How do colleges decide who to send information letters to?

<p>For instance, after I took the psat sophomore year, I began to receive college information letters. However, after the junior psat, how do colleges decide who they want to send information to if they don't receive or see the junior student's psat score?</p>

<p>College Board sells mailing lists (Student Selection Service). Colleges can request certain parameters (PSAT scores in a certain range, zip code, intended major, etc).</p>