Presents the Relationship Closeness Induction Task (RCIT), a structured self-disclosure procedure for the induction of relationship closeness in the laboratory. The RCIT consists of 29 questions, which become progressively more personal, and requires 9 min to administer. The validity of the RCIT has been previously demonstrated in several experiments, in which it fostered high levels of relationship closeness, induced high levels of group entitativity, and allowed participants adequate privacy and comfort. The RCIT affords the researcher with several advantages, such as theory-testing potential, avoidance of methodological pitfalls, and convenience. (PsycINFO Database Record (c) 2012 APA, all rights reserved)