Honestly. From personal experience, I'd argue both simply based on the total number of people in my study (1, me). I never used to be like this. I forget many words, forget tasks, get distracted more easily, have trouble sitting through a movie, trouble staying on task. I never had this problem till a few years ago (32 years old now). It's been noticeable for me. I've known something is wrong for a time now. Wasn't sure what. Not 100% sure, but this seems like a good explanation of how my mind has changed since after highschool.