1. understand fixed and dynamic predictors of vocational success, which may help tailor the IPS model to subpopulations. Predictors that are fixed, but may help in client selection or IPS implementation, include premorbid IQ (intelligence quotient) and previous schooling or employment (respectively). More malleable predictors, where IPS might be offered in conjunction with other interventions, include various neurocognitive abilities and recreational alcohol/drug use;