TABLE 2.

Comparison of parameters used needed for different methods

Wavelet	VT	T-test	χ2
Prefilter rank	Prefilter rank		Prefilter rank
Dyadic scale range	Window size	Window size	Step joining range
Threshold level	Threshold level	Threshold level	Number of steps

For rough guidance, the ease with which a given parameter can be optimally set is represented by shading (darker shading represents parameters which are harder to set). The more sensitive the method to a given parameter, the harder it is to set optimally. Note that the easiest parameters to set are the number of steps for the χ² method (where robust guidance for setting the parameter is available) and the dyadic scale range for the wavelet method (since the method is not very sensitive to this setting). On the other hand, optimally setting thresholds for the wavelet, VT, and t-test methods is difficult, especially when little a priori knowledge about the data is available.