To compare treatment strategies in various psychiatric settings, researchers are evaluating the psychiatric patients' levels of depression every four months for four years in three different hospitals.What type of research are they applying?

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The researchers are evaluating the levels of depression in psychiatric patients every four months for four years, which indicates that they are conducting a longitudinal study. A longitudinal study measures a variable such as depression over an extended period, typically several years, to assess changes or stability of the variable in the same group of individuals.

To Compare Treatment Strategies in Various Psychiatric Settings, Researchers Are