Abstract
Abstract. This article explores the possibility of differentiating between patients suffering from Alzheimer’s disease (AD) and patients with other kinds of dementia by focusing on false alarms (FAs) on a picture recognition task (PRT). In Study 1, we compared AD and non-AD patients on the PRT and found that FAs discriminate well between these groups. Study 2 served to improve the discriminatory power of the FA score on the picture recognition task by adding associated pairs. Here, too, the FA score differentiated well between AD and non-AD patients, though the discriminatory power did not improve. The findings suggest that AD patients show a liberal response bias. Taken together, these studies suggest that FAs in picture recognition are of major importance for the clinical diagnosis of AD.
Zusammenfassung. Abstract: Dieser Artikel geht der Frage nach, ob sich Patienten mit Alzheimer Demenz (AD) und Patienten mit anderen Formen von Demenz mit Hilfe „Falscher Alarme“ (FA) bei einer Bilderkennungsaufgabe unterscheiden lassen. In Studie 1 verglichen wir AD- und Nicht-AD-Patienten im Hinblick auf die Bilderkennungsaufgabe und stellten fest, dass die FA-Werte gut zwischen beiden Gruppen differenzierten. Studie 2 zielte auf die Steigerung des Unterscheidungspotentials von FA-Werten durch die Hinzunahme weiterer Paare. Auch hier ließen sich AD- und Nicht-AD-Patienten gut mit Hilfe der FA-Werte unterscheiden, auch wenn das Differenzierungspotential sich nicht steigerte. Die Ergebnisse legen nahe, dass AD-Patienten einen großzügigen Reaktionsbias zeigen. Zusammengenommen stärken beide Studien die Hypothese, dass FAs bei der Bilderkennung für die klinische Diagnose von AD von großer Bedeutung sind.
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