The document describes the development of the Response to Stressful Experiences Scale (RSES), a measure of psychological resilience. It discusses what resilience is and why it is important to measure. It outlines the process of developing and testing the RSES, which resulted in a 30-item scale with 6 factors: positive outlook, spirituality, active coping, self-efficacy, meaning-making, and acceptance. The RSES was tested on over 900 military service members across branches and found to have high reliability. Ongoing research aims to further validate the RSES and explore resilience as a treatment outcome and way to build countermeasures for stress.