Design of training schedules for medical-image readers: the effects of variability and difficulty levels of the training stimuli

Ian R. L. Davies; Penny Roling; Paul T. Sowden; Sean M. Hammond; Robert C. Chivers

doi:10.1117/12.236854

27 March 1996 Design of training schedules for medical-image readers: the effects of variability and difficulty levels of the training stimuli

Ian R. L. Davies, Penny Roling, Paul T. Sowden, Sean M. Hammond, Robert C. Chivers

Author Affiliations +

Proceedings Volume 2712, Medical Imaging 1996: Image Perception; (1996) https://doi.org/10.1117/12.236854
Event: Medical Imaging 1996, 1996, Newport Beach, CA, United States

Abstract

We report two studies on the design of training schedules for medical-image readers. Experiment 1 required subjects to learn to classify ultrasound images of six different phantoms; one group of subjects trained on images that varied on just two of the four possible dimensions of variation on each day, while the other group trained on images that varied on all four dimensions of variation each day. Performance improved on each day, and learning transferred to novel stimuli shown on successive days. Initially performance was worse for the high-variation group, but by the final session they had reached the same level as the restricted variation group. Within-category similarity increased after training and inter-category similarity decreased. In the second experiment, the stimuli were x-rays of perspex blocks with holes drilled in one of five possible locations. The subject's task was to search for the image- feature produced by the hole (a dark spot). One group of subjects judged 'easy' images for the first four days, and then switched to judgments of 'difficult' holes on the final day, while a second group underwent the reverse order. Although both groups improved, the group that had trained on the easy stimuli showed positive transfer to the more difficult stimuli, but the group that trained on the difficult stimuli showed no transfer to the easy stimuli.

Citation Download Citation

Ian R. L. Davies, Penny Roling, Paul T. Sowden, Sean M. Hammond, and Robert C. Chivers "Design of training schedules for medical-image readers: the effects of variability and difficulty levels of the training stimuli", Proc. SPIE 2712, Medical Imaging 1996: Image Perception, (27 March 1996); https://doi.org/10.1117/12.236854

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