SAFMEDS
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| Measurement | the process of assigning numbers and units to particular features of objects or events.
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| Repeatability | Refers to the fact that a behavior can occur repeatedly through time (i.e.. behavior can be counted); one of the three dimensional quantities of behavior from which all behavioral measurements are derived
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| Temporal Extent | Refers to the fact that every instance of behaviour occurs during some amount of time; one of the three dimensional quantities of behavior from which all behavioural measurements are derived
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| Temporal Locus | Refers to the fact that every instance of behaviour occurs at a certain point in time with respect to other events (i.e.. when in time behaviours occurs can be measured); often measured in terms of response latency and inter response time (IRT);
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| TL con't
one of the three dimensional quantities of behavioural measurements are derived.
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| Count | simple tally of the number of occurrences of a behaviour.The observation period, or counting time, should always be noted when reporting count measures
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| Rate (or Frequency) | A ratio of count per observation time; often expressed as count per standard unit of time (e.g.. per minute, per hour, per day) and calculated by dividing the number of responses recorded by the
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| number of standard units of time in which observations were
conducted; used interchangeably with frequency.
Rate 2
The ratio is formed by combining the different dimensional quantities retain their dimensional quantities.
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| Rate 3
Rate and frequency in behavioural measurement are synonymous terms.
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| Free Operent | Any operant behaviour that results in minimal displacement of the participant in time and space. A free operant can be emitted at nearly and time; it is discrete, it requires minimal time for completion, and it can produce a wide range of response rates.
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| Examples in ABA include (a) the number of words read during a 1-minute counting period (b) the number of hand slaps per 6 seconds (c) letter strokes written per 3 mins
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| Discrete Trial | Any operant whose response rate is controlled by any given opportunity to emit the response. Each discrete response occurs when an opportunity to respond exists (Contrast free operant)
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| Celeration | The change ( acceleration or deceleration) in rate of responding over time; based on count per unit of time (rate); expressed as a factor by which responding is accelerating or decelerating (multiplying or dividing);
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| displayed with a trend line on a Standard Celeration Chart. Celeration is a generic term without specific reference to accelerating or decelerating rates of response.
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| Celeration Trend Line | The celeration trend line is measured as a factor by which rate multiplies or divides across the celeration time periods (e.g.. rate per week, rate per month, rate per year, rate per decade)
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| Celeration Time period | A unit of time (eg. per week, per month) in which celeration is plotted on a Standard Celeration Chart.
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| Duration | A measure of the total extent of time in which a behaviour occurs
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| Response Latency | A measure of temporal locus; the elapsed time from the onset of a stimulus (e.g.. task direction, cue) to the initiation of a response
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| Interresponse Time | A measure of temporal locus; defined as the elapsed time between two successive responses
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| Percentage | A ratio ( ie. proportion) formed by combining the same dimensional quantities such as count (number/number) or time ( duration/duration; latency/latency); expressed as a number of parts per 100;
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| typically expressed as a ration of the number of responses of a certain type per total number of responses (or opportunities or intervals in which such a response could have occurred). A percentage presents a proportional quantity per 100.
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| Trials-to-Criterion | A special form of event recording; a measure of the number of responses or practice opportunities needed for a person to achieve a pre established level of accuracy or proficiency
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| Topography | The physical form or shape of a behaviour
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| Magnitude | The force or intensity with which a response is emitted; provides important quantitative parameters used in defining and verifying the occurrence of some response classes.
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| Mag 2
Responses meeting those criteria are measured and reported by one or more fundamental or derivative measures such as frequency, duration, or latency. Sometimes call amplitude.
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| Event Recording | Measurement procedure for obtaining a tally or count of the number of times a behaviour occurs
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| Time Sampling | A measurement of the presence or absence of behaviour within specific time intervals. It is most useful with continuous and high-rate behaviours.
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| Whole-Interval Recording | A time sampling method for measuring behaviour in which observation period is divided into a series of brief time intervals (typically 5-15 seconds)
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| W-I R2
At the end of each interval, the observer records whether the target behaviour occurred throughout the entire interval; tends to underestimate the proportion of the observation period that many behaviours actually occurred
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| Partial-Interval recording | A time sampling method for measuring behaviour in which the observation period is divided into a series of brief intervals (5-15 seconds). The observer records whether the target behaviour occurred at any time during the interval.
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| Partial interval recording is not concerned with how many times the behaviour was present, just that it occurred at some point during the interval; tends to overestimate the proportion of the observation period that the behaviour actually occurred.
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| Momentary Time Sampling | A measurement methods in which the presence or absence of behaviours are recorded at precisely specified time intervals.(Contrast Interval recording)
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| Planned Activity Check (PLACHECK) | A variation of momentary time sampling in which the observer records whether each person in a group is engaged in the target behaviour at specific points in time; provides a measure of "Group behaviour"
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| Measurement by Permanent Product | A method of measuring behaviour after it has occurred be recording the effects that the behaviour produced on the environment
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| Artifact | An outcome or result that appears to exist because of the way it is measured but in fact does not correspond to what actually occurred
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