Which symptom domain was the primary outcome in the Geld et al. 2013 multicenter RCT?

Which symptom domain was the primary outcome in the Geld et al. 2013 multicenter RCT?

• A. Depressive symptoms
• B. Negative symptoms
• C. Motivation for change
• D. Change in anxiety

Answer: (B)

The main idea being tested is which symptom area the study was designed to measure as its main result. In Geld et al. 2013, the intervention was aimed at reducing the core deficits that drive functional impairment in this condition—negative symptoms such as lack of motivation, reduced speech, and social withdrawal. Because the treatment was specifically developed to address these deficits, the researchers chose negative symptoms as the primary outcome to directly capture the treatment’s effect where it matters most. Depressive symptoms, anxiety, and even motivation for change are still important to observe, but they don’t reflect the specific target of the intervention as cleanly. Depressive symptoms and anxiety can fluctuate for many reasons and may improve for reasons unrelated to the main treatment effect, while motivation for change functions more as a process or mediator rather than the primary endpoint. So focusing on negative symptoms provides the clearest evidence about whether the intervention achieves its intended clinical impact.

The main idea being tested is which symptom area the study was designed to measure as its main result. In Geld et al. 2013, the intervention was aimed at reducing the core deficits that drive functional impairment in this condition—negative symptoms such as lack of motivation, reduced speech, and social withdrawal. Because the treatment was specifically developed to address these deficits, the researchers chose negative symptoms as the primary outcome to directly capture the treatment’s effect where it matters most.

Depressive symptoms, anxiety, and even motivation for change are still important to observe, but they don’t reflect the specific target of the intervention as cleanly. Depressive symptoms and anxiety can fluctuate for many reasons and may improve for reasons unrelated to the main treatment effect, while motivation for change functions more as a process or mediator rather than the primary endpoint. So focusing on negative symptoms provides the clearest evidence about whether the intervention achieves its intended clinical impact.