The test is comprised of three sections: Mathematics, Critical Reading and Writing. Each section is worth 80 points to a maximum composite score of 240 points. The PSAT's are graded on a similar scale to SATs. Each section is scores on a scale from 20 to 80 points. Lower scores are possible but discarded. Each section in the SAT is graded on a scale of 200 to 800 points which allows the PSAT score to predict a comparable SAT score. Unlike the new SAT the new PSAT does not include higher level math, or an essay in the writing section. The sum of three scores is known as selection index and is used, along with four general criteria of eligibility, to determine selection in the National Merit Scholarship competition.