We are administering 6 anagrams toward the end of our experiment on MediaLab (essay type of item). We want to know how much time the participants spend on each anagram. If we use the "@" symbol parameter for each essay item --which gives us the number of milliseconds passed since the last timestamp-- how can we find the correct time stamp information (amount of milliseconds passed since the last timestamp) for the last anagram if there is no timestamp after it?

Thank you.