Applied Behavior Analysis, Research Designs help

Part 1: Select one of the following research designs: ABAB Reversal Design; Multiple Baseline Design; Alternating Treatments Design; or Changing Criterion Design. Provide a brief overview of your selected research design and discuss types of situations in which the design would work best and those situations in which the design would not work.

Part 2: When evaluating graphic displays, what do the terms “level,” “trend,” and “variability” mean? How do these terms relate to the use of visual analysis to determine the effectiveness of an intervention?