Lesson (nominal)
Name (nominal)
Production (nominal)
Cell (specific interface element where action/answer occurred) (nominal)
Correct answer? (0,1)
Known Bug? (0,1)
Help request? (0,1)
Choice Widget? (0,1)
String Response? (0,1)
Number Response? (0,1)
Point Plotted? (0,1)
(if all 4 of proceeding are 0, it is a checkbox)
Pknow-direct (see Baker, Corbett, and Koedinger 2004)
Pknow (quantitative)
Not first attempt at skill in this problem (0,1)
Time taken (quantitative)
Time taken, normalized in terms of SD off average across all students at this step (quantitative)
Time taken in last three actions, normalized (quantitative)
Time taken in last five actions, normalized (quantitative)
Answer was not right (redundant feature) (0,1)
How many errors has the student made on this skill in all problems (quantitative)
How many help requests has this student averaged on this skill across problems (quantitative)
How many errors has this student averaged on this skill across problems (quantitative)
Total time spent on this skill across problems (quantitative)
How many of the previous 3 actions were on the same cell (quantitative)
How many of the previous 5 actions were on the same cell (quantitative)
How many of the previous 8 actions were help requests (quantitative)
How many of the previous 5 actions were errors (quantitative)
Has the student made at least 3 errors on this problem step, in this problem? (0,1)
Is this a skill that all students learn very rapidly? (P(T)>0.9) (0,1)
Is this a skill that students generally do not learn? (P(T)<0.01) (0,1)




