Final answer:
Error guessing targets testing based on the tester's experience and intuition, hence it is known as Experience-based testing. It relies on the tester's knowledge and understanding to predict where errors may occur, making it particularly effective in familiar areas of software applications.
Step-by-step explanation:
If you are using error guessing to target your testing, you are engaging in Experience-based testing. This is a type of software testing technique where the tester uses their experience to guess the problematic areas of the software application. Error guessing is not structured or based on formal methodologies; therefore, it contrasts with specification-based, structure-based, and reference-based testing methodologies.
The tester draws on their personal experience, possibly including knowledge of common software bugs, or an understanding of the software's design and deployment environment, to predict where errors are most likely to arise. This approach can be very effective for finding bugs in areas that are commonly problematic, although it may miss issues in less well-understood parts of the program.