Explanation:
Contamination can have undesirable consequences in real experiments, some of them are related to the feelings that may arise in the research participants, the contamination bias reduces the differences between the research groups, and can cause a comparison between the treatments of each different group, the which can generate conflicts and rivalries on the part of groups that consider themselves to be inferior to others. These contamination-related problems can significantly interfere with the research results.
Answer:
A.
Explanation:
Its A because the law was to stop slavery
Answer:
folloow mw tiktokjonathan_dion for a free cookie
Explanation:
Answer: Task analysis.
Explanation: Human Factors psychology is defined as the study of how workers interact with the work tools and how to create and enhance those to optimize productivity, health and safety of workers. For instance, <u>Human Factors psychologists research on the area of task analysis when they study what steps people take in order to successfully wash their hands before performing a surgery.</u>
Numismatics is the study or collecting of coins medals and paper money.