D&D Rules Cyclopedia (1991), Ch. 10, page 127:
AD&D First Edition DMG pg 84. Though speaking about character actions, such is generally the result of roleplaying by the player choosing the course of action for and behavior of the character:
"...The gaining of sufficient experience points is necessary to
indicate that a character is eligible to gain a level of experience, but the
actual award is a matter for you, the DM, to decide.
Consider the natural functions of each class of character. Consider also the
professed alignment of each character. Briefly assess the performance of
each character after an adventure. Did he or she perform basically in the
character of his or her class? Were his or her actions in keeping with his or
her professed alignment? Mentally classify the overall performance as:
E - Excellent, few deviations from norm = 1
S- Superior, deviations minimal but noted =2
F - Fair performance, more norm than deviations =3
P- Poor showing with aberrant behavior =4
Clerics who refuse to help and heal or do not remain faithful to their deity,
fighters who hang bock from combat or attempt to steal, or fail to boldly
lead, magic-users who seek to engage in melee or ignore magic items
they could employ in crucial situations, thieves who boldly engage in
frontal attacks or refrain from acquisition of an extra bit of treasure when
the opportunity presents itself, "cautious" characters who do not pull their
own weight - these are all clear examples of a POOR rating..."
