Parametric Analysis: An experiment designed to discover the differential effects of a range of values of an independent variable.
Data: the results of measurement, usually in quantifiable form; in applied behavior analysis, it refers to measures of some quantifiable dimension of a behavior.
Trend: The overall direction taken by a data path. It is described in terms of direction (increasing, decreasing, or zero trend), degree (gradual or steep), and the extent of variability of data points around the trend. Trend is used in predicting future measures of the behavior under changing conditions.