Adaptation Refers to the changes in operant responding due to the repeated presentation of a particular antecedent stimulus. D-2 Distinguish between internal and external validity. Related Content Dana Do's: How to Decipher the Many Forms of Validity It's particularly meaningful to be able to tell validity, social validity, internal and external validity apart. PTB co-founder Dana Meller has some tips to do just that.Let's Break Down a BCBA® Mock Exam Question: Identifying Measurement Confounds in Experimental Design PTB co-founder Dana Meller breaks down a BCBA® mock exam question that explores the difference between measurement confounds and subject confounds, how they relate to threats to internal validity in ABA research. Refer to BCBA® Task List (5th ed.) Section D-2: Distinguish between internal and external validity.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.Systematic replication An experimental replication of a previous study in which the researcher intentionally changes one or more features of a prior experiment.Confounding variables Any uncontrolled factors known or suspected to exert influence on the dependent variable during an experiment that is unexpected and not considered in planning. Hint: Think unpredictable events that can … Adaptation Read MoreExtraneous variables Any aspect of the environment that must be held constant to prevent unplanned environmental variations during experimentation, usually something the experimenter is aware of and for which they do their … Adaptation Read MoreInternal 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 … Adaptation Read MoreExternal validity The extent to which the results of a study can be generalized to other settings, behaviors, or subjects.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.Maturation Refers to the changes in a subject over the course of the study that result from natural growth and development.Warm-up effects Refers to when initial response rates in baseline are weaker due to a subject needing to get warmed up.Practice effects Refers to an improvement in responding from the opportunity to practice a behavior, specifically during prolonged baseline measurement periods.Bootleg reinforcement Reinforcement that is accessed without meeting the response requirements of the contingency.Experimental Validity: The Relationship between Behavior Change & Independent Variables PTB co-founder explains the different types of validity in ABA. Refer to BCBA® Task List (5th ed.) Section D-2: Distinguish between internal and external validity.
