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What are characteristics of correlational research?
(2 variables are observed to see whether there is a relationship) observation in a natural state, no manipulation of variables, does not explain the cause and effect mechanism of the relationship.
What are advantages relative to correlational research?
can determine causation
What are advantages versus non-random assignment?
advantage is to distribute the participant characteristics evenly between 2 groups. can also be used to control environmental variables.
What is random sampling?
Every person or entity in the population has an equal chance of being selected for the sample: to get approximation of representative sample
What is a representative sample?
Sample has individuals who vary on attribute n same way as in population, difficult to get a representative sample because we don’t know distribution of all relevant variables in the populations, “not what researchers typically do” ( A subset of a statistical population that accurately reflects the members of the entire population.)
What are independent variables
is the variable that is manipulated by the experimenter
What are dependent variables?
is the variable that is observed for changes in order to asses the effect of the treatment.
What is a confounding variable?
an unexpected and uncontrolled variable that upsets the experiment so you can no longer say with certainty that the change in the independent variable did in fact cause the change in the dependent variable.(is an extraneous variable in astatistical model that correlates (directly or inversely) with both the dependent variable and the independent variable.)
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