. Twins studies are part of the method used in behaviour genetics, which includes all data that are genetically informative. E.g. siblings, adoptees, pedigree data etc. Researchers use this method to estimate the heritability of traits and to quantify the effect of a person 's shared environment (family) and unique environment (the individual events that shape a life) on a trait.

This shows that homosexuality is a genetic trait since 100% identical twins were gay. The twins have the same DNA and are exhibiting the same trait. Another study to conduct research on environmentally caused conditions was conducted to see the correlation between peptic ulcer disease and identical/non-identical twins who had been reared apart. The results showed that peptic ulcer disease isn’t entirely caused by genetic as the twins had been brought up apart, the disease may also have been caused by their environment. Their diets may also be a factor. There is an ethical issue with conducting this experiment, as it is highly unethical to separate twins. Some diseases caused by genetics are cystic fibrosis and sickle cell anaemia. Some diseases caused by the environment are a cold and scarlet

Comparing My Twin Cousins For years I have been fascinated by that mysterious quirk of nature called twins. In my family, there are several sets of identical twins, and I have always concentrated on their similarities. I did not realize that identical twins also have many differences. My identical twin cousins, Sue and Heidi, appear to be perfect mirror images. They love to dress alike. They can feel each other's pain. They sound alike and can complete each other's sentences. But upon taking a closer look, I have found that they are as different as day and night. Aside from Sue and Heidi's outward characteristics, they possess several distinguishing traits that allow them to be viewed as two separate, independent

There are two main biological theories which explain the assumed causes of schizophrenia: Genetic and Dopamine Hypothesis. Research by Mikaywa et al has found that there must be a genetic explanation of schizophrenia due to the fact that concordance rates for environmental causes are not 100%. Also Mikaywa noticed that schizophrenia

The stigma of matching clothes, similar thoughts, and having the same fingerprints, surround being a twin but what about the correlation of education and growth on being a twin?

Scientists and psychologists everywhere study twins. The argument most commonly studied is nature versus nurture. The focus of this essay, however, is whether or not to separate twins in schools. Some believe the separation is demeaning and traumatic to the twins. The side about to be proved however that is this separation is a necessary step in the individualization of twins. Often, separation sparks the path to individualization.

From these studies, researchers have found that twins who have grown up in the same household share similarities in the way they think, act, dress, speak, etcetera. However, with the first type of twin studies, researchers could not differentiate whether the similarities were due to them having identical/similar genetic makeups or growing up in the same environments. Therefore, in order for psychologists to know whether similarities in twins are genetic or socially influenced, they studied twins who grew up in completely different households and environments. The study showed that despite growing up with a different family and in a different environment, they still had noticeable similarities in fashion, interests, and thought processes (K.W. Brown, personal communication, August 29, 2017). Twin studies, as well as other studies, have greatly contributed to our understanding of overall role that genes play in the development of psychological traits and behavior.