A researcher is interested in the effects of a preschool program on later school performance. Because she is concerned that socio-economic-status (SES) is a potential extraneous variable in her study, she picks^&tyldren to study who are only from low SES homes. The control technique she used in this study was- ....

Business Relationship Management (BRM) is viewed as a philosophy, capability, discipline, and role to evolve culture, build partnerships, drive value, and satisfy purpose.

Note: BRM is distinct from enterprise relationship management and customer relationship management although it is related. It is of larger scope than a liaison who aligns business interests with IT deliverables. (Source: Wikipedia)