Scoring
Who Grades CASPer? How Raters Score Your Answers
CASPer is graded by trained human raters, not by AI or by the programs you apply to. Each scenario on your test goes to a different rater, who sees only your anonymized responses. Raters are paid contractors, recruited from the same country as the programs, who must pass training and a calibration check before they score live tests.
Who the CASPer raters are
Acuity Insights, the company behind CASPer, recruits raters as on-demand contractors. Its assessment overview says human raters score each test and that raters are selected to reflect the population of the country where your program is located. Its country article adds that applicants are rated by a pool of raters from the same country, which is one reason you need a separate test for each country you apply in.
A current Acuity rater job posting says the role is open to people from a variety of backgrounds. You do not need to be a doctor or an admissions officer. The posting does exclude people planning to apply to a program that uses CASPer in the next two to three years.
How a rater scores your test
Acuity's scoring explanation describes the process:
- One scenario per rater. Each rater is assigned a specific scenario and given background knowledge and instructions for it.
- Many applicants, same scenario. The rater reviews responses from many applicants to that one scenario. The job posting says raters compare responses with the overall pool and follow scoring guidelines.
- Both questions, scored separately. The same rater reviews both questions in a scenario with full context, but scores each question on its own.
- No repeat raters. No rater scores the same applicant more than once.
The ratings are then averaged across your test and standardized against your applicant pool. Our CASPer z-score guide explains that last step.
What raters can and cannot see
Raters see
- The scenario and its two questions
- Your typed answers or your video responses
- Guidance for scoring that scenario
Raters do not see
- Your name, age or photo
- Your grades, MCAT or application
- Your answers to other scenarios
Acuity says responses are anonymized before rating, and raters are instructed to focus on substance rather than grammar or spelling. Its spelling and grammar article confirms that typos and small grammatical mistakes will not affect your score. Video responses do show your face and voice, but Acuity says raters are trained to evaluate the content of your responses, not your appearance. For more on what is scored, see what CASPer actually scores.
How raters are trained and checked
Acuity's rater training article lists several layers of quality control:
- Paid, self-paced training on the assessment criteria, how to apply them consistently and how to avoid bias, with exercises and knowledge checks.
- Calibration and certification. Raters must score accurately against benchmark ratings before rating live responses.
- Annual recertification to stay current with any changes to scoring criteria.
- Speed checks. Raters who move through responses too quickly are automatically blocked, and their previous ratings from that session are reviewed for possible re-rating.
- Inter-rater reliability monitoring to check how consistently raters score the same responses.
These checks reduce inconsistency, but no human rating system is perfect. Independent studies have raised questions about score differences between demographic groups; our CASPer validity research summary covers what has been found.
Can you get your CASPer test re-scored?
No. Acuity's re-scoring article says CASPer tests cannot be re-scored. Because each scenario is rated by a different person, your overall score already combines several independent views, and one rater's first impression cannot spill over into the rest of your test.
If something went wrong during the test itself, such as a video that failed to upload, that is a technical problem, not a scoring dispute, and it has its own reporting process. See CASPer technical issues. If you are unhappy with your result, the realistic options depend on retake rules and future cycles; see can you retake CASPer.
How to become a CASPer rater
If you searched for the rater job itself, here is the process described in a current Acuity posting for New Zealand raters. Postings for other countries may have different eligibility rules, so check the one for your country.
| Step | What it involves |
|---|---|
| Application | An online form checks basic eligibility, such as citizenship and residence in the country being rated. |
| Mini-Casper and reading test | Candidates take a shortened CASPer and a reading comprehension test, taking up to about 25 minutes. |
| Video conversation | Successful candidates have a 20-minute one-to-one call with the rating team. |
| Paid training | An eight-module online program covering rating principles, quality assurance and implicit bias, to be finished within 5 business days. |
| Calibration and certification | Raters must show consistent agreement with benchmark ratings before scoring live tests. |
The posting describes the work as flexible, remote and on demand, with no guaranteed minimum amount of work, a quarterly schedule to plan around, and monthly payments. It asks for strong written communication and the same soft skills CASPer looks for: communication, self-awareness, professionalism and empathy.
What this means for how you answer
Knowing how raters work suggests a few practical habits:
- Treat each scenario as a fresh start. A new rater sees it, so a weak scenario does not follow you.
- Make your reasoning visible. A rater compares you with many other answers to the same prompt. A specific decision with reasons stands out from generic statements.
- Answer both questions. Each is scored separately, so a blank second question costs you a rating.
- Do not write for a reader who knows you. The rater has only your answer, so include the context they need.
For a structure that helps, see our CASPer answer structure guide.
Frequently Asked Questions
Is CASPer graded by AI?+
No. Acuity says human raters score each CASPer test. Each scenario is reviewed by a different trained rater.
Do medical schools grade my CASPer answers?+
No. Acuity's raters score the test, and programs receive the resulting standardized score. Each program decides how to use it in admissions.
Can a CASPer rater see my name or photo?+
Acuity says responses are anonymized and raters do not see personal information such as your name, age or photo. Video responses show you speaking, but raters are trained to evaluate content, not appearance.
Can I appeal or re-score my CASPer result?+
No. Acuity says CASPer tests cannot be re-scored, because each scenario is already rated by a different person. Technical problems during the test are handled through a separate reporting process.
Who can become a CASPer rater?+
Acuity recruits on-demand contractors from the country being rated, from a variety of backgrounds. A current posting requires citizenship and residence in that country, a computer, strong written communication and no plans to apply to a CASPer program in the next two to three years.
Sources and scope
Checked October 21, 2026 against Acuity's scoring explanation, rater training article, re-scoring article, assessment overview, country article, spelling and grammar article and a current rater job posting. Job details come from one country's posting and may change. CasperCoach is independent of Acuity Insights and has no inside access to rating guidelines.