A study found that the relationship between psychological therapy session volume (hours per week) is negatively correlated (r = -0.58) to the number of depression episodes experienced by patients, per week, suggests that: Question 4 options: More therapy hours per week is related to a greater number of depression episodes in patients. More therapy hours per week is related to a lower number of depression episodes in patients. Therapy sessions will cause a reduction in depression episodes in patients. Over half of the variability in depression episodes in patients can be predicted by the number of hours of therapy sessions per week