| Term | Definition |
|---|
| accuracy | The extent to which observed values, the data produced by measuring an event, match the true state, or true values, of the event as it exists in nature |
| believability | The extent to which the researcher convinces herself and others that the data are trustworthy and deserve interpretation |
| calibration | Any procedure used to evaluate the accuracy of a measurement system and, when sources of error are found, to use that information to correct or improve the measuring system |
| continuous measurement | Measurement conducted in a manner such that all instances of the response class(es) of interest are detected during the observation period |
| direct measurement | Occurs when the behavior that is measured is the same as the behavior that is the focus of the investigation |
| discontinuous measurement | measurement conducted in a manner such that some instances of the response class(es) of interest may not be detected |
| exact count-per-interval IOA | The percentage of total intervals in which two observers recorded the same count |
| indirect measurement | Occurs when the behavior that is measured is in some way different from the behavior of interest |
| interobserver agreement | The degree to which two or more independent observers report the same observed values after measuring the same events |
| interval-by-interval IOA | = (number of intervals of agreement / total number of intervals) * 100% |
| mean count-per-interval IOA | The average percentage of agreement between the counts reported by two observers in a measurement period comprised of a series of smaller counting times |
| mean duration-per-occurrence IOA | equals average percentage of agreement of the durations reported by two observers for each occurrence of the target behavior |
| measurement bias | a form of inaccurate measurement in which the data consistently overestimate or underestimate the true value of an event |
| naive observer | An observer who is unaware of the study's purpose and/or the experimental conditions in effect during a given phase or observation period |
| observed value | A measure produced by an observation an measurement system |
| observer drift | Any unintended change in the way an observer uses a measurement system over the course of an investigation that results in measurement error |
| observer reactivity | influence on the data reported by an observer that results from the observer's awareness that others are evaluating the data he reports |
| reliability | Refers to the consistency of measurement, specifically, the extent to which repeated measurement of the same event yields the same values |
| scored-interval IOA | = (number of intervals of agreement) / (intervals in which either or both observers recorded occurrence) * 100% |
| scored-interval IOA | IOA index recommended for behaviors that occur at low rates |
| total count IOA | = (smaller of two observers' counts / larger of counts) * 100% |
| total duration IOA | = (shorter of two durations reported by observers / longer duration) * 100% |
| trial-by-trial IOA | An IOA index for discrete trial data based on comparing the observers' counts (0 or 1) |
| true value | A measure accepted as a quantitative description of the true state of some dimensional quantity of an event as it exists in nature |
| unscored-interval IOA | = (number of intervals of agreement on non-occurrence) / (intervals in which either or both observers recorded non-occurrence) * 100% |
| unscored-interval IOA | IOA index recommended for behaviors that occur at high rates |
| validity | The extent to which dta obtained from measurement are directly relevant to the target behavior of interest and to the reason(s) for measuring it |
Combine with other sets
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