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What is correlation design?
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How can correlations vary?
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psych quiz 2 - P.2

Psychology quiz 2 terms, correlation design and more

QuestionAnswer
What is correlation design? Examine how two variables are related
How can correlations vary? Correlations vary from - 1 to +1 and can be positive, negative, and none (zero)
How are correlations depicted? Depicted in a scatterplot
What are illusionary correlations? Perception of a statistical association where none exist
What is correlation vs causation? Just because two things are related, does not mean that one causes another.
What are three possible explanations for correlation vs causation? A causes B, B causes A, C causes both A and B
What are experiments? The only way to be certain if one thing is causally related to another is with an experimental design
What is an independent variable? The variable researchers manipulate in an experiment to
What is a dependent variable? The thing the researcher is measuring
What is random assignment? Participants are assigned to different treatment groups on the basis of chance alone
What needs to happen before confident in experiment results? Experiment must be repeated or replicated before complete confidence can be placed in conclusion
What makes a study an experiment? Random assignment of participants groups
What is the experimental (test) group? Receives the manipulation (3 cups of coffee)
What is the control group? Does not receive manipulation (3 cups of decaf)
What is the manipulation of the independent variable? The thing you think is the cause (caffeine in coffee (regular vs decaf))
What is the manipulation of the dependent variable? It measures if manipulation had an effect
What is the confound? Makes independent variable effects uninterpretable (we had people play jenga at different times of the day (morning vs evenings))
What are cause and effect? Possible to infer with random assignment and manipulation of independent variables and experiments have high internal validity
What is the placebo effect? Improvement resulting from the mere expectation of improvement
What is the nocebo effect? Harm resulting from the mere expectation of harm
Created by: josie_d
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