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Definition
| 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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| 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 acceleration or decelerating (multiplying or dividing). |
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| A unit of time (e.g., per week, per month) in which celeration is plotted on a Standard Celeration Chart. |
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| It 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, and rate per decade). |
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Definition
| A simple tally of the number of occurrences of a behavior. The observation period, or counting time, should always be noted when reporting count measures. |
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Definition
| Any operant whose response rate is controlled by a given opportunity to emit a response. Each discrete response occurs when an opportunity to respond exists. |
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Definition
| A measure of the total extent of time in which a behavior occurs. |
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Definition
| Measurement procedure for obtaining a tally or count of the number of times a behavior occurs. |
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Definition
| Any operant behavior that results in minimal displacement of the participant in time and space. It can be emitted at nearly any time; it is discrete, it requires minimal time for completion, and it can produce a wide range of response rates. Examples: number of words read during a 1-minute counting period, the number of hand slaps per 6 seconds, and the number of letter strokes written in 3 minutes. |
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Term
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Definition
| 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 diving the number of responses recorded by the number of standard units of time in which observations were conducted; used interchangeably with rate. |
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Definition
| A measure of temporal locus; defined as the elapsed time between two successive responses. |
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Definition
| 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. Responses meeting those criteria are measured and reported by one or more fundamental or derivative measures such as frequency, duration, or latency. Sometimes called amplitude. |
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Term
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Definition
| 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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Term
| measurement by permanent product |
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Definition
| A method of measuring behavior after it has occurred by recording the effects that the behavior produced on the environment. |
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Term
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Definition
| A measurement method in which the presence or absence of behaviors are record are recorded at precisely specified tim intervals. |
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Term
| partial-interval recording |
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Definition
| A time sampling method for measuring behavior in which the observation period is divided into a series of brief time intervals (typically from 5 to 10 seconds). The observer records whether the target behavior occurred at any time during the interval. It is not concerned with how many times the behavior occurred during the interval or how long the behavior was present, just that it occurred at some point during the interval; tends to overestimate the proportion of the observation period that the behavior actually occurred. |
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Term
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Definition
| A ratio (i.e., a 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;typically expressed as a ratio 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). It represents a proportional quantity per 100. |
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Term
| planned activity check (PLACHECK) |
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Definition
| A variation of momentary time sampling in which the observer records whether each person in a group is engaged in the target behavior at specific points in time; provides a measure of "group behavior". |
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Term
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Definition
| 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 number of standard units of time in which observations were conducted; used interchangeably with frequency. The ratio is formed by combining the differential dimensional quantities of count and time (i.e, count time). Ratios formed from different dimensional quantities retain their dimensional quantities. Synonymous with frequency in behavioral measurement. |
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Definition
| 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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Definition
| 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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Definition
| Refers to the fact that every instance of behavior occurs during some amount of time; one of the three dimensional quantities of behavior from which all behavioral measurements are derived. |
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Term
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Definition
| Refers to the fact that every isntance of behavior occurs at a certain point in time with respect to other events (i.e., when in time behavior occurs can be measured); often measured in terms of response latency and inter-response time (IRT); one of the three dimensional quantities of behavior from which all behavioral measurements are derived. |
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Term
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Definition
| A measurement of the presence or absence of behavior within specific time intervals. It is most useful with continuous and high-rate behaviors. |
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Definition
| The physical form or shape of a behavior. |
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Definition
| 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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Term
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Definition
| A time sampling method for measuring behavior in which the observation period is divided into a series of brief time intervals (typically from 5 to 15). At the end of each interval, the observer records whether the target behavior occurred throughout the entire interval; tends to underestimate the proportion of the observation period that many behaviors actually occurred. |
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