The types of descriptive research study that measure a population at only one point in time is: Marketing Chapter 4 The types of descriptive research study that measure a population at only one point in time is: a. Point-in-time studies. b. Longitudinal studies. c. Cross-point studies. d. Cross-sectional studies. Answer: d. Cross-sectional studies. Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+