The effects of delay duration on visual working memory for orientation

Hongsup Shin, Qijia Zou, Wei Ji Ma

Research output: Contribution to journalArticle

Abstract

We used a delayed-estimation paradigm to characterize the joint effects of set size (one, two, four, or six) and delay duration (1, 2, 3, or 6 s) on visual working memory for orientation. We conducted two experiments: one with delay durations blocked, another with delay durations interleaved. As dependent variables, we examined four model-free metrics of dispersion as well as precision estimates in four simple models. We tested for effects of delay time using analyses of variance, linear regressions, and nested model comparisons. We found significant effects of set size and delay duration on both model-free and model-based measures of dispersion. However, the effect of delay duration was much weaker than that of set size, dependent on the analysis method, and apparent in only a minority of subjects. The highest forgetting slope found in either experiment at any set size was a modest 1.14°/s. As secondary results, we found a low rate of nontarget reports, and significant estimation biases towards oblique orientations (but no dependence of their magnitude on either set size or delay duration). Relative stability of working memory even at higher set sizes is consistent with earlier results for motion direction and spatial frequency. We compare with a recent study that performed a very similar experiment.

Original languageEnglish (US)
Number of pages1
JournalJournal of Vision
Volume17
Issue number14
DOIs
StatePublished - Dec 1 2017

Fingerprint

Short-Term Memory
Linear Models
Analysis of Variance
Direction compound

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

Cite this

The effects of delay duration on visual working memory for orientation. / Shin, Hongsup; Zou, Qijia; Ma, Wei Ji.

In: Journal of Vision, Vol. 17, No. 14, 01.12.2017.

Research output: Contribution to journalArticle

@article{0b7b2943e3cf425f838b9b93e25ac75d,
title = "The effects of delay duration on visual working memory for orientation",
abstract = "We used a delayed-estimation paradigm to characterize the joint effects of set size (one, two, four, or six) and delay duration (1, 2, 3, or 6 s) on visual working memory for orientation. We conducted two experiments: one with delay durations blocked, another with delay durations interleaved. As dependent variables, we examined four model-free metrics of dispersion as well as precision estimates in four simple models. We tested for effects of delay time using analyses of variance, linear regressions, and nested model comparisons. We found significant effects of set size and delay duration on both model-free and model-based measures of dispersion. However, the effect of delay duration was much weaker than that of set size, dependent on the analysis method, and apparent in only a minority of subjects. The highest forgetting slope found in either experiment at any set size was a modest 1.14°/s. As secondary results, we found a low rate of nontarget reports, and significant estimation biases towards oblique orientations (but no dependence of their magnitude on either set size or delay duration). Relative stability of working memory even at higher set sizes is consistent with earlier results for motion direction and spatial frequency. We compare with a recent study that performed a very similar experiment.",
author = "Hongsup Shin and Qijia Zou and Ma, {Wei Ji}",
year = "2017",
month = "12",
day = "1",
doi = "10.1167/17.14.10",
language = "English (US)",
volume = "17",
journal = "Journal of Vision",
issn = "1534-7362",
publisher = "Association for Research in Vision and Ophthalmology Inc.",
number = "14",

}

TY - JOUR

T1 - The effects of delay duration on visual working memory for orientation

AU - Shin, Hongsup

AU - Zou, Qijia

AU - Ma, Wei Ji

PY - 2017/12/1

Y1 - 2017/12/1

N2 - We used a delayed-estimation paradigm to characterize the joint effects of set size (one, two, four, or six) and delay duration (1, 2, 3, or 6 s) on visual working memory for orientation. We conducted two experiments: one with delay durations blocked, another with delay durations interleaved. As dependent variables, we examined four model-free metrics of dispersion as well as precision estimates in four simple models. We tested for effects of delay time using analyses of variance, linear regressions, and nested model comparisons. We found significant effects of set size and delay duration on both model-free and model-based measures of dispersion. However, the effect of delay duration was much weaker than that of set size, dependent on the analysis method, and apparent in only a minority of subjects. The highest forgetting slope found in either experiment at any set size was a modest 1.14°/s. As secondary results, we found a low rate of nontarget reports, and significant estimation biases towards oblique orientations (but no dependence of their magnitude on either set size or delay duration). Relative stability of working memory even at higher set sizes is consistent with earlier results for motion direction and spatial frequency. We compare with a recent study that performed a very similar experiment.

AB - We used a delayed-estimation paradigm to characterize the joint effects of set size (one, two, four, or six) and delay duration (1, 2, 3, or 6 s) on visual working memory for orientation. We conducted two experiments: one with delay durations blocked, another with delay durations interleaved. As dependent variables, we examined four model-free metrics of dispersion as well as precision estimates in four simple models. We tested for effects of delay time using analyses of variance, linear regressions, and nested model comparisons. We found significant effects of set size and delay duration on both model-free and model-based measures of dispersion. However, the effect of delay duration was much weaker than that of set size, dependent on the analysis method, and apparent in only a minority of subjects. The highest forgetting slope found in either experiment at any set size was a modest 1.14°/s. As secondary results, we found a low rate of nontarget reports, and significant estimation biases towards oblique orientations (but no dependence of their magnitude on either set size or delay duration). Relative stability of working memory even at higher set sizes is consistent with earlier results for motion direction and spatial frequency. We compare with a recent study that performed a very similar experiment.

UR - http://www.scopus.com/inward/record.url?scp=85039561860&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85039561860&partnerID=8YFLogxK

U2 - 10.1167/17.14.10

DO - 10.1167/17.14.10

M3 - Article

C2 - 29234786

AN - SCOPUS:85039561860

VL - 17

JO - Journal of Vision

JF - Journal of Vision

SN - 1534-7362

IS - 14

ER -