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Competition and Cooperation among Relational Memory Representations.

Schwarb H, Watson PD, Campbell K, Shander CL, Monti JM, Cooke GE, Wang JX, Kramer AF, Cohen NJ - PLoS ONE (2015)

Bottom Line: In this task, participants learned unique face-room associations in two distinct contexts (i.e., different colored buildings).Overall, performance was very accurate.This novel task provides a powerful tool for investigating both the unique and interacting contributions of these systems in support of relational memory.

View Article: PubMed Central - PubMed

Affiliation: University of Illinois, Beckman Institute for Advanced Science and Technology, Urbana, IL, United States of America.

ABSTRACT
Mnemonic processing engages multiple systems that cooperate and compete to support task performance. Exploring these systems' interaction requires memory tasks that produce rich data with multiple patterns of performance sensitive to different processing sub-components. Here we present a novel context-dependent relational memory paradigm designed to engage multiple learning and memory systems. In this task, participants learned unique face-room associations in two distinct contexts (i.e., different colored buildings). Faces occupied rooms as determined by an implicit gender-by-side rule structure (e.g., male faces on the left and female faces on the right) and all faces were seen in both contexts. In two experiments, we use behavioral and eye-tracking measures to investigate interactions among different memory representations in both younger and older adult populations; furthermore we link these representations to volumetric variations in hippocampus and ventromedial PFC among older adults. Overall, performance was very accurate. Successful face placement into a studied room systematically varied with hippocampal volume. Selecting the studied room in the wrong context was the most typical error. The proportion of these errors to correct responses positively correlated with ventromedial prefrontal volume. This novel task provides a powerful tool for investigating both the unique and interacting contributions of these systems in support of relational memory.

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Related in: MedlinePlus

Studied room preference.Preference for face placements to the studied room as a proportion of all face placements to a given side of the building. Green bars indicate a preference for the studied room on the context-correct side of the building. Blue bars indicate a preference for the studied room on the context-incorrect side of the building. Data are presented for both the Young Adult and Older Adult groups and standard error bars are shown. The dotted gray line indicates chance-level performance.
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pone.0143832.g006: Studied room preference.Preference for face placements to the studied room as a proportion of all face placements to a given side of the building. Green bars indicate a preference for the studied room on the context-correct side of the building. Blue bars indicate a preference for the studied room on the context-incorrect side of the building. Data are presented for both the Young Adult and Older Adult groups and standard error bars are shown. The dotted gray line indicates chance-level performance.

Mentions: Again, to determine the preference for the studied room over other rooms on a given side of the building, the proportion of studied room placements to total placements was computed for each side of the building. Young adult participants preferred the studied room 60.8% of the time on the CC side and 57.2% of the time on the CI side of the building (Fig 6). Older adult participants preferred the studied room 35.7% of the time on the CC side and 35.3% of the time on the CI side of the building (Fig 6). One-sample t-tests indicated that these studied-room preference were greater than chance (11.1%; p < .001 in all cases). A Side (CC, CI) x Group (Young, Old) repeated measures ANOVA was performed. Neither the main effect of Side, F(1,38) = .30, p = .589, η2 = .008, nor the interaction, F(1,38) = .19, p = .67, η2 = .005, was significant indicating that both groups preferred the studied room to all other rooms similarly on each side of the building. The main effect of Group, F(1,38) = 21.10, p < .001, η2 = .36, was significant with the young adults showing a stronger preference for the studied room than older adults. Again these data suggest that participants showed a preference for the studied room even when they made a CI response.


Competition and Cooperation among Relational Memory Representations.

Schwarb H, Watson PD, Campbell K, Shander CL, Monti JM, Cooke GE, Wang JX, Kramer AF, Cohen NJ - PLoS ONE (2015)

Studied room preference.Preference for face placements to the studied room as a proportion of all face placements to a given side of the building. Green bars indicate a preference for the studied room on the context-correct side of the building. Blue bars indicate a preference for the studied room on the context-incorrect side of the building. Data are presented for both the Young Adult and Older Adult groups and standard error bars are shown. The dotted gray line indicates chance-level performance.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4664414&req=5

pone.0143832.g006: Studied room preference.Preference for face placements to the studied room as a proportion of all face placements to a given side of the building. Green bars indicate a preference for the studied room on the context-correct side of the building. Blue bars indicate a preference for the studied room on the context-incorrect side of the building. Data are presented for both the Young Adult and Older Adult groups and standard error bars are shown. The dotted gray line indicates chance-level performance.
Mentions: Again, to determine the preference for the studied room over other rooms on a given side of the building, the proportion of studied room placements to total placements was computed for each side of the building. Young adult participants preferred the studied room 60.8% of the time on the CC side and 57.2% of the time on the CI side of the building (Fig 6). Older adult participants preferred the studied room 35.7% of the time on the CC side and 35.3% of the time on the CI side of the building (Fig 6). One-sample t-tests indicated that these studied-room preference were greater than chance (11.1%; p < .001 in all cases). A Side (CC, CI) x Group (Young, Old) repeated measures ANOVA was performed. Neither the main effect of Side, F(1,38) = .30, p = .589, η2 = .008, nor the interaction, F(1,38) = .19, p = .67, η2 = .005, was significant indicating that both groups preferred the studied room to all other rooms similarly on each side of the building. The main effect of Group, F(1,38) = 21.10, p < .001, η2 = .36, was significant with the young adults showing a stronger preference for the studied room than older adults. Again these data suggest that participants showed a preference for the studied room even when they made a CI response.

Bottom Line: In this task, participants learned unique face-room associations in two distinct contexts (i.e., different colored buildings).Overall, performance was very accurate.This novel task provides a powerful tool for investigating both the unique and interacting contributions of these systems in support of relational memory.

View Article: PubMed Central - PubMed

Affiliation: University of Illinois, Beckman Institute for Advanced Science and Technology, Urbana, IL, United States of America.

ABSTRACT
Mnemonic processing engages multiple systems that cooperate and compete to support task performance. Exploring these systems' interaction requires memory tasks that produce rich data with multiple patterns of performance sensitive to different processing sub-components. Here we present a novel context-dependent relational memory paradigm designed to engage multiple learning and memory systems. In this task, participants learned unique face-room associations in two distinct contexts (i.e., different colored buildings). Faces occupied rooms as determined by an implicit gender-by-side rule structure (e.g., male faces on the left and female faces on the right) and all faces were seen in both contexts. In two experiments, we use behavioral and eye-tracking measures to investigate interactions among different memory representations in both younger and older adult populations; furthermore we link these representations to volumetric variations in hippocampus and ventromedial PFC among older adults. Overall, performance was very accurate. Successful face placement into a studied room systematically varied with hippocampal volume. Selecting the studied room in the wrong context was the most typical error. The proportion of these errors to correct responses positively correlated with ventromedial prefrontal volume. This novel task provides a powerful tool for investigating both the unique and interacting contributions of these systems in support of relational memory.

Show MeSH
Related in: MedlinePlus