Two Step Cluster

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Two Step Cluster is IBM's brand name for a variant of Mixed-Mode Cluster Analysis.

The key differences between the two methods are that:[note 1]

  • Q's algorithm can also address MaxDiff, ranking, conjoint and discrete choice data (whereas these first need to be treated as numeric data in the IBM algorithm).
  • Q assumes spherical clusters by default. This can changed by setting Distribution to Multivariate - Diagonal in the Advanced option.

Notes

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Further reading: Latent Class Analysis Software
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