<p>IIRC, the writing section was introduced to the SAT in the middle of 2005. (May sitting, perhaps?) The PSAT had a writing section before then–it was introduced in 1997. It took more than a full year’s worth of SAT scores before the statistical alignment occurred.</p>
<p>Just FYI, before the writing section was introduced the “selection index” was calculated by doubling the verbal score (approximately the same as what is now CR) and adding it to the math score. And in 1995 all scores were “re-centered” – brought up so that the median was about 50 on each section – so that scores before then really cannot be compared at all.</p>