FIGURE 1. Experiments 1 and 2.
From the following article:
The concepts of 'sameness' and 'difference' in an insect
Martin Giurfa, Shaowu Zhang, Arnim Jenett, Randolf Menzel and Mandyam V. Srinivasan
Nature 410, 930-933(19 April 2001)
doi:10.1038/35073582
a, Learning performance of bees during training on colours (experiment 1) and on vertical and horizontal gratings (experiment 2). Data show the results of blocks of ten consecutive training visits for each experiment. b, c, Results of transfer tests. b, Transfer tests with patterns (colour training). In experiment 1, bees trained on the colours were tested on the gratings. c, Transfer tests with colours (pattern training). In experiment 2, bees trained on the gratings were tested on the colours. n, number of choices evaluated.