Murray Sidman: fostering progress through foundational choices
Sidman’s roadmap—kind, functional, data-led—is still the clearest guide for ethical, forward-moving ABA.
01Research in Context
What this study did
Law et al. (2021) looked back at Murray Sidman’s career. They asked: which choices moved the field forward?
The paper is conceptual, not a lab study. It traces Sidman’s big turns—like refusing to use punishment and pushing steady single-case baselines.
What they found
The authors show Sidman’s rulebook: measure what matters, keep procedures kind, let data guide next steps.
Following these choices, ABA gained tools such as errorless teaching and stimulus-equence classes.
How this fits with other research
Johnson et al. (2020) set the stage. Their earlier tribute covered the same landmarks, so Law et al. (2021) zooms deeper into the decision points rather than retelling the whole life story.
Holth (2021) and Branch (2021) both re-examine Sidman’s 1960 text Tactics of Scientific Research. While they stress reproducible graphs, Law et al. links those tactics to ethical moves—like skipping punishment—showing method and morals travel together.
Johnston (2025) widens the lens. He tracks how Pennypacker carried the measurement torch through the Strategies and Tactics books. Reading Law first gives you Sidman’s why; Johnston then shows how the next generation built the how.
Why it matters
If you run single-case sessions, cite Sidman’s rules before you change a line on the graph. Ask: is my measure functional, kind, and clear? If a procedure drifts toward punishment, remember Sidman walked away from it—and the field grew. Teach your supervisees these forks in the road so they learn to choose progress over shortcuts.
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02At a glance
03Original abstract
The contributions of Murray Sidman to the field of behavior analysis have helped to put the field on a progressive path. In this paper we describe three areas as examples, drawn from the larger set of his notable contributions: the analysis of stimulus equivalence in a way that has fostered a behavior-analytic approach to derived stimulus relations and symbolic meaning; the observation and measurement of individual behavior through time; and his stance against punitive applied methods. In each of these areas Sidman was a dedicated behaviorist, avoiding appeals to mentalistic or transcendental forces, opposing hypothetical mediational accounts, and taking a functional and contextual approach. Clarity of assumptions was at the heart of Sidman's effective scientific practices and there is no reason to think that those same assumptions will not carry us further, as evidence mounts in support of these views on psychological research and practice.
Journal of the Experimental Analysis of Behavior, 2021 · doi:10.1002/jeab.640