| Abstract: | The efficacy of both frame‐of‐reference (FOR) instructions and a measure of within‐person inconsistency in predicting grade point average was investigated. The IPIP Big Five personality questionnaire was given to 329 students with generic instructions and ‘at school’ FOR instructions. The Wonderlic Personnel Test was also administered. A measure of within‐person inconsistency was created based on the standard deviations of responses to items within the same Big Five dimension. The validity of conscientiousness was greater when FOR instructions were given. The measure of within‐person inconsistency provided incremental validity over that of conscientiousness and cognitive ability. Additionally, within‐person inconsistency moderated the relationship between conscientiousness and performance for the participants without the FOR instructions. Practical implications are discussed. |
