How Final Scores are Calculated

Calculating a Student’s Score

Multiple-Choice Score + Open-Response Score = Student’s Raw Score

Using a standard psychometric process, the student’s raw score is converted into a score on a scale from 200 to 400 points. A scale score of 300 is required to be successful on the OSSLT.

Why are raw scores converted to scale scores?

This process is part of a well-established statistical procedure known as "equating", which ensures results are validly comparable from one year to the next.

Does this affect the student’s outcome?

No. Converting a raw to a scale score does not change the student’s outcome. Consider that the freezing point of water is the same whether one uses a Fahrenheit or Celsius thermometer.

The Scoring Process

EQAO processes are designed to ensure accurate, fair and valid results for all students. The scoring process includes

Parents and students can be assured students’ work has been scored against the same standard and in a consistent manner across the province.

Student Anonymity

Student test booklets are identified by barcode only. To ensure anonymity during the scoring process, neither the student’s nor the school’s name appears on the booklet.

All multiple-choice responses are scanned with computer software and double- checked to ensure that every student answer has been electronically recognized.

Random Distribution

When completed test booklets are received back from Ontario schools, they are scrambled and randomly distributed among the scorers.


About 1200 scorers from across the province are gathered in the GTA for about two weeks each year to score the test. Scorers and scoring leaders must pass a qualifying test in order to participate. Scorers


Each student paper is scored with the same set of criteria and following identical scoring procedures. Scorers are trained to score consistently using

All scorers participate in two daily activities designed to refresh their training and ensure every Ontario student is assessed with a uniform scoring standard.

Multiple scoring

For scoring, student booklets are separated according to the seven booklet sections.

Student responses are automatically sent to a scoring leader or literacy expert for a third score if there is a large discrepancy in the scores assigned by the two scorers.

Monitoring for validity and reliability

Selected booklets, referred to as "validity papers", are chosen, prescored by scoring leaders and circulated blindly throughout the marking session to monitor the validity (accuracy) of scoring on a daily basis. The reliability (consistency) of each scorer is also monitored on a daily and cumulative basis.