title: Effects of acute alcohol consumption in older and younger adults: perceived impairment versus psychomotor performance.
abstract: OBJECTIVE
  Perceived impairment and psychomotor performance following acute alcohol administration in older (ages 50-74, n=42; 22 male) and younger (ages 25-35, n=26; 12 male) adults were investigated in this study.
  
  
  METHODS
  Double-blind, placebo-controlled alcohol administration techniques were designed to produce peak levels of breath alcohol concentration consistent with an episode of social drinking (40 mg/100 ml). Behavioral measures (Trail Making Test, Forms A and B), as well as measures of self-reported perceived intoxication and impairment, were administered on the ascending and descending limbs at common time points after beverage ingestion.
  
  
  RESULTS
  Results indicated that psychomotor performance differences did not parallel self-reported levels of perceived impairment. Relative to younger adults, older adults exhibited performance deficits on the ascending limb while simultaneously reporting less perceived impairment. Conversely, on the descending limb, older adults who received alcohol reported more perceived impairment than did those who received placebo, although psychomotor performance between these two groups of older drinkers did not differ. For younger participants, a moderate dose of alcohol facilitated performance on the ascending limb; however, these differences were not reflected on the descending limb.
  
  
  CONCLUSIONS
  These results reinforce the common knowledge that self-reported measures may not provide an accurate reflection of performance outcomes and, importantly, that older adults may be impaired even under a moderate dose of alcohol, although they may not be aware (i.e., report) of this impairment.
authors.affiliation: Neurocognitive Laboratory, Department of Psychology, University of Kentucky, Lexington, Kentucky 40506-0044, USA. rjgilber@ufl.edu
authors.forename: Rebecca
authors.initials: R
authors.lastname: Gilbertson
authors.forename: Natalie A
authors.initials: NA
authors.lastname: Ceballos
authors.forename: Robert
authors.initials: R
authors.lastname: Prather
authors.forename: Sara Jo
authors.initials: SJ
authors.lastname: Nixon
mesh_terms: D000328:Adult; D000375:Aging; D000428:Alcohol Drinking / Q000009:adverse effects* / Q000523:psychology*; D000435:Alcoholic Intoxication / Q000523:psychology*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010919:Placebos; D011597:Psychomotor Performance / Q000187:drug effects*; D012649:Self Concept
chemical_list: D010919:Placebos