title: Risk for Mild Cognitive Impairment Is Associated With Semantic Integration Deficits in Sentence Processing and Memory.
abstract: OBJECTIVE
  We examined the degree to which online sentence processing and offline sentence memory differed among older adults who showed risk for amnestic and nonamnestic varieties of mild cognitive impairment (MCI), based on psychometric classification.
  
  
  METHODS
  Participants (N = 439) read a series of sentences in a self-paced word-by-word reading paradigm for subsequent recall and completed a standardized cognitive test battery. Participants were classified into 3 groups: unimpaired controls (N = 281), amnestic MCI (N = 94), or nonamnestic MCI (N = 64).
  
  
  RESULTS
  Relative to controls, both MCI groups had poorer sentence memory and showed reduced sentence wrap-up effects, indicating reduced allocation to semantic integration processes. Wrap-up effects predicted subsequent recall in the control and nonamnestic groups. The amnestic MCI group showed poorer recall than the nonamnestic MCI group, and only the amnestic MCI group showed no relationship between sentence wrap-up and recall.
  
  
  CONCLUSIONS
  Our findings suggest that psychometrically defined sub-types of MCI are associated with unique deficits in sentence processing and can differentiate between the engagement of attentional resources during reading and the effectiveness of engaging attentional resources in producing improved memory.
authors.affiliation: The Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign. payne12@illinois.edu.
authors.forename: Brennan R
authors.initials: BR
authors.lastname: Payne
authors.affiliation: The Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign.
authors.forename: Elizabeth A L
authors.initials: EA
authors.lastname: Stine-Morrow
mesh_terms: D000368:Aged; D060825:Cognitive Dysfunction / Q000453:epidemiology* / Q000209:etiology*; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D008569:Memory Disorders / Q000150:complications*; D009483:Neuropsychological Tests; D012307:Risk Factors
keywords: Aging; Mild cognitive impairment; Reading; Sentence memory; Sentence processing