Answer: Experimenter bias.
Explanation: Experimenter bias is the condition which describes a person as a part of experiment who is influencing the outcome of the experiment so that the desired or preferred results can be obtained.Experimenter bias is also known as research biasing.
The example mentioned in the question where Brian is conducting the study with sharing his views with the participants that he expects girls should perform better than boys in the experiment is example of experimenter bias.
The actual experiment should have been conducted without any thought sharing or acknowledgement which would have produced unbiased outcomes.But according to Brain's study, the expectations are conveyed ,therefore it will influence the result of the experiment as it becomes biased.
The correct answer is :
An upper body performance test known as the sitting medicine ball throw (SMBT) is used to assess muscular health in older people. The aim of this study was to assess the test-retest reliability and validity of the SMBT in older women. In this study, 35 ladies (mean age: 75.15 + 6.39 years) took part. Over the course of three sessions, subjects completed SMBT trials utilising standard ball masses (SMBT4 lb and SMBT3 kg). On the first day, instruction in the SMBT and chest press 1 repetition maximum (CP1RM) was given. The tests were repeated on day 2, but data were recorded. On day 3, SMBT was retested, and then chest press peak power (CPPP) values between 30 and 80 percent of CP1RM were assessed.
The CPPP and SMBT4lb (r = 0.775, p 0.001) and SMBT3kg (r = 0.734, p 0.001) exhibited significant relationships (p 0.05), and the SMBT distance showed expected ageing reductions (r = -0.724 to -0.626, p 0.001), proving its validity. There was found to be high reliability between testing days, and Bland-Altman plots revealed few locations that deviated significantly from the bounds of agreement. The SMBT is a valid and incredibly trustworthy instrument that health providers can use to track upper body muscular power deficits in older women and enhance treatment regimens.
To learn more about validity and reliability refer the link:
brainly.com/question/14124062
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Answer:
Steven F. Greul writes that a study published in June 2010 concluded that playing a violent video game for only 30 minutes caused a decrease in brain activity in a region of the frontal lobe that is known to be important in the ability to inhibit impulsive behavior.
Explanation:
Steven F. Gruel is an attorney who defends the idea that violent video games shouldn't be played by children. According to Gruel, studies have proven the existence of a connection between violent video games and impulsive behavior. Playing a violent video game, concluded one of those studies, for 30 minutes is already enough to reduce brain activity in the frontal lobe. However, more recent studies defend the idea that violent games have only a short-term influence over children.
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