I have run a hierarchical multiple regression in SPSS, and read that I should also include Interaction Terms in the Final Block.  I have 4 IVs (Paternal Nurturance, Maternal Nurturances, Paternal Psychological Control and Maternal Psychological Control). Should I include all 6 Interaction between these 4 IVs or should I only include appropriate Interaction, and if it is the latter How can I detect what is the appropriate Interaction using SPSS?

This is the first time I'm using Hierachical Regression so I'm very confused.

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