The Bells Test: A Quantitative and Qualitative Test For Visual Neglect

The Bells Test: A Quantitative and Qualitative Test For Visual Neglect

Volume XI, 2/1989 | LOUISE GAUTHIER, FRANCOIS DEHAUT, YVES JOANETTE
The Bells Test is a cancellation task that allows for both quantitative and qualitative evaluation of visual neglect. It enables the rapid visualization and quantification of the spatial distribution of omitted targets. The test also provides qualitative information on the subject's visual scanning pattern, offering insight into how the task is performed. The Bells Test is more dynamic and sensitive for detecting mild and moderate visual neglect. The test involves a 21.5 x 28 cm sheet with 35 targets (bells) distributed equally in 7 columns. Each column contains 5 targets and 40 distractors. The subject is asked to circle all the bells. The test is administered with the subject seated comfortably, and the examiner provides instructions. The subject is asked to circle all bells without losing time and to avoid moving or bending the trunk. The examiner records the order of circling and the approximate location of each bell. If the subject stops before all bells are circled, the examiner gives one incitement to verify again. The Bells Test is compared to other tests like Albert's Test. The test is more sensitive for detecting moderate and mild neglect due to the presence of distractors. The test allows for a better understanding of the subject's visual scanning strategy, which can be visualized through computerized graphics. The test is more suitable for later stages of recovery when visual neglect may be regressing. A preliminary normative study was conducted on 59 right-handed subjects, including 20 controls, 19 right brain damaged (RBD), and 20 left brain damaged (LBD). The results showed significant differences in the number of omissions between groups. RBD subjects had more omissions in the left field compared to the right. The Bells Test is sensitive for detecting mild and moderate neglect and provides a dynamic picture of how the test is performed. It is more suitable for later stages of recovery when visual neglect may be regressing. The test is a complement to other cancellation tasks and provides valuable information on the subject's visual scanning strategy.The Bells Test is a cancellation task that allows for both quantitative and qualitative evaluation of visual neglect. It enables the rapid visualization and quantification of the spatial distribution of omitted targets. The test also provides qualitative information on the subject's visual scanning pattern, offering insight into how the task is performed. The Bells Test is more dynamic and sensitive for detecting mild and moderate visual neglect. The test involves a 21.5 x 28 cm sheet with 35 targets (bells) distributed equally in 7 columns. Each column contains 5 targets and 40 distractors. The subject is asked to circle all the bells. The test is administered with the subject seated comfortably, and the examiner provides instructions. The subject is asked to circle all bells without losing time and to avoid moving or bending the trunk. The examiner records the order of circling and the approximate location of each bell. If the subject stops before all bells are circled, the examiner gives one incitement to verify again. The Bells Test is compared to other tests like Albert's Test. The test is more sensitive for detecting moderate and mild neglect due to the presence of distractors. The test allows for a better understanding of the subject's visual scanning strategy, which can be visualized through computerized graphics. The test is more suitable for later stages of recovery when visual neglect may be regressing. A preliminary normative study was conducted on 59 right-handed subjects, including 20 controls, 19 right brain damaged (RBD), and 20 left brain damaged (LBD). The results showed significant differences in the number of omissions between groups. RBD subjects had more omissions in the left field compared to the right. The Bells Test is sensitive for detecting mild and moderate neglect and provides a dynamic picture of how the test is performed. It is more suitable for later stages of recovery when visual neglect may be regressing. The test is a complement to other cancellation tasks and provides valuable information on the subject's visual scanning strategy.
Reach us at info@futurestudyspace.com
[slides] The Bells Test%3A A quantitative and qualitative test for visual neglect. | StudySpace