An automotive garage provides taxi rides to people who are having their cars repaired.To determine the quality of their service,the garage uses taxis operated by employees of the garage who are trained to record the number of specific gripes a rider makes about the garage.This is an example of

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This is an example of disguised observation where the employees of garage act as taxi drivers and observe the customer's feedback without disclosing their true identity to the customer.

An Automotive Garage Provides Taxi Rides to People Who Are