Laura Helle

Traditional microscopy instruction versus process-oriented virtual microscopy instruction: a naturalistic experiment with control group.

BackgroundVirtual microscopy is being introduced in medical education as an approach for learning how to interpret information in microscopic specimens. It is, however, far from evident how to incorporate its use into existing teaching practice. The aim of the study was to explore the consequences of introducing virtual microscopy tasks into an undergraduate pathology course in an attempt to render the instruction more process-oriented. The research questions were: 1) How is virtual microscopy perceived by students? 2) Does work on virtual microscopy tasks contribute to improvement in performance in microscopic pathology in comparison with attending assistant-led demonstrations only?MethodDuring a one-week period, an experimental group completed three sets of virtual microscopy homework assignments in addition to attending demonstrations. A control group attended the demonstrations only. Performance in microscopic pathology was measured by a pre-test and a post-test. Student perceptions of regular instruction and virtual microscopy were collected one month later by administering the Inventory of Intrinsic Motivation and open-ended questions.ResultsThe students voiced an appreciation for virtual microscopy for the purposes of the course and for self-study. As for learning gains, the results indicated that learning was speeded up in a subgroup of students consisting of conscientious high achievers.ConclusionsThe enriched instruction model may be suited as such for elective courses following the basic course. However, the instructional model needs further development to be suited for basic courses.

The Effect of Expertise on Eye Movement Behaviour in Medical Image Perception

The present eye-movement study assessed the effect of expertise on eye-movement behaviour during image perception in the medical domain. To this end, radiologists, computed-tomography radiographers and psychology students were exposed to nine volumes of multi-slice, stack-view, axial computed-tomography images from the upper to the lower part of the abdomen with or without abnormality. The images were presented in succession at low, medium or high speed, while the participants had to detect enlarged lymph nodes or other visually more salient abnormalities. The radiologists outperformed both other groups in the detection of enlarged lymph nodes and their eye-movement behaviour also differed from the other groups. Their general strategy was to use saccades of shorter amplitude than the two other participant groups. In the presence of enlarged lymph nodes, they increased the number of fixations on the relevant areas and reverted to even shorter saccades. In volumes containing enlarged lymph nodes, radiologists’ fixation durations were longer in comparison to their fixation durations in volumes without enlarged lymph nodes. More salient abnormalities were detected equally well by radiologists and radiographers, with both groups outperforming psychology students. However, to accomplish this, radiologists actually needed fewer fixations on the relevant areas than the radiographers. On the basis of these results, we argue that expert behaviour is manifested in distinct eye-movement patterns of proactivity, reactivity and suppression, depending on the nature of the task and the presence of abnormalities at any given moment.

Do prior knowledge, personality and visual perceptual ability predict student performance in microscopic pathology?

Medical Education 2010: 44: 621–629

The developmental trajectory of perceived self-regulation, personal interest, and general achievement throughout high school: a longitudinal study.

BACKGROUND Our interest in perceived self-regulation of learning arose in the context of educational reform. After decades of stability, the Finnish high school system underwent reform in the 1990s, with a significant emphasis being placed on promoting student self-regulation of learning. AIMS The purposes of the study were (1) to evaluate changes in the mean level of perceived self-regulation throughout high school and (2) to evaluate the nature of the developmental relations between achievement, perceived self-regulation, and personal interest. SAMPLE The participants consisted of 245 systematically sampled high school students from a mid-sized Finnish city. METHODS T tests for paired samples were employed to assess changes in the level of personal interest and perceived self-regulation. Analysis of the developmental relations was carried out within a structural equations modelling framework. RESULTS The main result was that perceived self-regulation at the beginning of high school predicted not only scholastic achievement at the end of high school over and above prior achievement, but also subsequent personal interest. Additionally, following an international trend, the level of perceived self-regulation decreased from the first to third year of study. CONCLUSIONS The study has important theoretical and practical implications. First, the results suggest that perceived self-regulation and personal interest are only partially explained by achievement. Second, it appears that perceived self-regulation drives personal interest, not the other way around. Finally, ways for teachers and schools to sustain perceived self-regulation throughout the high school years are discussed.