抄録
This study examined whether miniature pigs could discriminate people based on their photographs. In experiment 1, the pigs were trained to discriminate between two people in the Y maze. All pigs successfully discriminated between the persons. The pigs were then tested with photographs of those same people, but no pigs discriminated between the photographs. In experiment 2, three pigs were trained to discriminate between photographs of people. Then they were tested to determine whether they could discriminate the same people. Some pigs appeared to discriminate between one pair of people but not the other pairs. In experiment 3, four pigs were used to test whether they had learned to discriminate between photographs of people learned more quickly to discriminate them than pigs that had learned to discriminate between two-dimensional abstract figures. The number of sessions to discriminate between people was not affected by the treatment. Results show that pigs can learn to discriminate between people and between photographs of people, but they had difficulty in discriminating the people based on their photographs.
