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A researcher manipulates the __________ variable(s), measures the effect on the _________ variable(s), and tries to control the ____________ variable(s).

Why is it important to use operational definitions in research?

Which of the following is NOT a method to minimize experimenter expectancies?

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A researcher wants to compare younger children and older children on their ability to solve a puzzle. This IV is considered a(n) _________ independent variable.

“Hunger is defined as 24 hours of food deprivation.” This is an example of a(n) _______ definition.

What type of statistics is used to organize and describe the characteristics of a collection of data?

A variable always has

Which of the following is NOT one of the techniques to control extraneous variables?

A web designer is investigating the user-friendliness of three website homepages. Participants interact with the three different layouts. They then report on their user satisfaction.   Which type of independent variable (IV) is being used in this study?