Thirty neurologists and 30 radiologists volunteered to interpret three ambiguous CT scans for the presence or absence of a lacunar infarction in or near the internal capsule. The scans were accompanied – at random – by patient information that was either suggestive or non-suggestive of a stroke. One normal scan with suggestive patient information and four camouflage scans were added. Suggestive information significantly biased the interpretation of one of the ambiguous scans, whereas only a tendency towards bias was found in the others.

Keywords:
Cerebral infarction, Lacunar infarction, Stroke, Computed tomography scan, Observer agreement, Bias, Anchoring
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© 1992 S. Karger AG, Basel
1992
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