For each of the following scenarios, describe the confounding that the careless researcher forgot to eliminate.a.A researcher tested whether students...

In this scenario, the
researcher forgot to remove the confounding variable of what the lecture covered. The researcher
changed two variables in each experimental condition instead of just one. In one experimental
condition, the researcher used slides when speaking about the biochemistry of emotion. In the
other condition, the researcher used handouts when speaking about the biochemistry of memory.
The independent variable, in other words, was the type of presentation (slide or handouts), and
the dependent variable was the students' performance on a quiz. The students could have
performed better on the quiz following the slides because the topic of emotion was more
interesting to them or the professor knew the subject matter better than in the other
experimental condition (among other reasons).

To test which format helps
students more, the researcher would need to present the material to two matched groups. in one
group, the researcher would use slides, and in the other group, the researcher would use
handouts.The groups in each condition would be matched for several variables. For example, they
would be the same ages and genders and have similar grade point average, etc. Then, the
researcher could determine whether the slides or handouts were better tools for learning, as the
material would be exactly the same.