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
Sample Response: In productive study groups, members participate actively in the discussions, use good listening skills, and follow group guidelines.
Julia, Ernesto y Pablo are waiting for it (the bus).) is a correct statement.
<h3>What is the statement about?</h3>
The statement Julia, Ernesto y Pablo están esperándolo is a response to a previously given question which is Julia, Ernesto and Pablo are waiting for him in English.
Julia, Ernesto y Pablo are waiting for it the bus is also known to be the response to the first question and as such the tenses are correct.
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Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.