Intrusions in Alzheimer's disease in immediate and delayed memory as a function of presentation modality.

Young and elderly participants, and participants with Alzheimer's disease (AD) were compared via the suffix paradigm, where a not-to-be-recalled item is appended onto sequences to be immediately recalled. This task was followed by delayed tasks. In immediate recall, AD subjects showed both extralist and suffix intrusions.

Suffix effects and intrusion errors in young and elderly subjects.

Potential age differences in selective attention and response inhibition in 16 young and 16 elderly college students were explored using the stimulus suffix paradigm. Subjects were presented with auditory and visual lists of seven-letter sequences. Half the lists were appended with a letter suffix that was not to be recalled.

Visual and auditory modality and suffix effects in young and elderly adults.

Research has shown that elderly as compared with young adults show relative deficits both in processing visually as compared with auditorily presented stimuli and in tasks having attentional components. In this study, visual and auditory presentation was compared in young and elderly adults using the suffix paradigm in which the control condition involves immediate serial recall and the experimental condition, a suffix, a not-to-be-remembered final item. The standard finding in this paradigm is called the modality effect, superior auditory as compared with visual performance in the control condition which is localized at the end of the sequence.