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Difference in pre/post knowledge quiz scores by age group through sign tests.
| Age group | N | Pre median scorea | Pre IQ rangea,b | Post median scorea | Post IQ rangeab | Z | p |
|---|---|---|---|---|---|---|---|
| Younger children (8 years and younger) | 53 | 1 | 0–2 | 2 | 1–3 | −4.603 | <0.001 |
| Target group (9–13 years) | 157 | 2 | 1–4 | 4 | 2–4 | −7.035 | <0.001 |
| Older children and adults (14+ years) | 236 | 3 | 2–4 | 4 | 3–5 | −8.952 | <0.001 |
aOn the 5-item quiz, 5 represents a perfect score.
bIQ range indicates the interquartile range.
