The groundbreaking second edition of Nonlinear Contingency Analysis gives practitioners a powerful framework for understanding and shaping behavior without coercion.

Nonlinear contingency analysis (NCA) builds on Israel Goldiamond’s classic work, offering a systematic method for analyzing how multiple contingencies interact. Rather than eliminating behavior, NCA equips one to construct new repertoires and expand options for clients, students, and communities.

Inside, you’ll find:

• Current applications with autistic children and their families.
• An expanded treatment of emotion in clinical practice.
• An introduction to constructional exposure therapy (CET).
• A new chapter on genuine consent, assent, and degrees of freedom for verbal and nonverbal individuals and even animals.

With updated models, real-world case studies, and expanded applications, this edition is more than theory: it’s a practical guide to ethical, socially meaningful, and freedom-enhancing practice.

T. V. Joe Layng, PhD, a pioneering behavior scientist, has dedicated over five decades to research, clinical innovation, and educational technology applications, significantly advancing nonlinear contingency analysis and the constructional approach.

Paul Thomas Andronis, PhD, is a leading experimental behavior analyst whose landmark discovery of contingency adduction and decades of academic leadership helped shape modern behavioral science and its applied impact.

R. Trent Codd, III, EdS, BCBA, is a clinician-scholar integrating behavior analysis and cognitive-behavioral therapy. He has extensive experience in clinical practice, training, supervision, and authorship.

Awab Abdel-Jalil, PhD, BCBA-D, is an applied researcher at Upstate Caring Partners, and an educator with scholarship/presentations on nonlinear contingency analysis, constructional approaches, and assent-based interventions.