Each listener was tested in four sessions each lasting for about 2 h (including breaks). In each session, the two context conditions were run in a blocked design. The first half of the session was dedicated to one context condition and the second half of the session to the other. The order of the context conditions was counterbalanced across sessions and listeners. Within each condition, trials were arranged in blocks of 105. Each block started with five context trials to allow listeners to “tune in” to the F0. After that, context trials and test trials were randomly interspersed with the constraint that each set of 10 trials contained 6 context trials and one of each type of the test trials (third mistuned upwards, third mistuned downwards, fourth mistuned upwards, fourth mistuned downwards). Overall, in the main experiment, there were 320 trials for each mistuned harmonic for each direction of mistuning and listener (and 1920 context trials for each context condition).