The term 'Standard Score' is a type of statistical measure used to compare scores from different tests. It is also known as a z-score, which is the number of standard deviations a given score is from the mean. The PAR solution for this crossword is the three letter acronym for 'Percentile Rank', which is a measure of how an individual's score compares to the scores of other individuals in a group. Percentile Rank is expressed as a percentage and indicates the percentage of people who scored lower than the individual.