ABA reversal design
A type of within-subject experiment in which behavior is observed before (A) and after (B) an experimental manipulation. The original (A) condition is restored, sometimes followed again by the experimental (B) condition.
First- or secondhand reports of personal experience.
In a within-subject experiment, a period of observation (often designated A) during which no attempt is made to modify the behavior under study.
An experimental design in which the independent variable is made to vary across two or more groups of subjects. Also called between-treatment or group experiment.
Detailed study and description of a single case. Usually used in clinical settings.
In a between-subjects experiment, those subjects not exposed to the independent variable.
A graphic record of behavior, each point of which reflects the total number of times a behavior has been performed as of that time. (C’. cumulative recorder.)
An apparatus (or software) that records every occurrence of a behavior, thereby producing a cumulative record. (C’. cumulative record.)
The variable by which the outcome of an experiment is measured. It is expected to vary with (to depend on) the independent variable.
A study in which the researcher attempts to describe a group by obtaining data from its members.
A research design in which the researcher measures the effects of one or more independent variables on one or more dependent variables.
In a between-subjects experiment, those subjects exposed to the independent variable.
See between-subjects experiment.
In an experiment, the variable that the researcher controls. The independent variable is usually expected to affect the dependent variable.
A procedure for reducing extraneous differences among subjects in between-subjects experiments by matching those in the experimental and control groups on specified characteristics, such as age, sex, and weight.
A definition that specifies the operation (procedure) by which a term will be measured.
A research design in which the independent variable is made to vary at different times for the same subject. (Thus, each subject serves as both an experimental and control subject.) Also called single-subject or single case experiment.