The FAIT is a simple assessment tool that helps staff working with people with intellectual disabilities to determine the level of emotional development of the distressed individual, thereby allowing for an intervention to be provided at the right level within an emotionally nurturing environment. The FAIT tool enables identification of the stage of emotional development at which the person’s development has become arrested; therefore, it becomes possible to work out what kind of interventions will be appropriate to address their emotional needs. Individuals who follow this manual will be able to effectively allocate a stage to the person they are assessing and be able to design an appropriate intervention, following up with a reassessment as the intervention progresses.