Independent variable
In an experimental design, this is the particular aspect of the environment manipulated to assess its effects on the target behavior.
Independent variable Read More
D. Experimental Design
Independent variable (IV) confounds
Uncontrolled environmental variables that may interfere with the outcomes and/or the effectiveness of an intervention and therefore the internal validity of the experiment.
Internal validity
The extent to which an experiment strongly shows that changes in the dependent variable are a direct result of the independent variable and not the result of some other uncontrolled
Intersubject direct replication
An experimental replication of a previous study in which the researcher exactly duplicates a previous study but uses different subjects from the original study.
Intrasubject direct replication
An experimental replication of a previous study in which the researcher exactly duplicates a previous study using the same subjects as the original study.
Irreversibility
A behavior for which the effects of treatment cannot be undone. Therefore, it cannot return to a baseline level of responding when an independent variable is removed.
Maturation
Refers to the changes in a subject over the course of the study that result from natural growth and development.
5th Edition Task List
D-2 Distinguish between internal and external validity.
6th Edition TCO
D.3 Identify threats to internal validity (e.g., history, maturation).
Measurement confounds
Uncontrolled variables related to the environment, the measurement tools, or a data collector’s behavior that may interfere with the measurement of behavior and therefore impact the outcomes and/or the effectiveness
Multielement design
An experimental design in which two or more independent variables are presented in rapidly alternating succession, and the differential effects of each independent variable on the target behavior are measured.
Multiple baseline design
An experimental design in which the effect of one independent variable is measured and evaluated within and across combinations of two or more subjects, behaviors, or settings.
Multiple probe design
A variation of the multiple baseline design that uses intermittent measurement or probes instead of consecutive measures to evaluate the effect of one independent variable within and across combinations of
Multiple treatment (reversal) design
A variation of the reversal design in which multiple treatments are alternated in different phases and compared to baseline and/or each other.