Why one UCAT mock can't pin your score

Run the same student through a hundred mocks and see how far the scores spread.

Section
Mock length

580 to 720middle 90% of 100 mocks

300500700900
Each dot is one mock. The blue line is the score this student's true level gives.

  1. Same student, same level: 44 questions per mock still give scores from 570 to 750.

  2. More questions per mock narrows the spread; four times the questions halves it.

  3. The real test has this too: UCAT's 2025 figures put the standard error of a Verbal Reasoning score at about 39 points.

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How this works

Method

  1. Made-up student: each question is right with the same chance, independently. Real questions vary, so real mocks spread at least this much.
  2. Each mock's share right is turned into a scaled score with our UCAT calculator's sum.
  3. The standard error is the candidate-weighted average of the five 2025 forms' scaled standard errors of measurement, as UCAT published them.

Sources

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