Overall length of the path that Porcellio scaber walked within the 3 h of observation. In a free-choice experiment, isolated or paired animals could select between soil contaminated with pyrethrin and uncontaminated soil. Key: box: 25th, 50th, and 75th percentile; whiskers: value ≤ 1.5 IQR; o – outlier: 3 IQR ≤ value > 1.5 IQR; + – extreme: value > 3 IQR; ↓ – significantly lower than control, p < 0.05; * – significant difference between isolated and paired animals, p < 0.05.