Human development refers to the psychosocial, physical, and cognitive development of humans. It extends to the entire lifespan of humans. Physical development of humans involves growth and changes in the brain and the body including sense organs, motor skills, health, etc. Psychosocial development involves changes in personality, social relationships, and emotions. Cognitive development involves changes in memory, language, reasoning, creativity, etc.

• Development in humans is both qualitative and quantitative.
  • Qualitative change occurs when individual progress and become different from the way they were earlier like the way an individual perceives the world, behave and think.
  • Quantitative change occurs when individuals acquire novel information and experiences like, the individuals become stronger, bigger, gain more weight or height.
  • It is concerned with the overall and progressive changes taking place in an individual including both quantitative as well as qualitative aspects.
  • It is a wide and complex process, thus there are some principles that need to be followed for a better understanding.
  • Sudden changes in development are actually the result of both qualitative and quantitative development.

  Hence, it can be concluded that human development is both quantitative and qualitative.