Answer:
Lighting significantly affects performance
Explanation:
In this study, Ellen took two groups and applied the same IQ test to both of them. The only variable that changed between the groups was the level of lighting in the room. The first group was placed in a room with very bright lights and the second group was placed in a room with more normal lighting.
Individuals in the first group did better in the IQ test and she found that the difference between the two scores was statistically significant.
We say that a result is <u>"statistically significant" when it is not likely to occur randomly but rather is likely to be attributable to a specific cause.</u>
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So we can say that <u>the better performance in the first group tests were not likely to occur randomly but it can be attributable to a specific cause. </u>
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<u>Since the only variable that was different between the groups was the lightning, we can conclude that lighting significantly affects performance. </u>
I think Is letter A, I hope is good
Answer:
They are conductin a comparative study.
Explanation:
Comparative research is a methodology used to compare results accross different populations. In this case, Brad and Greg have chosen two different countries, United States and Ireland, in order to compare results and verify if Piaget's theory can be generalized and taken as universal. Comparative research allows researchers to analize variables that vary from one culture to another and that are a result of social and cultural environments that corresond to a specific time and space.
