Testing phase After the association between the bowl and the treats was
confirmed, the experimenter put a larger piece of liver treat in the bowl, showed the treat in the bowl to the dog, and went inside the testing room for the testing phase. The baited bowl was placed behind the barrier, but visible via the mirror, before the owner was instructed to lead the dog into the room by the collar. The owner was asked to lead the dog to a location in front of the mirror, on an “x” marked on the floor , which was approximately 60 cm from the mirror and was positioned at a good angle to see the food bowl via the mirror. The owner asked the dog to “sit” and “stay,” and the owner and experimenter stood in the same location against the wall where they had been during the first minute of the exposure phase; from this position, the owner could only see the treat via the mirror. The owner verbally released the dog from the sit command, and the dog was given 3 minutes to find the treat. Owners encouraged the dog to find the treat using verbal commands such as “where’s the treat?” and “find it!” but were instructed not to point to the location of the food. One owner pointed 4 times, even after being reminded by the experimenter not to point. Data from this dog were excluded from analysis. The total number of dogs included in analysis was 44. Dogs that did not find the treat within the allocated 3-minute period were shown the location of the treat to reward the dog for participation, regardless of whether it found the treat on its own. All dogs rapidly approached the bowl and ate the treat when they located it, either when they discovered it on their own within the 3-minute period or when they did not find it on their own and were shown its location.
Testing phase After the association between the bowl and the treats was
confirmed, the experimenter put a larger piece of liver treat in the bowl, showed the treat in the bowl to the dog, and went inside the testing room for the testing phase. The baited bowl was placed behind the barrier, but visible via the mirror, before the owner was instructed to lead the dog into the room by the collar. The owner was asked to lead the dog to a location in front of the mirror, on an “x” marked on the floor , which was approximately 60 cm from the mirror and was positioned at a good angle to see the food bowl via the mirror. The owner asked the dog to “sit” and “stay,” and the owner and experimenter stood in the same location against the wall where they had been during the first minute of the exposure phase; from this position, the owner could only see the treat via the mirror. The owner verbally released the dog from the sit command, and the dog was given 3 minutes to find the treat. Owners encouraged the dog to find the treat using verbal commands such as “where’s the treat?” and “find it!” but were instructed not to point to the location of the food. One owner pointed 4 times, even after being reminded by the experimenter not to point. Data from this dog were excluded from analysis. The total number of dogs included in analysis was 44. Dogs that did not find the treat within the allocated 3-minute period were shown the location of the treat to reward the dog for participation, regardless of whether it found the treat on its own. All dogs rapidly approached the bowl and ate the treat when they located it, either when they discovered it on their own within the 3-minute period or when they did not find it on their own and were shown its location.
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