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However, the researchers neglected to include into their research the effects of extrafamilial factors (friends, peers, teachers, etc.) on the cognitive skills of these children. If these factors were not overlooked, the research may have proven that the environment does indeed influence cognitive development. Without this research, as it stands now, it is concluded that the greatest influence on cognitive development is solely attributed to genetics. In light of this particular perspective, the article is incomplete. On the other hand, with the limited experimentation of the research, the article is very accurate and effective. The scientists recorded their information onto graphs, and the testing was in a controlled environment. The explanation of the experiment was very thorough. Imagine an experiment in which a scientist decides to separate identical twins at birth an put them in different environments. What would the result be? Recently, a similar issue has surfaced. In the article, "Nature Clones," Jill Neimark focuses in on twins that are separated at birth and reunited in their later years. These twins have since then been under evaluation. One particular pair, Barbara Herbert and Daphne Goodship, have bee
Phobias are thought to be caused by traumas, but the Minnesota Study on twins offered contrary data. Twins often share phobias, and more often than not if one twin harbors an irrational fear, the other does too, if her childhood was not marred by a traumatic experience. For example, the results of Plomin's experiments are clearly plotted on graphs. In addition, because adoptative parents are usually carefully observed, the child has the ability to grow up in a safe, non-stressful environment. Upon meeting, both wore cream colored dresses and brown velvet jackets. " Many scientists believe that cognitive-motivational development is due to the nature aspect. "Nature, Nurture, and Cognitive Development from One to Sixteen Years: A Parent-Offspring Adoption Study. In another study, adolescents of age twelve score better on intelligence tests if given positive infant care, than do children who were neglected as infants (Myers 84). One twin might be less frightful than the other, but usually both shared the phobia (Bouchard, 1998). On the other hand, in the United States, 90% of infants walk by fifteen months (Myers 86). Washington: Hemisphere Publishing Co. " Psyscological Science 8 (1997): 442-47Plomin, Robert and McClearn, Gerald E.
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