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Mean and SD for ratings on idiom properties and for performance on knowledge question.
| Idiom property | Mean (SD) |
|---|---|
| Subjective Frequency (scale 1–5) | 3.41 (1.39) |
| Familiarity (scale 1–5) | 3.08 (1.35) |
| Usage (scale 1–5) | 2.17 (1.30) |
| Transparency (scale 1–5) | 3.08 (1.28) |
| Imageability (scale 1–5) | 3.36 (1.33) |
| Objective idiom knowledge (in %) | 85.48 (35.22) |
