11 unread reply.11 reply. From the U.S. Preventive Task Force website https://www.uspreventiveservicestaskforce.org/BrowseRec/Index (Links to an external site.)Links to an external site., choose one screening test that might be Week 2: Discussion- Screening and Reliability considered in primary care. Define the test, its positive predictive value, reliability and validity. Discuss patient medical or family history that may alter your recommendation for screening?