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Author Question: Describe and differentiate the three methods to control extraneous variables. What will be an ... (Read 28 times)

j.rubin

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on: Jun 19, 2018
Describe and differentiate the three methods to control extraneous variables.
 
  What will be an ideal response?

Question 2

Random error can drastically affect the average performance for a group.
 
  a. True
  b. False
  Indicate whether the statement is true or false


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frre432

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Reply #1 on: Jun 19, 2018
Answer to Question 1

Extraneous variables can be controlled by holding them constant, or by matching them across treatment conditions, or by randomizing them across treatment conditions. If a variable is held constant, then it is the same for all treatment conditions and cannot be responsible for differences between treatments. Similarly, if a variable is matched across treatments, then it is the same for all treatment conditions and cannot be responsible for differences between treatments. Finally, if a variable is randomized across treatments, then it should not change systematically from one treatment to another, and it should not be responsible for differences between treatments.

Answer to Question 2

False


j.rubin

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Reply 2 on: Jun 19, 2018
YES! Correct, THANKS for helping me on my review

at

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Reply 3 on: Yesterday
Wow, this really help

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