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David C. Mak

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Publications by David C. Mak (bibliography)

» 1993 «

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Moher, Thomas G., Mak, David C., Blumenthal, Brad and Leventhal, Laura Marie (1993): Comparing the Comprehensibility of Textual and Graphical Programs: The Case of Petri Nets. In: Cook, Curtis, Scholtz, Jean and Spohrer, James C. (eds.) Empirical Studies of Programmers - Fifth Workshop December 3-15, 1993, 1993, Palo Alto, California. pp. 137-161.

“In an experiment inspired by Green, Petre, and Bellamy (1991), three forms of Petri net representations were tested against two textual program representations for comprehensibility. Two tasks were employed: question-answering and matching. The results reaffirmed the textual match-mismatch phenomenon frequently reported for circumstantial vs. sequential programs, but failed to find a match-mismatch for alternative net representations. Petri nets appeared to be more well-suited in general to backwards questions, but performance was strongly dependent to the layout of the Petri nets. In general, the results indicate that the efficacy of a graphical program representation is not only task-specific, but also highly sensitive to seemingly ancillary issues such as layout and the degree of factoring.”

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