Fundamental dimensional quantities of behavior are direct measures of a behaviors inherent properties as it occurs in time and space These are the basic irreducible units from which other measures can be derived The primary dimensional quantities include A Frequency or Count This refers to the number of times a behavior occurs Its a direct measure of how often a behavior happens B Duration This refers to the amount of time from the beginning to the end of a behavior Its a direct measure of how long a behavior lasts C Interresponse Time IRT This refers to the time between two consecutive responses specifically from the end of one response to the beginning of the next response Its a direct measure of the temporal spacing between behaviors Latency The time from the onset of a stimulus to the initiation of a response D Topography This refers to the physical form or shape of a behavior eg how a hand flap looks the specific movements involved in hitting While topography is a crucial aspect of describing behavior it is a descriptive feature rather than a dimensional quantity that can be measured along a continuum of time or count Dimensional quantities answer questions like how many how long or when whereas topography describes what the behavior looks like Other descriptive features include magnitude intensity or force of behavior and locus where the behavior occurs on the body or in space While these are important for operational definitions they are not considered fundamental dimensional quantities in the same way frequency duration latency and IRT are