The answer is: nature and nurture
Nature and nurture is the ongoing debate in psychological field on whether humans development is mostly influenced by environmental or genetic factors.
Twins often used in such experiment because they have same genetic material. This means that if they were separated, the researchers could analyze whether the environment where they grow up resulted in radical difference within the children's development.
Answer core benefit.
Explanation
Sitting in a theater to watch a movie, one feels excited, scared, emotional and happy during those hours spent in watcing the movie. One is transferred to a world away from reality and you enjoy every moment of it. As one walks out of the theater you feel rejuvenated de-stressed and realize that for those hours you had atleast forgoten about the troubles of day to day life.
Answer:
a. Instrumentation
Explanation:
Instrumentation can be explained as the tools or means through which the investigators tries or attempts to measure items of interest in the process of data collection. This can also be described as the process of constructing research tools or instruments such as interview and questionnaire, for gathering data on a study.
In this case, Dr Bloedorn readily have the participants that she will use for her research and a calorimeter which will be used to measure the calories of the participants, this means that she need not to worry about instrumentation, that is , all the tools she will use to carry out her research.