Abstract: Methods and systems for computer-based neurocognitive testing are disclosed. A system for computer-based neurocognitive testing includes stand-alone agent software capable of executing on a general purpose computing platform. The agent software administers a battery of neurocognitive tests to the subject and records the subject's responses. The subject's reaction times for individual responses may be recorded, even in tests for which reaction times for individual responses were not conventionally recorded. The reactions may be recorded with millisecond accuracy, even when the agent software is executing over a non-real-time operating system. The agent software generates an agent report indicating the subject's responses to the tests and reaction times. The agent software may upload the test results to the server.