What does usability testing primarily aim to measure?

Usability testing primarily aims to measure user satisfaction and learning ability. This type of testing focuses on how real users interact with a system or application to determine how easy and intuitive the software is for them. By observing users as they perform tasks, usability testing gathers insights on whether users find the interface friendly, engaging, and straightforward.

This approach allows testers to identify any barriers that prevent users from accomplishing their goals efficiently. User satisfaction indicates whether users feel comfortable and happy using the product, while learning ability assesses how quickly users can become proficient with the system. These factors are critical for ensuring that the application meets the needs of its target audience, leading to better adoption rates and fewer user frustrations.

In contrast, measuring the speed of execution relates more to performance testing, which looks at how quickly an application runs under certain conditions. Automated testing scripts are focused on validating functionality and regression but do not address user experience directly. Code efficiency pertains to the optimization of the codebase and impacts performance but is not a metric used in usability testing. Thus, the emphasis on user satisfaction and learning ability makes this answer the most accurate representation of usability testing goals.