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Identifying Appropriate Measurement Systems for Behavioral Dimensions, Study notes of Topography

Oklahoma City University (OCU)Topography

This video discusses how to identify the behavior dimension of interest and select an appropriate measurement system for evaluating the effectiveness of functional-assessment-based interventions. Behavior dimensions include frequency or rate, duration, latency, topography, locus, and force. Frequency refers to the number of responses, duration to the length of time, latency to the time between stimulus and response, topography to the shape and form, locus to the location, and force to the strength or intensity of the behavior. Uniform behaviors are best measured using event-based systems, while non-uniform behaviors require time-based systems. Event-based systems include gathering permanent products, frequency recording, and rating intensity or magnitude. Time-based systems include duration recording, interval recording, and time sampling. Data is most often reported as percentage of total intervals in which the target behavior was scored as occurring.

What you will learn

  • How do you measure uniform behaviors?
  • What are the six dimensions of behavior?
  • What are the advantages of event-based and time-based measurement systems?

Typology: Study notes

2021/2022

Uploaded on 09/12/2022

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Behavior Dimensions and Measurement Systems
In this video, we will discuss how to identify an appropriate measurement system that is aligned
to the behavior dimension of interest used in evaluating whether a functional-assessment-based
intervention is effective.
The reason we collect behavioral data is to accurately measure behavioral performance which is
necessary for many reasons including accurately measuring baseline levels of behavior as well as
objectively determining effectiveness of any intervention effort. We will use a single-case design, which
we will discuss more thoroughly in the video on Step 5: Testing the Intervention. Behavior has several
different dimensions; it is necessary to first identify the behavior dimension that is of interest before you
can select an appropriate measurement system.
Behavior has at least six dimensions, these are: frequency or rate, duration, latency, topography,
locus, and force.
Frequency refers to the number of responses in which the behavior occurred. Think count.
Frequency is the dimension of interest when you want to know how many times something occurs – such
as number of times a student answered a question correctly. Whereas rate, refers to a ratio of count, per
observation time, and is calculated by dividing the number of responses by the total observation time. So,
if I was interested in knowing the rate of correct responding, I would count the number of correct answers
on a student’s math facts sheet and divide that number by time it took that student to complete, so count
of 9 correct answers during a ten-minute work block would equal a rate of .90 per minute.
A second possible dimension is duration, or how long a behavior lasts. Duration is a good
dimension of interest when measuring a behavior that a person is engaging in for too long or for too short
of a time. For duration, you can measure the total duration of an entire observation session (for example,
the student was out of his seat for 43 minutes in a 60 min window) or duration per occurrence, (such as,
the student was out of his seat for an average of 3.07 per minute over fourteen instances).
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Behavior Dimensions and Measurement Systems

In this video, we will discuss how to identify an appropriate measurement system that is aligned to the behavior dimension of interest used in evaluating whether a functional-assessment-based intervention is effective. The reason we collect behavioral data is to accurately measure behavioral performance which is necessary for many reasons including accurately measuring baseline levels of behavior as well as objectively determining effectiveness of any intervention effort. We will use a single-case design, which we will discuss more thoroughly in the video on Step 5: Testing the Intervention. Behavior has several different dimensions; it is necessary to first identify the behavior dimension that is of interest before you can select an appropriate measurement system. Behavior has at least six dimensions, these are: frequency or rate, duration, latency, topography, locus, and force. Frequency refers to the number of responses in which the behavior occurred. Think count. Frequency is the dimension of interest when you want to know how many times something occurs – such as number of times a student answered a question correctly. Whereas rate , refers to a ratio of count, per observation time, and is calculated by dividing the number of responses by the total observation time. So, if I was interested in knowing the rate of correct responding, I would count the number of correct answers on a student’s math facts sheet and divide that number by time it took that student to complete, so count of 9 correct answers during a ten-minute work block would equal a rate of .90 per minute. A second possible dimension is duration, or how long a behavior lasts. Duration is a good dimension of interest when measuring a behavior that a person is engaging in for too long or for too short of a time. For duration, you can measure the total duration of an entire observation session (for example, the student was out of his seat for 43 minutes in a 60 min window) or duration per occurrence, (such as, the student was out of his seat for an average of 3.07 per minute over fourteen instances).

A third possible dimension, latency refers to the amount of time it took for a behavior to occur or be initiated. Latency is a good dimension when you are interested in the length of time between when a behavior is requested (stimulus) and when it actually begins (response). For example, wanting to know how long it takes a student to begin writing after the teacher explains the writing task and asks the student to begin. A fourth possible dimension, topography, refers to what a behavior looks like, or more specifically its shape and form. For example, you may be interested in the letter-writing skills of a student’s cursive or the form of one’s bat swing. A fifth possible dimension, locus, refers to where the behavior occurs, that is, its location or context. So, this may be of interest when you want to know where the behavior is or is not occurring. For example, does the child eat in the cafeteria, in the hallway, or on the playground? A final dimension, force, refers to the strength of intensity of the behavior. For example, does the child scream or speak softly? More specifically, do the child speak loudly enough to be heard from a distance of 5 ft? 20 ft? What about from across the playground?” Once the behavior dimension has been identified, it is important to select a measurement system that is well aligned to its dimension. To begin this selection process, you must first ask yourself, does the performance of the behavior take about the same length of time as every other time. If so, the behavior is uniform. Examples of uniform behavior include talking out of turn, cussing, and swearing. Nonuniform behaviors on the other hand refers to behaviors that vary in length each time. Examples of non-uniform behaviors include being off-task or wandering around the room, this information is helpful as measurement systems are derived between two groups: event-based and time-based. Event-based measurement systems tend to be well aligned for measuring uniform behaviors and include gathering permanent products , frequency recording where you count the number of times the behavior was observed in a session and convert to rate when possible, or rating the intensity or magnitude in which a behavior was performed.

(2007). You may also look at examples available on the Ci3T websites and Iris Center website, which is headquartered at Vanderbilt University in Nashville, and Claremont Graduate University in Claremont, California.