ABSTRACT
This chapter addresses the parameters of replication that student researchers will want to attend to in the design, implementation, and evaluation of their research efforts and those of others. M. Sidman, in Tactics of Scientific Research, provided the definitive word regarding replication, in which he discussed two types of replication: direct replication and systematic replication. His differentiation of direct replication, and its importance for evaluating the reliability of findings, and systematic replication, and its importance for evaluating the generality of findings, has provided behavior analysts with a framework for evaluating research. Two types of direct replications: intra-subject direct replication and inter-subject direct replication. Sidman discusses a variation of inter-subject replication that he labels "inter-group" replication. As a criterion of reliability and generality, intersubject replication is a more powerful tool than intergroup replication. Replication is clearly a canon of applied behavioral science, and is discussed frequently, but executed less frequently.
