Twin Family Studies

Two little girls with matching pink dresses, light up shoes, backpacks double their size skip off to the bus for their very first day of school. To a five year old, kindergarten was a big deal. The first time away from their parents, a new environment, and very intimidating older kids. I knew I was lucky, I got to take on this new experience with my built-in best friend and somehow, knowing that made all the difference.

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

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 a twin?” “Do you have, like, psychic powers, or something with each other?” These are the most common questions twins hear. Almost all twins don’t really mind them and sometimes the attention is cool. Mostly, we just smile tolerantly at each other and answer them as best we can. After all, we don’t really know how to describe being a twin. We have never known anything else. Nonetheless, here we are. So, as a person who might not know exactly what she is talking

The study of Social anxiety shows no clear causes for its variety of symptoms, but psychologists have been able to determined triggers and possible factors for its development. As psychologists continue to study social phobia, they have determined many possible causes. Since the late 1800’s and early 1900’s, psychologists have

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”.

This theory creates an issue, as it only looks at nature’s impact as the root cause of phobic disorders and relishes in not accounting for environmental causes, which are posed by nurture. This aspect of nurture which is ignored can be questioned in the twin studies as although Torgersen found that identical twins who share genes are 5x more likely to share an anxiety disorder, it is unclear whether it is the nature of the genetic makeup which causes the disorder, or the nurture of the twins, as they would have both gone through the same things in their environment causing the contamination effect. This is further highlighted through the diathesis stress model formed by Di nardo et al which provides a much more

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.

The Minnesota Twin Registry started in 1983 and its goal was to establish a registry of all twins born in Minnesota from 1936 to 1955 to be used for psychological research.., T.J. Bouchard, working in conjunction with the University of Minnesota, started exploring the similarities and differences in characteristics like personality, career interests, and a variety of personal interests between identical twins who were reared apart. Research was conducted on twins from all over the world. The Minnesota Twin study gave scientists a new insight of the role of nature vs. nurture on human development and personality; it was the hope that twin studies would be able to tie genes to specific behaviors. From the study, we understand that twins who were separated at birth and raised in different families

As Joseph (2004) pointed out, however, this is not always the case. Monozygotic twins are more likely to be treated in a similar way, encounter more similar environments, and be to be thought of as ‘the twins’ rather than two separate individuals. This, in turn, can lead to ‘identity confusion’ and so potentially a higher concordance rate amongst monozygotic twins. Therefore Joseph argues that the greater concordance rate seen in monozygotic twins than in dizygotic twins is a result of the differing attitudes and environments experienced by the two types of twins.

Throughout history, across all cultures, people have been fascinated with twins. In addition to interest in the close emotional ties and biological similarities that twins may share, reports of special twin languages and twin extrasensory perception (ESP) help people to explore ideas of what it means to be human. How similar or different are they to each other? How important are genes and environment for development? Because identical twins share all of their genes, it is the environment—rather than genetics—that accounts for any differences between them.

Social Phobia, also called social anxiety disorder (SAD), is one of the most common, but misconstrued mental health problems in society. According to the Anxiety and Depression Association of America (ADAA), over 15 million adults suffer from the disorder. First appearing in the DSM-III as Social Phobia, and later in the DSM-IV as Social Anxiety Disorder, this newly established disorder denotes afflicting stress and anxiety associated with social situations (Zakri 677). According to James W. Jefferson, two forms of Social phobia exist: specific and generalized. Specific social phobia indicates anxiety limited to few performance situations, while generalized indicates anxiety in all social situations (Jefferson). Many people often interchangeably link this disorder to shyness––a personality trait. However, although they have striking similarities, the two are divergent. To begin with, SAD has an extensive etiology ranging from multiple factors. Furthermore, symptoms of various aspects accompany SAD. Moreover, SAD has detrimental impacts affecting quality of life. Lastly, SAD has numerous methods of treatment. Social Phobia is prevalent in both women and men beginning at the onset of puberty (ADAA).

Social Anxiety Disorder or social phobia, is the third largest mental health care problem in the world. (Stein, 2010) National statistical surveys carried out in 2002 in the United Kingdom suggest that the prevalence rates for social phobias among young people in the UK were around 4%. (National Statistics, 2002)

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.

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

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.