The document defines individual differences as variations among people in terms of physical and psychological characteristics. Physical differences include attributes like height, skin color, and hair type. Psychological differences refer to mental abilities, intelligence levels, attitudes, emotions, and motor skills which vary between individuals. Individual differences arise due to hereditary, cultural, educational, socioeconomic, age, and occupational factors. Understanding these differences helps nurses provide personalized care to patients and educators tailor their teaching styles to different learners.