Nominal, Ordinal, Interval, Ratio Ch. 5
Students are ranked from 1st to 10th in their graduating class.
ordinal
What does a correlation tell us?
The strength and the direction of the relationship.
The consistency and stability of a measure.
reliability
A developmental research design used to study changes by observing the same participants at different points in time, measuring the same dependent variable each time
Longitudinal Design
The ethics committee for human participants
Institutional Review Board
Participants choose their marital status: single, married, divorced, widowed.
nominal
When one variable increases and the other decreases, the correlation has this direction.
Negative
One indicator of internal consistency is the correlation of the total score on one half of the test with the total score on the other half.
split-half reliability
When the same participants are observed in each group, we call this
Repeated measures or within subjects design.
Humans who volunteer in a research study.
Participants
Number of therapy sessions a client attends over a semester.
Ratio
A correlation coefficient of 0.00 indicates this type of relationship.
No relationship
This measures whether a test actually assesses the construct it claims to measure.
construct validity
Name two things that may be missing in quasi-experimental design that exist in experimental design?
A comparison group, lack of randomization
An organization that provides guidelines for citing sources. You have the 7th edition
American Psychological Association
Temperature measured in Fahrenheit during a stress experiment.
Interval
When both variables increase or decrease together, the correlation has this direction.
positive
The extent to which the results of a study can be generalized to other people, settings, or times.
external validity
What type of design is an experiment where we measure after the treatment?
Post-test only design
The key advantage to random assignment is that it makes _____________________ about the same in each group.
individual (or group) differences
Time (in seconds) it takes someone to respond to a stimulus.
Ratio
When the relationship between variables isn’t a straight line but a curve instead, this type of pattern is present.
Curvilinear relationship
A threat to internal validity that occurs when participants drop out of a study over time, also known as ________.
attrition
What do we call this type of design when different participants are observed in each group
Independent group design or between subjects design.
What type of experimental design is it to measure before and after a treatment?
pretest-posttest design