Types of Measurement
Recording each time a behavior happens
Frequency
Checking if a behavior occurs at the end of an interval
Momentary time sampling
The visual display of behavior data
Graph
When two observers record the same behavior and compare data
Interobserver Agreement (IOA)
A therapist counts how many times a child hits during session.
Frequency
Number of responses per unit of time
Rate
Recording if a behavior happens at any time during the interval
Partial interval recording
The horizontal line of a graph showing time
X-axis
IOA helps ensure data is this
Reliable and accurate
A therapist measures how long a tantrum lasts.
Duration
How long a behavior lasts
Duration
Recording if a behavior occurs for the entire interval
Whole interval recording
The vertical line of a graph showing behavior
Y-axis
IOA is usually expressed as a _____?
Percentage
A therapist measures how long it takes a student to start work after instruction.
Latency
Time between the instruction and the response
Latency
Best method for measuring behaviors that happen very frequently
Discontinuous measurement
The line connecting data points on a graph
Data path
When observers agree on behavior occurrence and nonoccurrence
A therapist records behavior only if it happens during the whole interval.
Whole interval recording
Every occurrence of the behavior is recorded
Continuous measurement
A limitation of discontinuous measurement
It may overestimate or underestimate behavior
A phase change line shows this
When a condition or intervention changes
Why behavior analysts collect IOA data
To ensure data accuracy and reliability
A therapist checks behavior exactly when the timer goes off.
Momentary time sampling