Table 1.
Selected methodological variables by study type
Study | Low-pass filter | Global signal removalbased on | Task regression selection | Seed selection based on | Whole-brain field of view |
GU: Studies supporting general underconnectivity | |||||
Anderson et al. (2010) | Yes | No | Noa | (anat)b | No |
Assaf et al. (2010) | ns | No | Noa | aCOMB | No |
Bird et al. (2006) | No | ns | No | aCOMB | No |
Cherkassky et al. (2006) | No | No | No | aCOMB | No |
Damarla et al. (2010) | ns | ns | No | aCOMB | No |
Jones et al. (2010): M1 | Yes | No | No | aCOMB+aTD | No |
Jones et al. (2010): M2/3 | Yes | No | Yes | aCOMB+aTD | No |
Just et al. (2004) | ns | ns | No | aTD (litTD) | No |
Just et al. (2007) | Yes | ns | No | aCOMB | No |
Kana et al. (2006) | Yes | ns | No | aCOMB | No |
Kana et al. (2007) | Yes | ns | No | aCOMB | No |
Kana et al. (2009) | No | Yes | No | aCOMB | No |
Kennedy and Courchesne (2008) | Yes | Yes | Noa | aTD | No |
Kleinhans et al. (2008) | No | ns | No | aCOMB | Yes |
Koshino et al. (2008) | Yes | ns | No | aCOMB | No |
Lee et al. (2009) | No | No | No | aCOMB | No |
Lombardo et al. (2010) | No | Yes | No | aTD (litTD) | No |
Mason et al. (2008) | No | ns | No | aCOMB | No |
Mostofsky et al. (2009) | No | ns | No | aCOMB | No |
Solomon et al. (2009) | No | ns | No | aTD | No |
Villalobos et al. (2005) | No | ns | Yes | anat | Yes |
Weng et al. (2010) | Yes | ns | Noa | anat (litTD) | No |
NGU: Studies inconsistent with general underconnectivity | |||||
Agam et al. (2010)c | Yes | ns | No | anat+aCOMB | Yes |
Ebisch et al. (2010)c | Yes | Yes | Noa | litTD+aTD | Yes |
Jones et al. (2010): M3 + GSR | Yes | Yes | Yes | aCOMB+aTD | No |
Koshino et al. (2005) | ns | ns | No | anat | No |
Mizuno et al. (2006) | Yes | No | Yes | anat | Yes |
Monk et al. (2009) | Yes | ns | Noa | aTD (litTD) | No |
Noonan et al. (2009) | Yes | No | Yes | aCOMB | Yes |
Shih et al. (2010) | Yes | No | Yes | litTD+anat | Yes |
Turner et al. (2006) | Yes | No | Yes | anat | Yes |
Welchew et al. (2005) | ns | ns | No | anat | Yes |
Wicker et al. (2008) | ns | No | No | litTD+aTD | No |
Note: aCOMB, activation in TD and ASD groups combined; anat, anatomical landmarks. aTD, activation in TD group; litTD, expected activation site based on TD literature; ns, not stated.
Study used resting-state data (see Results for explanation why these were coded as non–task regressed).
Study tested for fcMRI effects for each anatomical brain voxel and its contralateral homolog.
Study graphically reports mixed fcMRI effects (both TD > ASD and ASD > TD).