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The technique to improve internal validity is D) Addition of a control group.
<h3>What is
internal validity?</h3>
Internal validity serves as the study which bring about the establishment of a trustworthy cause-and-effect relationship that can be found in treatment and an outcome.
it should be noted that Internal validity also helps to eliminate alternative explanations , hence, The technique to improve internal validity is D) Addition of a control group.
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COMPLETE QUESTOIN:
Which of the following is a technique to improve internal validity ____________?
A) Experimenter expectancy
B) Participant bias
C) Use of a confederate
D) Addition of a control group
Answer:
Bullet List and Highlights
Explanation:
Bullet list: Bullet Lists always used to work for me when I would be writing notes and you can always label each bullet point after a topic so you can find which one you're looking for.
Highlights: You can write down the main points of the Passage and highlight the main points of the list you made and make sure you study the highlighted lines first and the normal ones second.
The way that D is characterized by Alger in the given excerpt from the passage is that; He is Indifferent
<h3>What is the Inference from the passage?</h3>
The complete question is as seen in the brainly link attached.
From the given passage, we see that D doesn't really dislike dirt because he doesn't think that it's important to wash off dirt.
From D's behavior above, we can say that he is indifferent to the customs of his culture because most people in that culture will wash themselves to get rid of the dirt but he doesn't think it is important like the culture thinks.
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