word completion task
In this test, subjects are presented with a three-letter word-fragment and asked to write down the first word they think of, or that had appeared on the previously presented list. Subsequently, subjects are asked to complete fragments. The score is the number of completed words that were elicited.
Also referred to as amyloid-β (abbreviated to Aβ). It is a peptide derived from the larger amyloid precursor protein (APP) and is the principal component of amyloid fibrils. The specific role of β-amyloid is unclear, but it is thought that amyloid deposits may cause neurons to degenerate. Amyloid deposits also occur in the brains of older Down’s syndrome patients.