Which of the following is NOT a type of observational recording system?

The choice that is identified as NOT a type of observational recording system is behavior modification. This term refers to a broader approach within behavioral psychology that involves techniques to change behaviors, often using reinforcement strategies and interventions. It is not classified as a specific observational recording method.

On the other hand, frequency count, interval time sampling, and duration recording are specific observational recording systems used to systematically track and measure behaviors. Frequency count records how often a behavior occurs, while interval time sampling involves observing whether a behavior occurs during specified time intervals. Duration recording keeps track of how long a particular behavior lasts. These methods are essential for gathering quantitative data on behaviors in various settings, such as in music therapy, to inform treatment decisions and progress evaluations.