Two scales, Perceived Work Demand (PWD) and Perceived Family Demand (PFD), are developed and their scores validated using three diverse samples. The scales are of particular interest in the work-family conflict (WFC) area and provide needed clarification in predicting WFC. Scale development procedures were followed, and dimensionality, internal consistency, discriminant validity, and predictive validity results are discussed. The results provide support for both perceived work and family demand scales.© 2007 Sage Publications.