Clinical phenomena can be described in terms of multiple dimensions (parameters) of measurement. The more common dimensions include frequency, duration, magnitude (intensity), and time course of the particular problem behavior. For example, the oppositional defiant disorder (ODD) symptom "argues with adults" can be measured in terms of frequency (number of occurrences per unit of time), duration (length of occurrences), magnitude (intensity/severity of occurrences), and time course (pattern of occurrence across time). As was the case for response modes, clients can differ in terms of which dimension is most problematic (e.g., a high frequency and low intensity of arguments for one child versus a low frequency and high intensity for another child). In addition, the different dimensions of a behavior problem may only show moder ate correlations as well as be controlled by different influences. Finally, the dimensions may be impacted differentially by treatment.
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