multiple baseline design
an experimental approach in which two or more behaviors are assessed to determine their initial, stable expression (i.e., baseline) and then an intervention or manipulation is applied to one of the behaviors while the others are unaffected. After a period, the manipulation is then applied to the next behavior while the remaining behaviors are unaltered, and so forth until the experimental manipulation has been applied in sequential fashion to all of the behaviors in the design. In successively administering a manipulation to different behaviors after initial behaviors have been recorded, a multiple baseline design allows for inferences about the effect of the intervention.