Table 3 Key factors influencing laboratory warning sign Effectiveness.
From: Visual communication design in laboratory safety effectiveness and optimization of warning signs
Factor category | Key factors | Correlation with effectiveness | Statistical significance | Practical implications |
|---|---|---|---|---|
Visual design | Color contrast ratio | r = 0.78 | p < 0.001 | High contrast (> 7:1) significantly improves visibility |
|  | Pictogram size | r = 0.71 | p < 0.001 | Pictograms occupying 40–50% of sign area optimize attention capture |
|  | Signal word prominence | r = 0.65 | p < 0.001 | Bold signal words with size > 24pt increase urgency perception |
Information design | Text conciseness | r = 0.62 | p < 0.001 | Messages limited to 7–10 words improve comprehension |
|  | Information hierarchy | r = 0.69 | p < 0.001 | Clear visual hierarchy enhances information processing |
|  | Symbol standardization | r = 0.77 | p < 0.001 | Standardized symbols improve recognition accuracy by 43% |
Contextual factors | Viewing distance | r = −0.58 | p < 0.001 | Effectiveness decreases significantly beyond 4 m |
|  | Environmental lighting | r = 0.56 | p < 0.001 | Illumination > 300 lx ensures optimal visibility |
|  | Placement height | r = 0.54 | p < 0.001 | Signs at eye level (150–170 cm) optimize attention capture |
User factors | Prior training | r = 0.66 | p < 0.001 | Safety training improves warning sign effectiveness by 38% |
|  | Experience level | r = 0.48 | p < 0.01 | Domain expertise enhances hazard perception accuracy |
|  | Cultural background | r = 0.39 | p < 0.05 | Cultural symbols require consideration for international users |
