A teacher gives a 2-question quiz to a class of 30 students once before teaching the subject and another time at the end of the class. (The same exact 2 questions are given at the beginning and at the end of the class,i.e, Q11 is same as Q21 and Q12 is same as Q22). Each question is worth 1 point. The data looks like the following

```
name| Q11 |Q12 |Q21 |Q22
s1  |  .2 |.5  |.23 |.4
s2  |   0 |.2  |.4  |.4
...   ..  ..   ..  ..
s30 |  .15|.4  |.2  |.1

```

Can I apply MANOVA for repeated measures to this data? And how can I do it in R?

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**Clarification:** The test actually has 10 questions. The sort of questions that I would like to answer are:

1. Are the performance on the first and second quiz different?
2. If there is a difference, which questions are responsible for the difference?