Here is the actual sentence the title was edited from: >After correcting for multiple testing, a greater frequency and earlier onset of regular cannabis use we

Here is the actual sentence the title was edited from: >After correcting for multiple testing, a greater frequency and earlier onset of regular cannabis use were associated with poorer cognitive performance, specifically on tests of verbal memory. I thought the bad grammar was just a typo, but it was due to you cutting up the sentence to mean something different than what the paper actual states.