what is the difference between a quadratic interaction and a linear interaction? what are the characteristics of a quadratic interaction why does the middle time divergence indicate a change from the earlier period of the experiment? why can you see a quadratic interaction what is the difference between a quadratic interaction and a reconvergent interaction what is the relationship between a quadratic interaction and a clinical study why would we find the divergence in late time what is the significance of a quadratic interaction why does the interrelationship between a time scale and a quadratic interaction diverge what type of interaction does a time scale show? why is the divergence in the middle time of a model clinically significant? what is the difference between the quadratic interaction, and the longitudinal interaction, when the trends diverge at different times? why does divergence of data indicate divergence when does the middle time diverge why does mid time diverge during the interaction can you test for quadratic interaction why do the trends diverge at the end of the time range what is the role of the interaction between two quadratic variables in a study what is the relationship between the quadratic interaction of two variables what are the differences in the time ranges