Type1 Physical absence with a psychological presence Typical examples of “Leaving without Goodbye”: ＊Catastrophic: Missing, disappearance, distress, abduction, lost without a trace, etc. ＊More common: Divorce, adoption, immigration, etc. Type２ Psychological absence with a physical presence Typical examples of “Goodbye without Leaving”: ＊Catastrophic: Alzheimer’s disease and other dementias, brain injury, addiction to drugs or alcohol, depression, etc. ＊More common: Absence of a loved one, homesick, workaholic, etc. Note) “Catastrophic” refers to a tragic situation in which many huge changes occur in one’s environment.