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Pigeons were trained on a procedure of conditional discrimination using the space location of their behavior as samples. There were three experimental conditions based on the number of responses demanded as sample. The subjects of «one response group» had to choose between a red or green key (comparison component) after the emission of a single response to the left or right white keys (sample component). In the «five responses group», the sample of own¿s behavior to discriminate was increased up to 5 consecutive responses. In the «zero responses group», pigeons were trained on a similar task, but discriminating the space location of the one lighted white-key (right or left) being prevented to give differential responses to that exteroceptive sample (DRO contingency). The results are discussed in relation to the possible importance of the number of emitted responses to sample in the procedures of own¿s one behavior discrimination, as well as the competitive paper that the exteroceptive cues could play with respect to the propioceptive cues coming from the own¿s subject behavior.
