2.2. Catherine Bergego Scale

The CBS is a functional neglect assessment that also has a parallel questionnaire, administered to stroke survivors, to determine whether they can self-assess neglect [22]. The CBS is based on the direct observation of patient function in 10 actual situations. For each item, a 4-point scale ranging from 0 (no ignore) to 3 (severe ignore) was used. If no spatial bias was observed, a score of 0 was given. For mild neglect, a score of 1 was given, and the patient always searched the right hemispace first, slowly to the left, and occasionally showed a left-sided loss. A score of 2 (moderate neglect) was given if the patient showed a clear and constant left dropout or collision. A score of 3 (severe neglect) was given when the patient was not able to fully explore the left hemispace. The total score was calculated (range, 0–30). For items that could not be measured, the average score of the measured items was entered. In this study, the CBS scores were assigned by an occupational therapist.

An anosognosia score was calculated by recording the difference between the observer’s assessment scores and the patient’s self-assessment scores. The anosognosia score is of a positive value if the patient has a higher CBS score than the rater. This means that patients are unaware of their problems caused by USN. However, a negative value means that patients overestimate their spatial problems. Both of these can be considered invalid self-assessments. In this study, both the usual anosognosia score and the absolute value of the anosognosia score were calculated.