Advanced

Pupil dilation reflects interference during memory retrieval

Bjernestedt, Amanda; Johansson, Roger LU ; PÄRNAMETS, PHILIP LU and Johansson, Mikael LU (2016) 6th International Conference on Memory
Abstract
We demonstrate that pupillometry can be used to track memory interference independent of explicit responses. Pupil diameter was recorded
throughout encoding and retrieval of words from the same category over 4 trials, causing buildup of proactive interference (PI). In a contrasting
condition, the category was switched on the 4th trial, causing release from interference (RI). Pupil dilation systematically increased for both
conditions as interference built up and retrieval performance declined. Critically, in trial 4 the RI condition resulted in improved retrieval
performance, with significantly smaller pupil dilation than in the PI condition, where performance continued to decline. Principal component analysis
revealed... (More)
We demonstrate that pupillometry can be used to track memory interference independent of explicit responses. Pupil diameter was recorded
throughout encoding and retrieval of words from the same category over 4 trials, causing buildup of proactive interference (PI). In a contrasting
condition, the category was switched on the 4th trial, causing release from interference (RI). Pupil dilation systematically increased for both
conditions as interference built up and retrieval performance declined. Critically, in trial 4 the RI condition resulted in improved retrieval
performance, with significantly smaller pupil dilation than in the PI condition, where performance continued to decline. Principal component analysis
revealed an early dilation peak possibly related to control of interference, and a later component possibly linked to memory search. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to conference
publication status
published
subject
keywords
pupillometry, memory retrieval, Interference, principal component analysis
conference name
6th International Conference on Memory
language
English
LU publication?
yes
id
003398aa-61f2-4b35-94d1-910182e8b3c3
date added to LUP
2016-08-17 11:39:48
date last changed
2016-08-18 08:32:22
@misc{003398aa-61f2-4b35-94d1-910182e8b3c3,
  abstract     = {We demonstrate that pupillometry can be used to track memory interference independent of explicit responses. Pupil diameter was recorded<br/>throughout encoding and retrieval of words from the same category over 4 trials, causing buildup of proactive interference (PI). In a contrasting<br/>condition, the category was switched on the 4th trial, causing release from interference (RI). Pupil dilation systematically increased for both<br/>conditions as interference built up and retrieval performance declined. Critically, in trial 4 the RI condition resulted in improved retrieval<br/>performance, with significantly smaller pupil dilation than in the PI condition, where performance continued to decline. Principal component analysis<br/>revealed an early dilation peak possibly related to control of interference, and a later component possibly linked to memory search.},
  author       = {Bjernestedt, Amanda and Johansson, Roger and PÄRNAMETS, PHILIP and Johansson, Mikael},
  keyword      = {pupillometry,memory retrieval,Interference,principal component analysis},
  language     = {eng},
  month        = {07},
  title        = {Pupil dilation reflects interference during memory retrieval},
  year         = {2016},
}