Table 2.

Choice behavior.

Group	Smell (mean across all trials ± SD)	Smell (total in first trial)	Side (mean across all trials ± SD)	Side (total in first trial)
Experimental	Smell 1 (neutral) 44% ± 16%	Smell 1 (neutral) n = 18	Left 50% ± 30%	Left n = 26
	Smell 2 (fear) 46% ± 17%	Smell 2 (fear) n = 23	Right 40% ± 29%	Right n = 15
	No choice 10% ± 18%		Dogs showing bias (>80%) 45%
	Preference Smell 2 > Smell 1 2% ± 27%		Preference for one side over the other 47% ± 32%
Control	Smell 1 (neutral) 44% ± 13%	Smell 1 (neutral) n = 7	Left 35% ± 27%	Left n = 7
	Smell 2 (neutral) 50% ± 16%	Smell 2 (neutral) n = 13	Right 59% ± 29%	Right n = 13
	No choice 6% ± 11%		Dogs showing bias (≥80%) 36%
	Preference Smell 2 > Smell 1 6% ± 26%		Preference for one side over the other 47% ± 36%

Summary of dogs’ choice behavior in the experimental and control group for a certain side or smell in the first trial and across all trials.