Age differences in entropy

Primary versus secondary memory

Philip A. Allen, Miron Kaufman, Albert F. Smith, Ruth Propper

Research output: Contribution to journalArticleResearchpeer-review

11 Citations (Scopus)

Abstract

We report a spatial-memory scanning experiment that was used to measure age differences in entropy. A target grid consisting of four adjacent letters followed by the presentation of a single probe letter was presented on each trial. Half of the trials presented the probe stimulus in the same spatial position was the target letter (i.e., the probe letter was always a member of the positive set), and half of the trails transposed the target letter one, two, or three spaces of the right or left of the original target display position (i.e., different trials). The experiment involved blocks of primary- memory and secondary-memory tasks. Reaction-time and error-rate data, as well as entropy analyses and the fitting of an entropy model (based on Allen, Kaufman, Smith, and Propper, in press) to the empirical data indicated that older adults showed higher entropy levels than young adults. These results are interpreted in a 'computational temperature' framework in which older adults' higher computational temperatures result in less efficient spatial, episodic memory functioning.

Original languageEnglish
Pages (from-to)307-336
Number of pages30
JournalExperimental Aging Research
Volume24
Issue number4
DOIs
StatePublished - 1 Oct 1998

Fingerprint

Entropy
Temperature
Episodic Memory
Reaction Time
Young Adult
Letters
Age Differences
Spatial Memory
Experiment
Computational

Cite this

Allen, Philip A. ; Kaufman, Miron ; Smith, Albert F. ; Propper, Ruth. / Age differences in entropy : Primary versus secondary memory. In: Experimental Aging Research. 1998 ; Vol. 24, No. 4. pp. 307-336.
@article{85ccba46f42844e5845093ea4ee7c8b4,
title = "Age differences in entropy: Primary versus secondary memory",
abstract = "We report a spatial-memory scanning experiment that was used to measure age differences in entropy. A target grid consisting of four adjacent letters followed by the presentation of a single probe letter was presented on each trial. Half of the trials presented the probe stimulus in the same spatial position was the target letter (i.e., the probe letter was always a member of the positive set), and half of the trails transposed the target letter one, two, or three spaces of the right or left of the original target display position (i.e., different trials). The experiment involved blocks of primary- memory and secondary-memory tasks. Reaction-time and error-rate data, as well as entropy analyses and the fitting of an entropy model (based on Allen, Kaufman, Smith, and Propper, in press) to the empirical data indicated that older adults showed higher entropy levels than young adults. These results are interpreted in a 'computational temperature' framework in which older adults' higher computational temperatures result in less efficient spatial, episodic memory functioning.",
author = "Allen, {Philip A.} and Miron Kaufman and Smith, {Albert F.} and Ruth Propper",
year = "1998",
month = "10",
day = "1",
doi = "10.1080/036107398244175",
language = "English",
volume = "24",
pages = "307--336",
journal = "Experimental Aging Research",
issn = "0361-073X",
publisher = "Taylor and Francis Ltd.",
number = "4",

}

Age differences in entropy : Primary versus secondary memory. / Allen, Philip A.; Kaufman, Miron; Smith, Albert F.; Propper, Ruth.

In: Experimental Aging Research, Vol. 24, No. 4, 01.10.1998, p. 307-336.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Age differences in entropy

T2 - Primary versus secondary memory

AU - Allen, Philip A.

AU - Kaufman, Miron

AU - Smith, Albert F.

AU - Propper, Ruth

PY - 1998/10/1

Y1 - 1998/10/1

N2 - We report a spatial-memory scanning experiment that was used to measure age differences in entropy. A target grid consisting of four adjacent letters followed by the presentation of a single probe letter was presented on each trial. Half of the trials presented the probe stimulus in the same spatial position was the target letter (i.e., the probe letter was always a member of the positive set), and half of the trails transposed the target letter one, two, or three spaces of the right or left of the original target display position (i.e., different trials). The experiment involved blocks of primary- memory and secondary-memory tasks. Reaction-time and error-rate data, as well as entropy analyses and the fitting of an entropy model (based on Allen, Kaufman, Smith, and Propper, in press) to the empirical data indicated that older adults showed higher entropy levels than young adults. These results are interpreted in a 'computational temperature' framework in which older adults' higher computational temperatures result in less efficient spatial, episodic memory functioning.

AB - We report a spatial-memory scanning experiment that was used to measure age differences in entropy. A target grid consisting of four adjacent letters followed by the presentation of a single probe letter was presented on each trial. Half of the trials presented the probe stimulus in the same spatial position was the target letter (i.e., the probe letter was always a member of the positive set), and half of the trails transposed the target letter one, two, or three spaces of the right or left of the original target display position (i.e., different trials). The experiment involved blocks of primary- memory and secondary-memory tasks. Reaction-time and error-rate data, as well as entropy analyses and the fitting of an entropy model (based on Allen, Kaufman, Smith, and Propper, in press) to the empirical data indicated that older adults showed higher entropy levels than young adults. These results are interpreted in a 'computational temperature' framework in which older adults' higher computational temperatures result in less efficient spatial, episodic memory functioning.

UR - http://www.scopus.com/inward/record.url?scp=0031700945&partnerID=8YFLogxK

U2 - 10.1080/036107398244175

DO - 10.1080/036107398244175

M3 - Article

VL - 24

SP - 307

EP - 336

JO - Experimental Aging Research

JF - Experimental Aging Research

SN - 0361-073X

IS - 4

ER -