| C PM2.5 | Concentration of PM2.5 (μg/m3) |
| ES | Effect size |
| RP | Relative performance |
| SV AQ | Satisfaction vote of air quality |
| z | The scores and reciprocals of finish times |
| z′ | The standardized value of scores and reciprocals of finish times |
| α | Rate of performance change |
| β | The constants in different cases |
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