Psychology: Developmental Barchart Our 3-panel (6-page) guide provides a detailed review of a principal area of mental health care: developmental psychology. A perfect resource for nursing students or those already in the field who want to brush up on their skills, this guide covers the key concepts, skills, theories and their proponents all essential knowledge for the successful psychology student. Jam-packed text is enhanced by graphic elements and tables are used to provide ease of use.