Which memory tasks would H. M. (Henry Molaison) and others with his type of memory deficit have trouble completing

H. M and people who were same in memory to H. M were suffered many factors such partial loss of their memory. H. M was not able to repeat his conversation whatever he did with people after the injury. Due to this he lost the ability to remember the things. He suffered from retrograde amnesia in which he lost the memory after the accident.

He did not remember even the routes of train, bus and other local routes that he remember before the injury.

He did not remember if someone just or recently called him for any task. He did not remember the name of a person who called him and why he called him.