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24 Cards in this Set
- Front
- Back
accuracy
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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
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believeability
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the extent to which the researcher convinces herself and others that the data is trustworthy and deserve interpretation
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calibration
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any procedure use to evaluate the accuracy of a measurement system and when sources of error are found, to use the information to correct or improve the measurement system
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continuous measurement
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measurement conducted in a manner such that all instances of response classes of interest are detected during the observation period
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discontinuous measurement
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measurement conducted in a manner such that some instances if the response class of interest may not be detected.
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exact-count- per interval IOA
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the percentage of total intervals in which two observers recorded the same count.
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indirect measurement
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occurs when the behavior that is measured is in some way different from the behavior of interest
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interobserver agreement (IOA)
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the degree to which two or more independent observers report the same observed values after measuring the same events
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interval-by-interval IOA
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an index of the agreement between observers for data obtained by interval recording or time sampling measurement, calculated for a given session or measurement period by comparing two observers recordings of the occurrence or non occurrence in each observation interval and dividing the number of intervals of agreement by the total number of intervals and multiplying by 100
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mean count per-interval IOA
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the average percentage of agreement between counts reported by two observers in a measurement period compromised of a series of smaller counting times; more conservative measure of IOA than total count IOA
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mean duration-per occurence IOA
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an IOA index for duration per occurrence data; also more conservative and usually more meaningful assessment of IOA for total duration data calculated for a given session or measurement period by computing the average percentage of agreement of the duration reported by two observers for each occurrence of behavior.
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measurement bias
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nonrandom measurement error; a form of inaccurate measurement in which the data consistently overestimate or underestimate the true value of an event.
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naive observer
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an observer who is unaware of the study's purpose sand or the experimental conditions in effect during a given phase or observation period.
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observed value
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a measure produced by an observation and measurement system.
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observer drift
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an unintended change in the way an observer uses a measurement system over the course of an investigation that results in measurement error
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observer reactivity
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influence on the data reported by an observer that results from the observers awareness that others are evaluating the data he reports.
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reliability
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refers to the consistency of measurement, the extent to which repeated measurement of the same event yields the same values
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scored interval IOA
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an inter-observer agreement index based only on the intervals in which either observer recorded the occurrence of the behavior; calculated by dividing the number of intervals in which two observers agreed that the behavior occurred by the number of intervals in which either or both observers recorded the occurrence of behavior and multiplying by 100
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total count IOA
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the simplest indicator of IOA for event recording data. compares the total count recorded by each observer per measurement period. Calculated by dividing the smaller of the two observers counts by the larger count and multiplying by 100
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total duration IOA
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a relevant index for total duration measurement; computed by dividing the shorter of the two duration reported by the longer duration and multiplying by 100
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trial by trial IOA
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an IOA index for discrete trial data based on comparing the observers counts ( 0 or 1) on a trial by trial or item by item, basis; yields a more conservative and meaningful index of IOA for discrete trial data than does total count IOA
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true value
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a measurement accepted as a quantitative description of the true state of some dimensional quantity of an event as it exists in nature.
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un-scored interval IOA
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An interobserver agreement index based only on the intervals in which either observer recorded the nonoccurrence of the behavior; calculated by dividing the number of intervals in which two observers agreed that the behavior did not occur by the number of intervals in which either or both observers recorded the nonoccurrence of the behavior and multiplying by 100
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validity
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the extent to which data obtained from measurement are directly relevant to the target behavior of interest and to the reason(s) for measuring it.
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