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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

Design modifications used in Experiment 2.(a) General display information and resulting regions of interest. (b) Test phase design and timing information. Orange boxes indicate screens for which eye-tracking data was collected.
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pone.0143832.g002: Design modifications used in Experiment 2.(a) General display information and resulting regions of interest. (b) Test phase design and timing information. Orange boxes indicate screens for which eye-tracking data was collected.

Mentions: The stimuli were identical to Experiment 1 with four exceptions: (1) An additional column of rooms was added to each building such that there were 3 rows (“floors”) of 7 rooms each and the entire building subtended 29.5° x 16.9° of visual angle (Fig 2a). (2) There was a gradation in shade across columns that radiated out from the center column. (3) During each study trial, participants answered the encoding question, “On which side of the building does the face appear?” They indicated left or right with a button push. (4) Thirty male and 30 female full-color face images were selected from our face database (see [49]) and each face was sized to approximately 2.6° x 3.1° of visual angle (“small”; for the study phase and latter portion of the test phase) and approximately 6.9° x 7.9° of visual angle (“large”; for the initial portion of the test phase). As in Experiment 1, the order in which the different building contexts appeared was counterbalanced across participants; and the gender-by-side assignment (e.g., males on left in the blue building context) was also counterbalanced across participants. Counterbalancing across participants ensured that each room was occupied equally often and each face-room pairing was tested an equal number of times.


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)

Design modifications used in Experiment 2.(a) General display information and resulting regions of interest. (b) Test phase design and timing information. Orange boxes indicate screens for which eye-tracking data was collected.
© Copyright Policy
Related In: Results  -  Collection

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

pone.0143832.g002: Design modifications used in Experiment 2.(a) General display information and resulting regions of interest. (b) Test phase design and timing information. Orange boxes indicate screens for which eye-tracking data was collected.
Mentions: The stimuli were identical to Experiment 1 with four exceptions: (1) An additional column of rooms was added to each building such that there were 3 rows (“floors”) of 7 rooms each and the entire building subtended 29.5° x 16.9° of visual angle (Fig 2a). (2) There was a gradation in shade across columns that radiated out from the center column. (3) During each study trial, participants answered the encoding question, “On which side of the building does the face appear?” They indicated left or right with a button push. (4) Thirty male and 30 female full-color face images were selected from our face database (see [49]) and each face was sized to approximately 2.6° x 3.1° of visual angle (“small”; for the study phase and latter portion of the test phase) and approximately 6.9° x 7.9° of visual angle (“large”; for the initial portion of the test phase). As in Experiment 1, the order in which the different building contexts appeared was counterbalanced across participants; and the gender-by-side assignment (e.g., males on left in the blue building context) was also counterbalanced across participants. Counterbalancing across participants ensured that each room was occupied equally often and each face-room pairing was tested an equal number of times.

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