Response to Methodological Considerations in Robotic Pet Interventions

Zhang and Du 1 offer some reconsideration regarding the paper by Albert and his colleagues 2 on a pilot trial of robotic pets' effects on mood in older adults receiving caregiver support. To their credit, Zhang and Du offer alternative explanations for the pilot study's findings. From a methodological standpoint, however, Zhang and Du raise issues that warrant closer consideration regarding the causal interpretation of the reported findings: 1. Proxy reporting reflects caregiver perception, 2. The need for active comparators, and 3. expanded follow-up to distinguish novelty from prolonged benefit.