In code comprehension tasks, students may be asked to explain critical steps of the code. 
The ability to automatically assess these self-explanations offers a unique opportunity to understand the current state of student knowledge,
recognize possible misconceptions, and provide feedback. Annotated datasets are needed to train Artificial Intelligence/Machine Learning approaches for the 
automated assessment of student explanations. To answer this need, we present a novel corpus called SelfCode which consists of 
1,770 sentence pairs of student and expert self-explanations of JAVA code examples along with semantic similarity judgments provided by experts. 

## Data Set Example
| Line of Code | Crowd Sourced Explanation | ExpertExplanation | Annotation Score |
| --- | --- | ---| --- |
| int [] arr = { 1, 2, 3}; | Declares the array we want to use for our assignment | We initialize the array of type int to hold the specified numbers. | 4 |
| int num = 15; | variable decleration: declares the number we are trying to divide | We could initialize it to any positive integer greater than 1. | 1 |
|  divisor += 1; | if the loop condition is true, then we increment the divisor by 1 | When the divisor is not a factor of the number, we increment the variable divisor by 1. | 3 |
| int seconds = scan.nextInt(); | Get the number entered by the user. | We read the seconds by calling the nextInt() method because this input is an integer. | 2 |
| System.out.println("Enter an integer: "); | Ask the user to enter an integer. | We prompt the user to enter an integer.| 5 |

## Data Set Stats

| Annotation Label | No. of sentence pairs |
| --- | --- |
| 1 | 529 |
| 2 | 507 |
| 3 | 419 |
| 4 | 253 |
| 5 | 62 |


# Cite Our Work
If you use the SelfCode data set, please cite [our publication](https://journals.flvc.org/FLAIRS/article/view/133385/137950): 
```bibtex
@article{Chapagain_Risha_Banjade_Oli_Tamang_Brusilovsky_RUs,
    title = {SelfCode: An Annotated Corpus and a Model for Automated Assessment of Self-Explanation During Source Code Comprehension},
    volume = {36},
    url = {https://journals.flvc.org/FLAIRS/article/view/133385},
    number = {1},
    journal = {The International FLAIRS Conference Proceedings},
    author = {Chapagain, Jeevan and Risha, Zak and Banjade, Rabin and Oli, Priti and Tamang, Lasang and Brusilovsky, Peter and Rus, Vasile}
} 
```