The trend is towards neither, I'd say. The biggest trend has been towards online automatically graded multiple choice & short answer questions that aren't reall

The trend is towards neither, I'd say. The biggest trend has been towards online automatically graded multiple choice & short answer questions that aren't really open ended. The automated essay grading stuff typically looks at writing style more than content, but it's true that it's a problem that tons of people have worked on and there's been some cool progress there as well. We're not really working on bringing AI to essay grading ourselves though.