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IDENTIFYING THE POINT OF DIMINISHING MARGINAL UTILITY
FOR COGNITIVE TASK ANALYSIS
SURGICAL SUBJECT MATTER EXPERT INTERVIEWS
by
Patrick Douglas Crispen
A Dissertation Presented to the
FACULTY OF THE USC ROSSIER SCHOOL OF EDUCATION
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF EDUCATION
May 2010
Copyright 2010 Patrick Douglas Crispen
Object Description
| Title | Identifying the point of diminishing marginal utility for cognitive task analysis surgical subject matter expert interviews |
| Author | Crispen, Patrick Douglas |
| Author email | crispen@usc.edu; crispen@gmail.com |
| Degree | Doctor of Education |
| Document type | Dissertation |
| Degree program | Education (Leadership) |
| School | Rossier School of Education |
| Date defended/completed | 2010-02-08 |
| Date submitted | 2010 |
| Restricted until | Unrestricted |
| Date published | 2010-03-23 |
| Advisor (committee chair) | Clark, Richard E. |
| Advisor (committee member) |
Yates, Kenneth A. Sullivan, Maura E. |
| Abstract | Residents in surgical residency programs are taught through a hands-on apprenticeship under the supervision of surgical subject matter experts despite the fact that those experts are largely unaware of the automated strategies that guide most of their problem-solving. In fact, experts often omit as much as 70% of the procedural knowledge that novices need to learn. This study examines the amount of procedural steps in an open cricothyrotomy procedure that can be learned from multiple surgical subject matter expert interviews using Cognitive Task Analysis (CTA) techniques. CTA focuses on measuring the mental models used in task performance, capturing not only declarative knowledge but also procedural knowledge.; Using CTA-based interview techniques, six expert trauma surgeons employed by the Department of Surgery of a private, urban medical school in the western United States were separately interviewed about how to perform an open cricothyrotomy procedure. The interviews were coded and converted into ordered, procedural checklists that listed all of the equipment, conditions, action steps, and decision steps that each subject matter expert mentioned in his or her interview as being necessary to successfully perform the procedure. Those individual checklists were then converted into a single criterion standard, hereafter termed as the 'gold standard', for the open cricothyrotomy procedure against which each expert's checklist was graded for completeness.; This study found that, on average, each surgical subject matter expert who participated in this study omitted 44% of the total steps, 34% of the action steps, and 72% of the decision steps contained within a six-expert open cricothyrotomy 'gold standard' procedure. The results of this study also show that interviewing four experts was necessary to reach a 10% point of diminishing marginal utility for the elicitation of additional procedural steps. This appears to contradict the conclusions of previous studies that showed that interviewing three experts was optimal for knowledge elicitation. |
| Keyword | cognitive task analysis; cricothyrotomy; CTA; medical education; surgery |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m2873 |
| Rights | Crispen, Patrick Douglas |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Crispen-3508 |
| Archival file | uscthesesreloadpub_Volume40/etd-Crispen-3508.pdf |
Description
| Title | Page 1 |
| Full text | IDENTIFYING THE POINT OF DIMINISHING MARGINAL UTILITY FOR COGNITIVE TASK ANALYSIS SURGICAL SUBJECT MATTER EXPERT INTERVIEWS by Patrick Douglas Crispen A Dissertation Presented to the FACULTY OF THE USC ROSSIER SCHOOL OF EDUCATION UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF EDUCATION May 2010 Copyright 2010 Patrick Douglas Crispen |
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