Crying is a complex human behavior that is most often regarded as an irrepressible expression of pain or sorrow. Crying first appears immediately after birth, long before speaking, walking, and other forms of human behavior that exist across the lifespan. In ...

  • Loading...
locked icon

Sign in to access this content

Get a 30 day FREE TRIAL

  • Watch videos from a variety of sources bringing classroom topics to life
  • Read modern, diverse business cases
  • Explore hundreds of books and reference titles