Table 2.

Mean results presented as sensitivity, specificity and accuracy in percent, including ± standard deviation (SD), calculated from 21 randomized and double-blind experimental searches carried out on trees and untreated wooden pallets in a semi-field condition between 11 to 20th of May 2020 at the University of Southeast Norway including both invasive and native wood borers. A dog`s response to a scent sample could be either; TP true positive response, FP false positive response, TN true negative response and FN false negative response. CR total number of correct responses, ICR total number of incorrect responses, and TOT R total number of responses.

Dog	TP	FP	TN	FN	CR	ICR	TOT R	Sensitivity (%) ± SD	Specificity (%) ± SD	Accuracy (%) ± SD
Akira	45	7	81	4	126	11	137	92.8 ± 8.3	92.8 ± 6.0	92.6 ± 5.9
Chilli	40	4	85	8	125	12	137	82.8 ± 22.3	95.4 ± 0.9	91.8 ± 5.9
SUM	85	11	166	12	251	23	274	–	–	–
MEAN	–	–	–	–	–	–	–	87.8 ± 16.5	94.1 ± 4.2	92.2 ± 5.5