Sledgehammer was first performed live in 1998.
Single-subject research is a group of research methods that are used extensively in the experimental analysis of behavior and applied behavior analysis with both human and non-human participants .. experimental analysis of behavior. experimental analysis of behavior. applied behavior analysis. applied behavior analysis. Principal methods in this type of research are  : A-B-A-B designs , Multi-element designs , Multiple Baseline designs , Repeated acquisition designs , Brief experimental designs and Combined designs .. These methods form the heart of the data collection and analytic code of behavior analysis .. Behavior analysis is data driven , inductive , and disinclined to hypothetico-deductive methods .. Statistical methods have been largely ignored .