What type of testing would be most effective in finding logical errors in an application's coding?

White-box testing is particularly effective in finding logical errors in an application's coding because it involves examining the internal structures or workings of an application. During this type of testing, the tester has access to the source code and can verify the logic in algorithms, data flows, and conditions within the code. This allows for a thorough analysis of how the application is implemented, making it easier to identify logical discrepancies that might not produce expected outputs or function as intended.

This approach goes beyond simply checking outputs against inputs; it involves delving into the actual code to understand how data is manipulated. By doing so, testers can pinpoint where the logic may fail, such as within loops, conditional statements, or functions, which is crucial for debugging and ensuring software reliability.

Other types of testing, such as performance testing, focus on the behavior of the application under various conditions, user acceptance testing centers on whether the application meets user needs, and regression testing checks for new bugs in existing functionality after changes. While those types of testing are important, they do not specifically target the internal logic of the code as directly as white-box testing does.