Types of loss include actual loss (recognized by others), perceived loss (experienced by one person but cannot be verified by others), and anticipatory loss (experienced before the loss actually occurs)
Sources of loss include loss of an aspect of oneself, loss of an object outside oneself, separation from accustomed environment, and loss of a loved or valued person
Types of grief responses include anticipatory grief (experienced in advance of the event), disenfranchised grief (unable to acknowledge the loss to other people), and unhealthy grief (pathologic or complicated grief)