Lecture 6
The factor of interest being studied to see if it will influence behavior.
What is IV (independent variable).
A sample that accurately reflects the population.
What is a representative sample?
This design compares different groups of participants.
What is a between-subjects design?
The tendency for participants to alter behavior because they know they are in a study.
What is the Hawthorne effect?
This statistic measures the strength of a relationship between two variables.
What is Pearson’s r?
A study's ability to determine a cause-and-effect relationship.
What is internal validity?
The type of reliability measured by administering the same test twice.
What is test-retest reliability?
A method to control for order effects in within-subjects designs.
What is counterbalancing?
The bias introduced by experimenters’ expectations.
What is experimenter bias?
The type of validity concerned with how well a test measures what it is intended to measure.
What is construct validity?
The difference between predictive and concurrent validity.
What is that predictive validity forecasts future outcomes, while concurrent validity relates to other measures at the same time?
The design that combines cross-sectional and longitudinal approaches.
What is a cohort-sequential design?
The difference between manipulated and subject variables
What is that manipulated variables are controlled by the researcher, while subject variables are pre-existing characteristics of participants?
The four types of measurement scales.
What are nominal, ordinal, interval, and ratio?
The main issue with longitudinal studies.
What is participant attrition?
The extent to which a study's results apply to real-world settings.
What is external validity?
The difference between probability and non-probability sampling.
What is that probability sampling ensures each population member has a known chance of selection, while non-probability sampling does not.
This design measures the same participants multiple times.
What is a within-subjects design?
The experimental setup where neither the researcher nor participants know the condition assignments.
What is a double-blind procedure?
A study without random assignment but still involving manipulation.
What is a quasi-experiment?