The Complexity Of Proceduralized Tasks
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The Complexity of Proceduralized Tasks
Author: Jinkyun Park
language: en
Publisher: Springer Science & Business Media
Release Date: 2009-09-17
We think we have scientific knowledge when we know the cause. (Aristotle, Posterior Analytics Book II, Part 11) About 12 years ago, when I was a graduate student, many people were concerned about my Ph. D. topic – investigating the effect of the complexity of procedu- lized tasks on the performance of human operators working in nuclear power plants. Although they agreed with the fact that procedures (especially emergency operating procedures) play a crucial role in securing the safety of nuclear power plants, it was amazing that most of them pointed out a very similar issue: “I cannot understand why operating personnel see any difficulty (or complexity) in condu- ing procedures, because all that they have to do is to follow a simple IF-THEN- ELSE rule as written. ” Actually, this issue is closely related to one of the main questions I was recently asked, such as “Don’t you think your work is too acad- ic to apply to actual procedures?” or “I guess we don’t need to consider the c- plexity of procedures, because we can develop a good procedure using many pr- tical procedure writers’ guidelines. Then what is the real contribution of your work?” I absolutely agree with the latter comment. Yes, we can develop a good pro- dure with the support of many practical and excellent guidelines.
Procedural and declarative information in software manuals
People who use software manuals want to get something done. Procedural information directly supports this goal, but the use of declarative information in manuals has often been under discussion. Current research gives rise to the expectation that manual users tend to skip declarative information most of the time. Also, no effects of declarative information in software manuals have yet been found. In this study, information use and information effects in software manuals are investigated in three experiments, thereby taking different user types, different task types and different information arrangements into account. A new technique was applied: the click&read method. This technique enables the software user to use the manual and carry out software tasks at the same time while information selection and times are recorded automatically in logfiles. For the first time, quantitative data are presented about the amounts of procedural and declarative information that were selected and the times that were spent using these information types. Although procedural information is selected more often and used longer, declarative information appears to be a substantial part of the information selection. Moreover, the results show that using declarative information positively affects performance on future tasks, performance on reasoning tasks and factual knowledge.
Self-Regulation in Activity Theory
Every complex human-machine system includes a computer as a critically important means of work. However, an operator's interaction with a computerized system cannot be reduced to only performing computer-based tasks. Today human-computer interaction (HCI) is not limited to trained software users. People of all ages use all different kinds of gadget