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:
There are 5 numbers
Explanation:
First, the number must be a whole number and divisible by 4.
20^2 is 400.
And there are 4, 8, 12, 16 ,20; 5 number divisible by 4.
23^2 is already 529.
The next number divisible by 4 is 24 which is over 500.
So there are 5 numbers. They are 16, 64, 144, 256, 400.
Okay i will! hehe! lollllll