(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.

Fig. 2. First choice of color (A) at the feeder, and (B) at the nest. Graphs plot
the proportion of bees (out of 30) that made the correct choice in each trial.
The dashed line represents no choice or chance expectation (33%). Solid gray
line divides phase 1 and 2. Phase 1 is represented by trials -8 to -1, and
phase 2 by trials 1 to 8. The last eight trials are graphed from phase 1.