Final answer:
Barry falls into the 'Late Majority' group of the Technology Adoption Lifecycle due to his skeptical nature and tendency to adopt a product once it has become widely used.
Step-by-step explanation:
Barry's tendency to adopt a new product only after most people have already purchased it places him in the Late Majority group in terms of consumer adoption categories. The Technology Adoption Lifecycle, developed by sociologist Everett Rogers, puts individuals like Barry among those who are more skeptical about innovations and will generally wait until an innovation has proven its worth and is already widely used within society before adopting it.
Those in the Late Majority require more evidence and may also be influenced by the bandwagon fallacy, where advertisers create the impression that "everyone" is buying a product, encouraging more people to adopt it.