title: Time Perception in Mild Cognitive Impairment: Interval Length and Subjective Passage of Time.
abstract: Patients with mild cognitive impairment (MCI) may have difficulties in time perception, which in turn might contribute to some of their symptoms, especially memory deficits. The aim of this study was to evaluate perception of interval length and subjective passage of time in MCI patients as compared to healthy controls.
  
  
  
  Fifty-five MCI patients and 57 healthy controls underwent an experimental protocol for time perception on interval length, a questionnaire for the subjective passage of time and a neuropsychological evaluation.
  
  
  
  MCI patients presented no changes in the perception of interval length. However, for MCI patients, time seemed to pass more slowly than it did for controls. This experience was significantly correlated with memory deficits but not with performance in executive tests, nor with complaints of depression or anxiety.
  
  
  
  Memory deficits do not affect the perception of interval length, but are associated with alterations in the subjective passage of time. (JINS, 2016, 22, 755-764).
authors.affiliation: 1Institute of Molecular Medicine and Faculty of Medicine,University of Lisbon,Lisbon,Portugal.
authors.forename: Sara
authors.initials: S
authors.lastname: Coelho
authors.affiliation: 1Institute of Molecular Medicine and Faculty of Medicine,University of Lisbon,Lisbon,Portugal.
authors.forename: Manuela
authors.initials: M
authors.lastname: Guerreiro
authors.affiliation: 1Institute of Molecular Medicine and Faculty of Medicine,University of Lisbon,Lisbon,Portugal.
authors.forename: Catarina
authors.initials: C
authors.lastname: Chester
authors.affiliation: 2Cognitive Neuroscience Research Group,Department of Psychology and Educational Sciences and Centre for Biomedical Research (CBMR),University of Algarve,Faro,Portugal.
authors.forename: Dina
authors.initials: D
authors.lastname: Silva
authors.affiliation: 3William James Center for Research,ISPA-IU,Lisboa,Portugal.
authors.forename: João
authors.initials: J
authors.lastname: Maroco
authors.affiliation: 1Institute of Molecular Medicine and Faculty of Medicine,University of Lisbon,Lisbon,Portugal.
authors.forename: Miguel
authors.initials: M
authors.lastname: Coelho
authors.affiliation: 4Institute for Cognitive Sciences and Technologies of the CNR,Rome,Italy.
authors.forename: Fabio
authors.initials: F
authors.lastname: Paglieri
authors.affiliation: 1Institute of Molecular Medicine and Faculty of Medicine,University of Lisbon,Lisbon,Portugal.
authors.forename: Alexandre
authors.initials: A
authors.lastname: de Mendonça
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D060825:Cognitive Dysfunction / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008569:Memory Disorders / Q000503:physiopathology*; D008875:Middle Aged; D013998:Time Perception / Q000502:physiology*
keywords: Aging; Cognitive decline; Memory; Perceived speed of time judgments; Time experiences; Time interval