In our own tests at Consumer Reports, we found that the recommended kits showed no false positives and no false negatives.

NPR: Do Home Lead-Testing Kits Work?

In secret shopper tests, the Communications Consumer Panel found that over half of shoppers were given inaccurate information.

BBC: Mobile firms failing on coverage

MPs rejected a motion calling for the government to ensure that the police and fraud specialists investigate criminal networks involved in horsemeat adulteration and speed up the FSA tests to restore consumer confidence.

BBC: Horsemeat scandal: 'Too trusting' on meat supplies

We would not be surprised to see Toyota take aim at Consumer Reports if they are unable to replicate these results in their own tests.

FORBES: Toyota Takes A Shot Right In The Lexus

Just weeks after the magazine assailed Ford for how the complexity of the MyFord Touch system continued to confuse American car buyers, Consumer Reports alleged that the Ford Fusion Hybrid delivered only 39 mpg in its tests of the vehicle in highway and city driving, far short of the 47 mpg Ford claims for the model.

FORBES: Consumer Reports Zings Ford Over Hybrid Mileage Ratings

Paradoxically, the authors say, the consumer movement in health care encourages patients to request "the latest and greatest" tests and screening even when they aren't medically necessary, further encouraging doctors to order more rather than focus on the relationship with the patient.

WSJ: The Health Reader: Listen Up, Doc

Consumer reports bases its ratings on a number of extensive tests and rates the devices in categories including ease of use, display and voice quality, portability and battery life.

CNN: Consumer Reports: Samsung Galaxy S4 is top phone