JCE Reports: Reading and Interpreting Results Data
What reports contain
JCE Reports covers the documents produced after marking: results slips, centre summaries, subject reports, grade distributions, and statistical moderation output. Candidates must understand the vocabulary: raw mark, weighted component mark, grade boundary, cumulative percentage, moderation, and comparability. Know the difference between a norm-referenced statement (how a cohort performed relative to others) and a criterion-referenced statement (what a candidate demonstrated against syllabus objectives).
Traps in questions
Report questions punish loose reading. Common traps include: (a) treating a grade boundary as a fixed percentage across sessions when boundaries are set per session; (b) confusing a centre's mean score with a national mean; (c) reading a small-cohort percentage as if it were a reliable trend; (d) assuming a subject report names individual candidates when it is aggregated and anonymised; and (e) conflating moderation (adjusting marks for comparability) with remarking (re-scoring a script).
Rule of thumb
Before answering, identify three things: the unit of analysis (candidate, centre, subject, cohort), the comparison base, and whether the figure is a count or a percentage. Most distractors fail one of these.
Worked example
A centre report shows 8 candidates, 2 at Grade A, so 25% at A, while the national figure is 12%. A question asks whether the centre outperformed nationally. With n = 8, two candidates is a very small base; the correct response notes the percentage but cautions that the cohort is too small for a stable comparison, and that the subject report, not the centre report, is the source for cohort-level commentary.