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Listening for recollection: a multi-voxel pattern analysis of recognition memory retrieval strategies.

Quamme JR, Weiss DJ, Norman KA - Front Hum Neurosci (2010)

Bottom Line: We looked for brain regions that met the following criteria: (1) Distinct neural patterns should be present when subjects are instructed to rely on recollection vs. familiarity, and (2) fluctuations in these neural patterns should be related to recognition behavior in the manner predicted by dual-process theories of recognition: Specifically, the presence of the recollection pattern during the pre-stimulus interval (indicating that subjects are "listening for recollection" at that moment) should be associated with a selective decrease in false alarms to related lures.We found that pre-stimulus activity in the right supramarginal gyrus met all of these criteria, suggesting that this region proactively establishes an internally directed attentional state that fosters recollection.We also found other regions (e.g., left middle temporal gyrus) where the pattern of neural activity was related to subjects' responding to related lures after stimulus onset (but not before), suggesting that these regions implement processes that are engaged in a reactive fashion to boost recollection.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, Grand Valley State University Allendale, MI, USA.

ABSTRACT
Recent studies of recognition memory indicate that subjects can strategically vary how much they rely on recollection of specific details vs. feelings of familiarity when making recognition judgments. One possible explanation of these results is that subjects can establish an internally directed attentional state ("listening for recollection") that enhances retrieval of studied details; fluctuations in this attentional state over time should be associated with fluctuations in subjects' recognition behavior. In this study, we used multi-voxel pattern analysis of fMRI data to identify brain regions that are involved in listening for recollection. We looked for brain regions that met the following criteria: (1) Distinct neural patterns should be present when subjects are instructed to rely on recollection vs. familiarity, and (2) fluctuations in these neural patterns should be related to recognition behavior in the manner predicted by dual-process theories of recognition: Specifically, the presence of the recollection pattern during the pre-stimulus interval (indicating that subjects are "listening for recollection" at that moment) should be associated with a selective decrease in false alarms to related lures. We found that pre-stimulus activity in the right supramarginal gyrus met all of these criteria, suggesting that this region proactively establishes an internally directed attentional state that fosters recollection. We also found other regions (e.g., left middle temporal gyrus) where the pattern of neural activity was related to subjects' responding to related lures after stimulus onset (but not before), suggesting that these regions implement processes that are engaged in a reactive fashion to boost recollection.

No MeSH data available.


Related in: MedlinePlus

Sphere clusters passing our statistical tests for the AVG analysis at family-wise error rate <0.05. Values plotted at each voxel are the average number of significant spheres in which the voxel was included, scaled from red to yellow, with yellow regions indicating that a voxel appeared in an average of 10 or more significant spheres. Sphere results were computed separately for four time windows relative to the test stimulus onset.
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Figure 5: Sphere clusters passing our statistical tests for the AVG analysis at family-wise error rate <0.05. Values plotted at each voxel are the average number of significant spheres in which the voxel was included, scaled from red to yellow, with yellow regions indicating that a voxel appeared in an average of 10 or more significant spheres. Sphere results were computed separately for four time windows relative to the test stimulus onset.

Mentions: The locations of significant sphere clusters (i.e., sphere clusters meeting all of our statistical criteria) are shown in Figure 4 (for MVPA) and Figure 5 (for AVG) for each of four time windows. The figures show, for each voxel, the average number of significant spheres that included that voxel. That is, the figures indicate the density of significant spheres rather than degree of significance; lighter colors indicate higher density (see Supplementary Material for a detailed description of how these density maps were created). The locations and extent of the significant sphere clusters are summarized in Table 2 for MVPA and Table 3 for AVG analyses. As is evident from the Figures 4 and 5 and Tables 2 and 3, there were differences in the patterns observed across time windows and analysis methods (MVPA vs. AVG).


Listening for recollection: a multi-voxel pattern analysis of recognition memory retrieval strategies.

Quamme JR, Weiss DJ, Norman KA - Front Hum Neurosci (2010)

Sphere clusters passing our statistical tests for the AVG analysis at family-wise error rate <0.05. Values plotted at each voxel are the average number of significant spheres in which the voxel was included, scaled from red to yellow, with yellow regions indicating that a voxel appeared in an average of 10 or more significant spheres. Sphere results were computed separately for four time windows relative to the test stimulus onset.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2927239&req=5

Figure 5: Sphere clusters passing our statistical tests for the AVG analysis at family-wise error rate <0.05. Values plotted at each voxel are the average number of significant spheres in which the voxel was included, scaled from red to yellow, with yellow regions indicating that a voxel appeared in an average of 10 or more significant spheres. Sphere results were computed separately for four time windows relative to the test stimulus onset.
Mentions: The locations of significant sphere clusters (i.e., sphere clusters meeting all of our statistical criteria) are shown in Figure 4 (for MVPA) and Figure 5 (for AVG) for each of four time windows. The figures show, for each voxel, the average number of significant spheres that included that voxel. That is, the figures indicate the density of significant spheres rather than degree of significance; lighter colors indicate higher density (see Supplementary Material for a detailed description of how these density maps were created). The locations and extent of the significant sphere clusters are summarized in Table 2 for MVPA and Table 3 for AVG analyses. As is evident from the Figures 4 and 5 and Tables 2 and 3, there were differences in the patterns observed across time windows and analysis methods (MVPA vs. AVG).

Bottom Line: We looked for brain regions that met the following criteria: (1) Distinct neural patterns should be present when subjects are instructed to rely on recollection vs. familiarity, and (2) fluctuations in these neural patterns should be related to recognition behavior in the manner predicted by dual-process theories of recognition: Specifically, the presence of the recollection pattern during the pre-stimulus interval (indicating that subjects are "listening for recollection" at that moment) should be associated with a selective decrease in false alarms to related lures.We found that pre-stimulus activity in the right supramarginal gyrus met all of these criteria, suggesting that this region proactively establishes an internally directed attentional state that fosters recollection.We also found other regions (e.g., left middle temporal gyrus) where the pattern of neural activity was related to subjects' responding to related lures after stimulus onset (but not before), suggesting that these regions implement processes that are engaged in a reactive fashion to boost recollection.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, Grand Valley State University Allendale, MI, USA.

ABSTRACT
Recent studies of recognition memory indicate that subjects can strategically vary how much they rely on recollection of specific details vs. feelings of familiarity when making recognition judgments. One possible explanation of these results is that subjects can establish an internally directed attentional state ("listening for recollection") that enhances retrieval of studied details; fluctuations in this attentional state over time should be associated with fluctuations in subjects' recognition behavior. In this study, we used multi-voxel pattern analysis of fMRI data to identify brain regions that are involved in listening for recollection. We looked for brain regions that met the following criteria: (1) Distinct neural patterns should be present when subjects are instructed to rely on recollection vs. familiarity, and (2) fluctuations in these neural patterns should be related to recognition behavior in the manner predicted by dual-process theories of recognition: Specifically, the presence of the recollection pattern during the pre-stimulus interval (indicating that subjects are "listening for recollection" at that moment) should be associated with a selective decrease in false alarms to related lures. We found that pre-stimulus activity in the right supramarginal gyrus met all of these criteria, suggesting that this region proactively establishes an internally directed attentional state that fosters recollection. We also found other regions (e.g., left middle temporal gyrus) where the pattern of neural activity was related to subjects' responding to related lures after stimulus onset (but not before), suggesting that these regions implement processes that are engaged in a reactive fashion to boost recollection.

No MeSH data available.


Related in: MedlinePlus