An Empirical Study of the Impact of Two Antipatterns, Blob and Spaghetti Code, On Program Comprehension. Abbes, M., Khomh, F., Guéhéneuc, Y., & Antoniol, G. In Kanellopoulos, Y. & Mens, T., editors, Proceedings of the 15<sup>th</sup> European Conference on Software Maintenance and Reengineering (CSMR), pages 181–190, March, 2011. IEEE CS Press. Best paper. 10 pages.Paper abstract bibtex Antipatterns are ``poor'' solutions to recurring design problems which are conjectured in the literature to make object-oriented systems harder to maintain. However, little quantitative evidence exists to support this conjecture. We performed an empirical study to investigate whether the occurrence of antipatterns does indeed affect the understandability of systems by developers during comprehension and maintenance tasks. We designed and conducted three experiments, with 24 subjects each, to collect data on the performance of developers on basic tasks related to program comprehension and assessed the impact of two antipatterns and of their combinations: Blob and Spaghetti Code. We measured the developers' performance with: (1) the NASA task load index for their effort; (2) the time that they spent performing their tasks; and, (3) their percentages of correct answers. Collected data show that the occurrence of one antipattern does not significantly decrease developers' performance while the combination of two antipatterns impedes significantly developers. We conclude that developers can cope with one antipattern but that combinations of antipatterns should be avoided possibly through detection and refactorings.
@INPROCEEDINGS{Abbes11-CSMR-AntipatternsImpactComprehension,
author = {Marwen Abbes and Foutse Khomh and Yann-Ga{\"e}l Gu{\'e}h{\'e}neuc and Giuliano Antoniol},
title = {An Empirical Study of the Impact of Two Antipatterns, Blob and Spaghetti Code, On Program Comprehension},
booktitle = {Proceedings of the 15<sup>{th}</sup> European Conference on Software Maintenance and Reengineering ({CSMR})},
year = {2011},
month = {March},
editor = {Yiannis Kanellopoulos and Tom Mens},
publisher = {IEEE CS Press},
note = {Best paper. 10 pages.},
abstract = {Antipatterns are ``poor'' solutions to recurring design problems which are conjectured in the literature to make object-oriented systems harder to maintain. However, little quantitative evidence exists to support this conjecture. We performed an empirical study to investigate whether the occurrence of antipatterns does indeed affect the understandability of systems by developers during comprehension and maintenance tasks. We designed and conducted three experiments, with 24 subjects each, to collect data on the performance of developers on basic tasks related to program comprehension and assessed the impact of two antipatterns and of their combinations: Blob and Spaghetti Code. We measured the developers' performance with: (1) the NASA task load index for their effort; (2) the time that they spent performing their tasks; and, (3) their percentages of correct answers. Collected data show that the occurrence of one antipattern does not significantly decrease developers' performance while the combination of two antipatterns impedes significantly developers. We conclude that developers can cope with one antipattern but that combinations of antipatterns should be avoided possibly through detection and refactorings.},
grant = {NSERC DG and CRC on Software Patterns},
keywords = {Code and design smells ; Understanding program comprehension ; CSMR},
kind = {MISA},
language = {english},
url = {http://www.ptidej.net/publications/documents/CSMR11a.doc.pdf},
pdf = {http://www.ptidej.net/publications/documents/CSMR11a.ppt.pdf},
pages = {181--190},
comment = {Best paper.}
}
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