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Health, 31.10.2019 21:31 kayranicole1

Studying development—summary and selected excerpts from "sources of human psychological differences: the minnesota study of twins reared apart" thomas j. bouchard, jr., david t. lykken, matthew mcgue, nancy l. segal and auke tellegen monozygotic (identical) and dizygotic (fraternal) twins who were separated early in life and raised in different environments provide the simplest and most powerful method for studying the impact of nurture (environment) and nature (genetics) on human characteristics. monozygotic (identical) twins share the same genetic makeup. if they are raised in different environments, researchers are able to clearly examine the impact of environment, since genetics are identical. sample "more than 100 sets of twins or triplets from across the united states and united kingdom have participated in the minnesota study of twins reared apart since it began in 1979." "the sample consists of adult twins, separated very early in life, reared apart during their formative years, and reunited as adults." methods of study participants completed approximately 50 hours of medical and psychological assessment. this included: four personality trait inventories three occupational interest inventories two mental ability assessments (one individual and one administered as a group) intelligence quotient (iq) test, administered by separate examiners life history interview psychiatric interview sexual life interview cultural and social questionnaires independent assessment of twins’ environments that may have impacted psychological development findings 70% of iq differences between twins were traced to genetic factors twins were about equally similar on most physiological and psychological traits no significant differences in cognitive abilities or personality were identified conclusions "the study of these reared apart twins has led to two general and seemingly remarkable conclusions concerning the sources of the psychological differences-behavioral variation-between people: (i) genetic factors exert a pronounced and pervasive influence on behavioral variability, and (ii) the effect of being reared in the same home is negligible for many psychological traits." "psychologists have been surprised by the evidence that being reared by the same parents in the same physical environment does not, on average, make siblings more alike as adults than they would have been if reared separately in adoptive homes…on multiple measures of personality and temperament, occupational and leisure time interests, and social attitudes, monozygotic twins reared apart are about as similar as are monozygotic twins reared together."

in one paragraph, describe the research methods used in this study and why you believe they were chosen. be sure to use key terms such as cross-sectional research, longitudinal research, data collection, observation, case studies, questionnaires, and experimentation, as they apply. your answer should include at least two of these key terms.

in one paragraph, discuss the research findings. does the study support genetics (nature) or environment (nurture) as a stronger influence on human development? use information from the article and the lesson to support your response.

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