<p>I don’t know why Caltech admissions no longer does interviews. I believe they did once, but I could be wrong. One guess would be that with Caltech’s relatively small size, it simply isn’t feasible to get enough Alumni/admissions officers to conduct interviews for all the applicants. I wouldn’t be opposed to seeing Caltech do interviews, but I do think they have their own problems; you probably can’t fake math/science passion in an interview, but if you don’t interview well you could possibly wreck an otherwise good application.</p>