Fig 1.
One of the containers placed under the four upside down ceramic pots, placed at approximately one-meter intervals, is baited with 30–32 grams of raw meat. The owner is leading a wolf along the pots.
Fig 2.
The different types of lids used for baiting in the five levels of difficulty. Each hole was 1 cm in diameter.
Fig 3.
Performance of dogs in the Natural Detection Task.
Mean (SE) performances for the three dog groups across the five levels are shown. Dashed line represents chance level; Level 5 difference from chance: ** P<0.01. Level 5 difference between groups: # P = 0.053; ## P<0.01.
Table 1.
Percentages of incorrect choices that were ‘false’ and ‘no choice’ for each group at each level.
Fig 4.
Mean (SE) success rates for the retested animals in Test 1 and Test 2.
Fig 5.
Mean (SE) performance of wolves in the Natural Detection Task.
In addition to the average performance of the wolf group as a whole, the performance of the retested animals in Test 1 and Test 2 is shown across the five levels.