Student or Learner
Two types of negative belief are important: negative beliefs about the uncontrollability of worry and negative beliefs about its harmful or dangerous consequences. The latter category contains beliefs that worry can lead to physical (e.g., heart attack), psychological (e.g., mental breakdown), or social (e.g., rejection by others) catastrophe.
Does "the latter" in the second line refer to negative beliefs?
'The latter' means the second of two, so here it refers to the second type of negative beliefs.