Abstract: Examined within-person and between-group changes in trait anxiety and locus of control as measured on the State-Trait Anxiety Inventory and the Multidimensional Health Locus of Control Scale. Ss were 27 men and 30 women participating in a 21-day residential training program in neurolinguistic programming. Significant within-person decreases in trait-anxiety scores and increases in internal locus of control scores were observed as predicted. Results confirm the effectiveness of neurolinguistic programming in lowering trait anxiety and increasing the sense of internal control. (PsycLIT Database Copyright 1993 American Psychological Assn, all rights reserved)