Hello, Can anyone recommend a good, easy to grasp book on longitudinal data analysis? Or alternatively offer any advice? As a short overview I have 104 participants being tested on 8 working memory measures and a single maths measure (then including a measure of IQ in the next phase and subsequent one), they are being tested annually for three years. If you have direct/specific advice then please email me direct at [log in to unmask] but book recommendations reply to the list in case anyone else is having the same panic that I am right now. Best wishes glen