Dana Do’s: All the Validities in ABA, Explained
PTB founder Dana Meller helps connect each of the validities to the validity of this explanation.
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C.8 Evaluate the validity and reliability of measurement procedures.
Dana Do’s: Breaking Down a BCBA®/BCaBA® Mock Exam Question About Operational Definitions
PTB founder Dana Meller answers a follower request for an explanation around a mock question posted on social about the impact of an incomplete operational definition on trustworthy measurement.
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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.
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Dana Do’s: How to Define the Markers of Trustworthy Measurement
PTB co-founder goes into the three factors that define trustworthy measurement– “validity”, “reliability” and “accuracy”. But what’s the difference between each? Dana explains.
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Dana Do’s: Understanding All the Types of Validity in ABA
ABA has multiple types of validity—internal, external, social, and measurement validity—but how do you keep them straight? PTB founder Dana Meller can help.
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Dana Do’s: Why IOA Math Should Not Intimidate You
PTB co-founder takes some of the fear out of the interobserver agreement math with simple tips that can help narrow your discrimination.
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Interobserver agreement (IOA)
A measurement of the degree to which two or more observers report the same values when observing and collecting data for the same behaviors/events.
Measurement artifact
Data that represents an unwarranted and misleading picture of behavior because of how it was measured, typically a product of time-sampling, limiting measurement scales, or poorly scheduled measurement periods.
Measurement bias
When an observer’s measurement is influenced by an expectation or belief they hold rather than what actually occurred.
Observer drift
When observers collecting data have a shift/drift in how they interpret the operational definition of the target behavior that affects the validity of their data.
Observer reactivity
When an observer’s data collection or performance is influenced by the awareness that they are being monitored and evaluated.
Reliability
Measurement is trustworthy when the degree to which repeating a measurement procedure under the same conditions produces the same result.