Ted Kelly - Revision history

imported>Psych204B: /* Conclusion */

2010-03-20T04:56:22Z

Conclusion

← Older revision		Revision as of 04:56, 20 March 2010
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	= Conclusion =		= Conclusion =
	MVPs on both medial and lateral ROIs provide further evidence that previous ROI analyses has been correct in assuming that the FFA is located in the lateral part of the VTC. Adult MVPs show better distinctness for faces vs non-face stimuli than adolescents in both sides of the VTC although this distinctness is more pronounced and statistically significant in the lateral VTC.		MVPs on both medial and lateral ROIs provide further evidence that previous ROI analyses has been correct in assuming that the FFA is located in the lateral part of the VTC. Adult MVPs show better distinctness for faces vs non-face stimuli than adolescents in both sides of the VTC although this distinctness is more pronounced and statistically significant in the lateral VTC.
			It appears as though the ROI hypothesis is holding true but we cannot rule out the pattern analysis hypothesis quite yet. More importantly, using pattern analysis in tandem with ROI analysis provides a more thorough investigation of the areas in question and neither technique should be ruled out when trying to localize novel brain regions.

	ROIs may need to be redrawn due to the activation of the PPA in the medial part of the lateral VTC which we should not see. This could be accomplished by using the MVPs to redraw the division between the lateral and medial VTC in all the ROIs or the PPA could be subtracted out of the lateral VTC ROIs possibly saving time.		ROIs may need to be redrawn due to the activation of the PPA in the medial part of the lateral VTC which we should not see. This could be accomplished by using the MVPs to redraw the division between the lateral and medial VTC in all the ROIs or the PPA could be subtracted out of the lateral VTC ROIs possibly saving time.

imported>Psych204B: /* Implications */

2010-03-20T04:53:03Z

Implications

← Older revision		Revision as of 04:53, 20 March 2010
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	Using the evidence obtained in this analyses, further analyses is needed of the lateral part of VTC to better define location and growth of the FFA. One idea would be to create an ROI with further divisions in the lateral VTC and subtract out the highest activations in the lateral VTC (what we think is the FFA area) to look at activations in rest of the lateral VTC without them. Running a multi voxel pattern analyses on the lateral VTC without the FFA could reveal new findings.		Using the evidence obtained in this analyses, further analyses is needed of the lateral part of VTC to better define location and growth of the FFA. One idea would be to create an ROI with further divisions in the lateral VTC and subtract out the highest activations in the lateral VTC (what we think is the FFA area) to look at activations in rest of the lateral VTC without them. Running a multi voxel pattern analyses on the lateral VTC without the FFA could reveal new findings.
	~~It appears as though the ROI hypothesis is holding true but we cannot rule out the pattern analysis hypothesis quite yet.~~ At some point we want to correlate findings to behavior outside the scanner (increased memory for faces, perceptual discrimination for faces)		At some point we want to correlate findings to behavior outside the scanner (increased memory for faces, perceptual discrimination for faces)

	= References - Resources and related work =		= References - Resources and related work =

imported>Psych204B at 04:49, 20 March 2010

2010-03-20T04:49:11Z

← Older revision		Revision as of 04:49, 20 March 2010
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	ROIs may need to be redrawn due to the activation of the PPA in the medial part of the lateral VTC which we should not see. This could be accomplished by using the MVPs to redraw the division between the lateral and medial VTC in all the ROIs or the PPA could be subtracted out of the lateral VTC ROIs possibly saving time.		ROIs may need to be redrawn due to the activation of the PPA in the medial part of the lateral VTC which we should not see. This could be accomplished by using the MVPs to redraw the division between the lateral and medial VTC in all the ROIs or the PPA could be subtracted out of the lateral VTC ROIs possibly saving time.

			= Implications =

	Using the evidence obtained in this analyses, further analyses is needed of the lateral part of VTC to better define location and growth of the FFA. One idea would be to create an ROI with further divisions in the lateral VTC and subtract out the highest activations in the lateral VTC (what we think is the FFA area) to look at activations in rest of the lateral VTC without them. Running a multi voxel pattern analyses on the lateral VTC without the FFA could reveal new findings.		Using the evidence obtained in this analyses, further analyses is needed of the lateral part of VTC to better define location and growth of the FFA. One idea would be to create an ROI with further divisions in the lateral VTC and subtract out the highest activations in the lateral VTC (what we think is the FFA area) to look at activations in rest of the lateral VTC without them. Running a multi voxel pattern analyses on the lateral VTC without the FFA could reveal new findings.

imported>Psych204B: /* Conclusion */

2010-03-20T04:47:38Z

Conclusion

← Older revision		Revision as of 04:47, 20 March 2010
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	= Conclusion =		= Conclusion =
	MVPs on both medial and lateral ROIs provide further evidence that previous ROI analyses has been correct in assuming that the FFA is located in the lateral part of the VTC. Adult MVPs show better distinctness for faces vs non-face stimuli than adolescents in both sides of VTC although this distinctness is more pronounced and statistically significant in the lateral VTC.		MVPs on both medial and lateral ROIs provide further evidence that previous ROI analyses has been correct in assuming that the FFA is located in the lateral part of the VTC. Adult MVPs show better distinctness for faces vs non-face stimuli than adolescents in both sides of the VTC although this distinctness is more pronounced and statistically significant in the lateral VTC.

	ROIs may need to be redrawn due to the activation of the PPA in the medial part of the lateral VTC which we should not see. This could be accomplished by using the MVPs to redraw the division between the lateral and medial VTC in all the ROIs or the PPA could be subtracted out of the lateral VTC ROIs possibly saving time.		ROIs may need to be redrawn due to the activation of the PPA in the medial part of the lateral VTC which we should not see. This could be accomplished by using the MVPs to redraw the division between the lateral and medial VTC in all the ROIs or the PPA could be subtracted out of the lateral VTC ROIs possibly saving time.

	Using the evidence obtained in this analyses, further analyses is needed of the lateral part of VTC to better define location and growth of the FFA. One idea would be to create an ROI with further divisions in the lateral VTC and subtract out the highest activations in lateral VTC (what we think is the FFA area) to look at activations in rest of lateral VTC without them. Running a pattern analyses on the lateral VTC without the FFA could reveal new findings.		Using the evidence obtained in this analyses, further analyses is needed of the lateral part of VTC to better define location and growth of the FFA. One idea would be to create an ROI with further divisions in the lateral VTC and subtract out the highest activations in the lateral VTC (what we think is the FFA area) to look at activations in rest of the lateral VTC without them. Running a multi voxel pattern analyses on the lateral VTC without the FFA could reveal new findings.
	it appears as though the ROI hypothesis is holding true but we cannot rule out pattern analysis hypothesis quite yet. At some point we want to correlate findings to behavior outside the scanner (increased memory for faces, perceptual discrimination for faces)		It appears as though the ROI hypothesis is holding true but we cannot rule out the pattern analysis hypothesis quite yet. At some point we want to correlate findings to behavior outside the scanner (increased memory for faces, perceptual discrimination for faces)




	= References - Resources and related work =		= References - Resources and related work =

imported>Psych204B: /* Medial VTC correlation graphs */

2010-03-20T04:45:34Z

Medial VTC correlation graphs

← Older revision		Revision as of 04:45, 20 March 2010
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	== Medial VTC correlation graphs ==		== Medial VTC correlation graphs ==
	Medial VTC graphs again show good within category reproducibility better for faces and places than objects. There are no age related differences in age of face stimuli effects. Adult MVPs still show greater differentiation between faces and cars and faces and abstract objects although this differentiation is not as ~~great~~ as in the lateral side of the VTC. Adolescents show less differentiation in the medial side as well for faces vs cars, faces vs abstract objects.		Medial VTC graphs again show good within category reproducibility better for faces and places than objects. There are no age related differences in age of face stimuli effects. Adult MVPs still show greater differentiation between faces and cars and faces and abstract objects although this differentiation is not as significant as in the lateral side of the VTC. Adolescents show less differentiation in the medial side as well for faces vs cars, faces vs abstract objects.

	[[File:Medial vtc graphs.jpg\|thumb\|300px\|center\| Figure 1]]		[[File:Medial vtc graphs.jpg\|thumb\|300px\|center\| Figure 1]]


	= Conclusion =		= Conclusion =

imported>Psych204B: /* Multi Voxel Pattern Analysis vs. ROI analysis */

2010-03-20T04:43:05Z

Multi Voxel Pattern Analysis vs. ROI analysis

← Older revision		Revision as of 04:43, 20 March 2010
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	= Background =		= Background =
	== Multi Voxel Pattern Analysis vs. ROI analysis ==		== Multi Voxel Pattern Analysis vs. ROI analysis ==
	Most of the current research on the VTC and the FFA has focused on region of interest (ROI) analyses. This analysis focuses on the highest activations of the voxels selective for faces. Usually, activations are thresholded so that only voxels responding over a certain level are looked at. Supporters of this type of analysis say that the highest activations are the most interesting and provide the clearest evidence for the age related growth of the FFA (in volume and in more well-defined areas selective for faces vs. non-face stimuli). However, multi voxel pattern analysis (MVPA) supporters insist that there is much more information in all the activations in the VTC, not just the highest ones. They say that the activations are distributed throughout the entire VTC and that the aforementioned growth of the FFA is actually just growth of the entire VTC. This study aims to ~~prove the MVPA supporters wrong by using~~ MVPA to support the initial analyses provided by ROIs.		Most of the current research on the VTC and the FFA has focused on region of interest (ROI) analyses. This analysis focuses on the highest activations of the voxels selective for faces. Usually, activations are thresholded so that only voxels responding over a certain level are looked at. Supporters of this type of analysis say that the highest activations are the most interesting and provide the clearest evidence for the age related growth of the FFA (in volume and in more well-defined areas selective for faces vs. non-face stimuli). However, multi voxel pattern analysis (MVPA) supporters insist that there is much more information in all the activations in the VTC, not just the highest ones. They say that the activations are distributed throughout the entire VTC and that the aforementioned growth of the FFA is actually just growth of the entire VTC. This study aims to use MVPA to support the initial analyses provided by ROIs.
	<br>		<br>


	= Methods =		= Methods =

imported>Psych204B: /* References - Resources and related work */

2010-03-20T04:39:22Z

References - Resources and related work

← Older revision		Revision as of 04:39, 20 March 2010
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	References		References

			Golarai G, Liberman A, Yoon JM and Grill-Spector K (2010) Differential development of the ventral visual cortex extends through adolescence. Front. Hum. Neurosci. 3:80. doi:10.3389/neuro.09.080.2009

imported>Psych204B at 04:34, 20 March 2010

2010-03-20T04:34:47Z

← Older revision		Revision as of 04:34, 20 March 2010
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	Medial VTC graphs again show good within category reproducibility better for faces and places than objects. There are no age related differences in age of face stimuli effects. Adult MVPs still show greater differentiation between faces and cars and faces and abstract objects although this differentiation is not as great as in the lateral side of the VTC. Adolescents show less differentiation in the medial side as well for faces vs cars, faces vs abstract objects.		Medial VTC graphs again show good within category reproducibility better for faces and places than objects. There are no age related differences in age of face stimuli effects. Adult MVPs still show greater differentiation between faces and cars and faces and abstract objects although this differentiation is not as great as in the lateral side of the VTC. Adolescents show less differentiation in the medial side as well for faces vs cars, faces vs abstract objects.

	[[File:		[[File:Medial vtc graphs.jpg\|thumb\|300px\|center\| Figure 1]]

imported>Psych204B at 04:32, 20 March 2010

2010-03-20T04:32:57Z

← Older revision		Revision as of 04:32, 20 March 2010
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	Medial VTC scans show good reproducibility but no above average activation for faces. Highest activation in medial MVPs is for places and absobj> faces. MVPs provide further evidence that FFA is not in the medial side of the VTC.		Medial VTC scans show good reproducibility but no above average activation for faces. Highest activation in medial MVPs is for places and absobj> faces. MVPs provide further evidence that FFA is not in the medial side of the VTC.

	[[File: medial vtc scans.jpg]]		[[File: medial vtc scans.jpg\|thumb\|300px\|center\| Figure 1]]

	== Medial VTC correlation graphs ==		== Medial VTC correlation graphs ==

imported>Psych204B at 04:31, 20 March 2010

2010-03-20T04:31:56Z

← Older revision		Revision as of 04:31, 20 March 2010
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	Medial VTC scans show good reproducibility but no above average activation for faces. Highest activation in medial MVPs is for places and absobj> faces. MVPs provide further evidence that FFA is not in the medial side of the VTC.		Medial VTC scans show good reproducibility but no above average activation for faces. Highest activation in medial MVPs is for places and absobj> faces. MVPs provide further evidence that FFA is not in the medial side of the VTC.

	[[File:		[[File: medial vtc scans.jpg]]

	== Medial VTC correlation graphs ==		== Medial VTC correlation graphs ==