A retrospective 60-year review of Murray Sidman's Tactics of Scientific Research and some of its influence on behavior analysis.

Murray Sidman's book, Tactics of Scientific Research: Evaluating Experimental Data in Psychology, published in 1960, has been called the bible of the experimental analysis of behavior and has been a major influence on basic as well as applied research in behavior analysis. The contents of the early reviews of the book are summarized and the commemoration in The Behavior Analyst at the 30 anniversary of the book is reviewed along with Sidman's comments on updates that he would have made if he were to revise or supplement the book. Included are some later remarks by Sidman regarding specific issues in Tactics.

A Critical Review of the Support for Variability as an Operant Dimension.

There is abundant evidence that behavioral variability is more predominant when reinforcement is contingent on it than when it is not, and the interpretation of direct reinforcement of variability suggested by Page and Neuringer, Journal of Experimental Psychology: Animal Behavior Processes, 11(3), 429-452 (1985) has been widely accepted. Even so, trying to identify the underlying mechanisms in the emergence of stochastic-like variability in a variability contingency is intricate. There are several challenges to characterizing variability as directly reinforced, most notably because reinforcement traditionally has been found to produce repetitive responding, but also because directly reinforced variability does not always relate to independent variables the same way as more commonly studied repetitive responding does.

The Emergence of Bidirectional Naming Through Sequential Operant Instruction Following the Establishment of Conditioned Social Reinforcers.

Bidirectional naming (BiN) is the integration of speaker and listener responses, reinforced by social consequences. Unfortunately, these consequences often do not function as reinforcers for behavior in children with autism. Accordingly, the repertoire of BiN is also often limited in these children.

Murray Sidman: A life of giving.

Murray Sidman's contributions to the science of behavior span many areas including avoidance behavior, coercion and its effects, stimulus control, errorless learning, programmed learning, stimulus equivalence, and single-subject methodology. He was also a great mentor to many and helped shape the discipline we now call behavior analysis. In this memoriam, we briefly highlight his scholarly legacy and share some personal anecdotes.

Multiple Exemplar Training: Some Strengths and Limitations.

In successful multiple exemplar training, a set of exemplars that sample the range of stimulus and response topographies is trained, and the full range of performances results. Examples abound in experimental psychology and include abstraction and concept learning, responding to relations, identity matching, rule following, behavioral variability, responding to wh-questions, describing past events, learning sets, and continuous repertoires. Thus, behavior analysts often allude to a history of multiple exemplar training to account for different generalized performances.

Intensive Quality Assurance of Therapist Adherence to Behavioral Interventions for Adolescent Substance Use Problems.

This study was a crosscultural replication of a study that investigated therapist adherence to behavioral interventions as a result of an intensive quality assurance system which was integrated into Multisystemic Therapy. Thirty-three therapists and eight supervisors participated in the study and were block randomized to either an Intensive Quality Assurance or a Workshop Only condition. Twenty-one of these therapists treated 41 cannabis-abusing adolescents and their families.