@inproceedings{price_liu_catete_barnes_2017, title={Factors influencing students' help-seeking behavior while programming with human and computer tutors}, DOI={10.1145/3105726.3106179}, booktitle={Proceedings of the 2017 ACM Conference on International Computing Education Research (ICER 17)}, author={Price, T. W. and Liu, Z. X. and Catete, V. and Barnes, T.}, year={2017}, pages={127–135} }
 @article{liu_zhi_hicks_barnes_2017, title={Understanding problem solving behavior of 6-8 graders in a debugging game}, volume={27}, DOI={10.1080/08993408.2017.1308651}, number={1}, journal={Computer Science Education}, author={Liu, Z. X. and Zhi, R. and Hicks, A. and Barnes, T.}, year={2017}, pages={1–29} }
 @inproceedings{liu_mostafavi_barnes_2016, title={Combining worked examples and problem solving in a data-driven logic tutor}, volume={0684}, DOI={10.1007/978-3-319-39583-8_40}, booktitle={Intelligent tutoring systems, its 2016}, author={Liu, Z. X. and Mostafavi, B. and Barnes, T.}, year={2016}, pages={347–353} }
 @inproceedings{liu_barnes_2015, title={Building compiler-student friendship}, volume={9112}, DOI={10.1007/978-3-319-19773-9_129}, booktitle={Artificial intelligence in education, aied 2015}, author={Liu, Z. X. and Barnes, T.}, year={2015}, pages={844–847} }