Potential explanations for control group benefit

http://ctj.sagepub.com: 8/23/12

Estimating effectiveness of clinical interventions depends on detecting differences between the responses of intervention and control groups. The outcome, intervention, and moderating factors all may influence the between group change. The absence of a clinically or statistically meaningful difference may also result from control group improvement due to nonspecific factors such as participants’ perception of attention, positive regard, expectations, desire to please, and therapeutic alliance with the care provider.

Purpose We examined perceived benefit and sources of benefit for control caregivers who participated in the CONNECT randomized controlled trial of a dementia caregiving intervention. Read more