_____ is a measure of memory in which retention is expressed as the percentage of time saved when material is relearned compared with the time required to learn the material originally

Depletion of the neurotransmitter acetylcholine has been implicated as a:

A) treatment of schizophrenia. B) cause of Huntington's disease. C) treatment for Parkinson's disease. D) critical factor in Alzheimer's disease.

Most adolescents engage in some lawbreaking behaviors

Indicate whether this statement is true or false.