IVs, DVs, and Operational Definitions

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Psychology

University/Undergrad

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9 Terms

1
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What is an independent variable?
variable that the experimenter manipulates or through which the experimenter groups participants
2
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What are the levels of an IV?
the various conditions/groups of an IV
3
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What is the minimum number of levels of an IV we must have and why?
2 levels; because you need something to compare
4
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What is a dependent variable?
the outcome variable; the one that’s affected by the IV
5
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What is a manipulated IV?
it is controlled by the experimenter and allows causality to be inferred
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What is a non-manipulated IV?
pre-existing traits of participants; can’t infer causality
7
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What is the ceiling effect?
range restriction at the high end of the scale
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What is the floor effect?
range restriction at the low end of the scale
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Why is it important to operationally define our variables?
it allows people to replicate experiments and also for researchers to come to common conclusions