Table 4.

Breakdown of methods used by studies applying SPSS TwoStep (N=7).

Data type, dissimilarity, and scaling of continuous features			Categorical features encoded as binary?	Value, n (%)
Continuous
	Euclidean assumed
		No details	N/Aa	1 (14)
Mixed
	Log-likelihood assumed
		Scaled to lie in the interval 0 to 1	Yes	1 (14)
		z-scores	No	1 (14)
		No details	Yes	2 (29)
	Log-likelihood stated
		Scaled but method unspecified	No	1 (14)
		No details	No	1 (14)

^aN/A: not applicable (irrelevant for continuous features).