How she settled on those items was complicated by the fact that she has two young children, a golden retriever and three cats, and that she was starting a new job last month with an hourlong commute. She said she needed “six items that are animal-hair-, kid-, food- and wrinkle-resistant. I need these items to be professional, but also work for playing football with my son and tea parties.”

She agonized the longest over the T-shirt — the button-down shirts and suit separates were for work, but the right T-shirt could be worn casually with jeans or dressed up with the blazer. Her revelation at the end of 31 days, after her husband still had not noticed, even when she wore her floral-printed pajamas to do yard work: “Obviously, I didn’t need all of these clothes.”

This self-imposed exercise in frugality was prompted by a Web challenge called Six Items or Less (sixitemsorless.com). The premise was to go an entire month wearing only six items already found in your closet (not counting shoes, underwear or accessories). Nearly 100 people around the country, and in faraway places like Dubai and Bangalore, India, were also taking part in the regimen, with motives including a way to trim back on spending, an outright rejection of fashion, and a concern that the mass production and global transportation of increasingly cheap clothing was damaging the environment.

Meanwhile, an even stricter program, the Great American Apparel Diet, which began on Sept. 1, has attracted pledges by more than 150 women and two men to abstain from buying for an entire year. (Again, undies don’t count.) And next month, Gallery Books will publish a self-help guide, called “The Shopping Diet,” by the red-carpet stylist Phillip Bloch. (“Step 1: Admit You’re an Overshopper”... “Step 9: Practice Safe, Responsible Shopping”... “Step 10: Make the Diet a Way of Life.”)

Though their numbers may be small, and their diets extreme, these self-deniers of fashion are representative, in perhaps a notable way, of a broader reckoning of consumers’ spending habits. As the economy begins to improve, shoppers of every income appear to be wrestling with the same questions: Is it safe to go back to our old, pre-recession ways? Or should we? The authors of these diets — including some fashion marketing and advertising executives, interestingly enough — seem to think not.