Answer:
reliability; validity
Explanation:
According to your text, scores on the Myers-Briggs Type Indicator change over time and scores do not relate to other measures of personality. The clauses in this quotation question the MBTI's reliability and its validity respectively.
Reliability : This is consistency across time which is (test-retest reliability), across items i.e (internal consistency), and across researchers (interrater reliability).
Validity ; This is the extent to which the scores actually represent the variable they are intended to. Validity has to do with judgement based on various types of evidence.
