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Dissertation Information for Roger Azevedo

NAME:
- Roger Azevedo

DEGREE:
- Ph.D.

DISCIPLINE:
- Educational Psychology

SCHOOL:
- McGill University (Canada) (1998)

ADVISORS:
- Susanne P. Lajoie

COMMITTEE MEMBERS:
- None

MPACT Status: Incomplete - Not_Inspected

Title: Expert problem solving in mammogram interpretation: A visual cognitive task

Abstract: The problem solving strategies used by staff radiologists and radiology residents during the process of interpreting difficult breast diseases depicted on mammograms were examined. Staff radiologists ( n = 10) and radiology residents ( n = 10) diagnosed 10 cases under two experimental conditions (5 authentic and 5 augmented). In the authentic condition, standard unmarked mammograms were used. Mammographic findings were highlighted on a second set of the same cases for the augmented condition. The experimental sessions were recorded and the verbal protocols were analyzed based on a coding scheme derived from an analysis of mammography interpretation. The results were used to refine this analysis and develop a model of mammography interpretation. Repeated measures ANOVAs revealed (a) that staff radiologists scanned the cases significantly faster than residents with no significant main effect for condition and no interaction, and (b) no differences between groups in reading time across experimental conditions. No group differences were found in the number of radiological findings, radiological observations, and number of diagnoses across experimental conditions. Frequency analyses revealed that both groups regardless of experimental condition (a) used the same types of operators, control processes, diagnostic plans and goals, (b) committed the same number of errors, and (c) committed case-dependent errors. Analyses revealed that mammography interpretation was characterized by a predominant use of data-driven or mixed strategies depending on case typicality and clinical experience. The fact that few differences were found between the groups on the various measures may be due to the fact that mammogram interpretation is a well-constrained task. The theoretical implications of the study include the need for further research for the purposes of building a more detailed, comprehensive model of the perceptual and cognitive processes underlying mammogram interpretation. Finally, the results have been applied to develop a basic conceptual framework for the development of the RadTutor, a computer-based tutor for training radiology residents to interpret mammograms.

MPACT Scores for Roger Azevedo

A = 0
C = 1
A+C = 1
T = 0
G = 0
W = 0
TD = 0
TA = 0
calculated 2010-10-25 15:44:50

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