A cross-sectional design comparing three different ages would require three separate groups of participants.
a. True
b. False
Indicate whether the statement is true or false
When the tests (or observers) used on the posttest and the pretest differ, there is a(n) ____ threat.
a. history
b. mortality
c. instrumentation
d. regression
Subtracting the Donders' A reaction time from the Donders' C reaction time tells us how long response selection takes.
Indicate whether the statement is true or false
A differential research design comes closer to being a true experiment that other similar designs.
a. True
b. False
Indicate whether the statement is true or false
When taking the pretest affects how participants do on the posttest, there is a(n) ____ threat.
a. history
b. maturation
c. instrumentation
d. testing
In a Donders' C reaction task there is more than one stimulus but only one response.
Indicate whether the statement is true or false
A researcher in Mississippi measured visits to the school counselor for a group of students for three weeks in the spring. In the fall, immediately after a major hurricane, the researcher again measured the students' counselor visits to see if there had been any change. This researcher is using an interrupted time-series design.
a. True
b. False
Indicate whether the statement is true or false
When some event other than the program occurs at the same time and affects the outcome of a study, there is a(n) ____ threat.
a. history
b. maturation
c. instrumentation
d. testing
An interaction occurs when more than one independent variable is manipulated in an experiment and the results depend upon the combination of these variables.
Indicate whether the statement is true or false
The time-series design is an example of the quasi-experimental research strategy.
a. True
b. False
Indicate whether the statement is true or false
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