In a recent study, each member of two groups of people, Group A (composed of persons sixty-five to seventy-five years old) and Group B (composed of college students), was required to make a telephone call to a certain number at a specified time  The time when each call was initiated was recorded electronically  Group A proved far better at remembering to make a telephone call precisely at a specified time than did Group B  There were fourteen lapses in Group B but only one lapse in Group A
Clearly, at least one type of memory does not suffer as a person ages
Both groups had unrestricted access to telephones for making the required calls.