Figure 4.

Psychometric functions of German and Japanese subjects for each deviant stimulus in the tests before (thin line) and after (thick line) training. Before training, the deviant variant 4 exceeds the random level (50%). After training in each condition, the deviant variant 2 is recognized as different. German subjects improved maximally in the difference variants 2–4 from the first test before training to the last test after training. Japanese subjects already recognized the deviant variant 2 in almost each condition above random level.