Social Skills Training (SST) can significantly contribute to people s development, both personally and professionally. People s attitudes toward participating in an SST reveal how much they see this training favorably, and along with subjective norms and perception of control, can explain the behavior of effectively taking part in an SST. The objective of this study was to elaborate and search for evidence of the validity of four scales measuring: behavioral intention, subjective norms, perception of control and attitude towards taking part in an SST. Participants were 808 Brazilian adults, with mean age 32.3 years, and 64 percent being women. Our results showed a one-factor instrument with satisfactory psychometric indices. The attitude toward SST correlated positively with the intention of taking part in an SST, with five of the six dimensions of basic values, and with general motivation to learn. Subjective norms and perception of control were positively correlated with behavioral intention. And behavioral intention correlated positively with motivation to learn. Evidence of validity was gathered to corroborate the suitability of the instrument to measure the construct. Also, it was found that women and people who had already participated in an SST showed higher levels in their attitude towards participating in an SST. The study points to the possibility of using these instruments in organizational and academic environments.