Comparing the Performance of Popular MEG/EEG Artifact Correction Methods in an Evoked-Response Study

Table 1

Deviant tones. Type of deviant is the type of change applied to the tone, and description explains the change. Occurrence describes whether the change is presented in different patterns randomly (single) or is present constantly in each following pattern from the first presentation until the next deviant of the same type occurs (consistent). Tone number denotes at which tone of the melody pattern the change may occur. Melodies with deviants column shows the percentage of melodies containing the particular type of deviant.

Type of deviant	Description	Occurrence	Tone number	Melodies with deviants
Mistuning	3% pitch frequency increase	Single	1st, 2nd, 4th	14%
Timbre	Flute sound	Single	1st, 3rd, 4th, ending	8%
Timing delay	100 ms silent gap before the tone	Single	1st, 2nd, 3rd, ending	8%
Melody modulation	Tone replacement	Consistent	3rd, 4th	12%
Rhythm modulation	Duration switch between two successive tones	Consistent	2nd, 3rd	7%
Transposition	Semitone pitch change of a pattern	Consistent	Initial triad	16%