שאלה | Janik and Slater (1997) conducted a study with 4 captive dolphins in whose course they investigated the behavior of the dolphins during separations. The separations occurred when the dolphin swan to another pool. Which of the following statements about the experiments is TRUE?

Janik and Slater (1997) conducted a study with 4 captive dolphins in whose course they investigated the behavior of the dolphins during separations. The separations occurred when the dolphin swan to another pool. Which of the following statements about the experiments is TRUE?

		During separations, the proportion of the signature whistles increased for both the three dolphins that remained in the original pool and for the dolphin who was separated.
		During separations, the proportion of the signature whistles increased only for the three dolphins that remained in the original pool.
		During separations, the proportion of the signature whistles increased only for the dolphin who was separated
		During separations, the proportion of the signature whistles did not increase at all.