Figure 6
From: Cichlids and stingrays can add and subtract ‘one’ in the number space from one to five
Exemplary graph of the performance of a stingray during the entire training and testing (overtraining) phase. The black line shows the percentage of correct choices per ten-trial session. The horizontal red dotted line indicates the lower limit of the LC, while the vertical red line indicates the time when the LC was achieved. In the sessions following the red vertical line, transfer tests were added to the regular ten trial session. The blue line gives the average trial time for each session.
