Figure 4.

Fraction of Go-responses toward the regular strings (shaded diamonds) and irregular strings (open diamonds) with elongated (2a) or shortened (2b) elements and pauses, as well as only shortened pauses (2c) and only shortened elements (2d) creating a 25% increase or decrease of the IXI. Black lines shown the average fraction of Go responses of the six zebra finches. Asterisks indicate a significant difference between the responses to the Go and to the No-go strings, + symbols indicate a trend, ns indicates no significant difference. Individual budgerigar results are shown with shaded circles (regular strings) and open circles (irregular strings).