Is any event, situation, behavior, or individual characteristic that changes or varies
variable
Experimental study in which participants are not randomly assigned
quasi-experimental
This type of method typical uses statistics and other descriptives to present data
quantitative
These variables influence the strength of the relationship between variables
moderator
Information is typically measured directly from teachers, parents, counselors, or students about their own attitudes and beliefs
self-report
The variable that is manipulated and has two levels
independent
Relationships are studied by observing variables of interest, includes predictors
non-experimental
This type of method uses interviews and questionnaires to collect data
qualitative
Set of factors used to predict an outcome
predictor
This type of measures rate things such as heart rate, brain waves, and stress level
physiological
Any variable extraneous to the independent and dependent variable
third or confounding
Relationships are studied through direct manipulation and control of variables and participants are randomly assigned
experimental
This approach uses both quantitative and qualitative methods for collecting data
mixed-methods
This variable explains the relationships between variables
mediator
The researcher develops a tool (measurement) to observe the quality of children's peer relationships
behavioral or direct
The outcome variable
dependent
The type design that "the third variable problem" is most likely to occur
non-experimental
This type of data collection uses past historical records
archival research
In a non-experimental design there is no independent variable, instead they are called
predictors
Another name for a rating scale
Likert-type scale
The measurable definition of a variable
operational
This type of design is the highest quality
experimental
This type of data collection typically includes the use of pre-determined questions either individually or in groups.
interviews
The relaionship between variables is weak or strong (strength)
moderator
Participants complete a questionnaire on their depressive symptoms
self-report