title: Aging and switching the focus of attention in working memory: age differences in item availability but not in item accessibility.
abstract: OBJECTIVE
  To investigate age differences in working memory processing, specifically the accuracy of retrieval of items stored outside the immediate focus of attention.
  
  
  METHODS
  Younger and older adults were tested on a modified N-Back task with probes presented in an unpredictable order (implying also that some trials necessitated a switch in the focus of attention and others that did not).
  
  
  RESULTS
  Older adults showed intact item accessibility, that is, after taking general slowing into account, older adults were as fast as younger adults in locating the item in working memory. We found age differences, however, in item availability: Older adults were less likely to correctly retrieve items stored outside the focus of attention. Smaller age differences in availability were also found for items stored inside the focus of attention.
  
  
  CONCLUSIONS
  These results strongly suggest that item availability is a cognitive primitive that is not reducible to more basic constructs such as item accessibility or simple speed of processing.
authors.affiliation: Department of Psychology, Rice University, 472 Sewall Hall, MS-25, Houston, TX 77251, USA. cbasak@rice.edu
authors.forename: Chandramallika
authors.initials: C
authors.lastname: Basak
authors.forename: Paul
authors.initials: P
authors.lastname: Verhaeghen
mesh_terms: D000293:Adolescent; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000523:psychology*; D001288:Attention; D003118:Color Perception; D003463:Cues; D004192:Discrimination, Psychological; D056344:Executive Function; D005260:Female; D006801:Humans; D008297:Male; D008570:Memory, Short-Term; D008875:Middle Aged; D009949:Orientation; D010364:Pattern Recognition, Visual; D011597:Psychomotor Performance; D011930:Reaction Time; D012691:Serial Learning; D055815:Young Adult