Table 2.
Task-dependent correlations across ten ROIs.
| ROI-to-ROI | Fisher-transformed correlation coefficient (z) | ||
|---|---|---|---|
| Free view | Search | Memory | |
| V1 – lPITb,d | 0.044 (0.122) | −0.117 (0.161)* | 0.080 (0.134) |
| V1 – lV4a,c | 0.299 (0.153)* | 0.485 (0.166)* | 0.283 (0.200)* |
| V1 – rV4a,c | 0.224 (0.136)* | 0.363 (0.137)* | 0.161 (0.146)* |
| V1 – lSMGb,d | −0.069 (0.149) | −0.247 (0.185)* | −0.051 (0.192) |
| V1 – rSMGb,d | −0.038 (0.108) | −0.116 (0.120)* | −0.000 (0.114) |
| lPIT – lV4b,d | 0.082 (0.120) | −0.043 (0.199) | 0.066 (0.154) |
| lPIT – lSMGa,c | 0.133 (0.144)* | 0.293 (0.143)* | 0.192 (0.139)* |
| lPIT – rSMG | 0.031 (0.111) | 0.125 (0.111)* | 0.038 (0.098) |
| lV4 – rV4c | 0.408 (0.148)* | 0.470 (0.161)* | 0.361 (0.121)* |
| lV4 – rPITb,d | 0.098 (0.120)* | −0.040 (0.156) | 0.113 (0.128)* |
| lV4 – lSMGb,d | −0.033 (0.136) | −0.251 (0.194)* | −0.013 (0.139) |
| lV4 – rSMGb,d | −0.006 (0.138) | −0.140 (0.132)* | 0.029 (0.107) |
| lV4 – lFPb,d | 0.034 (0.114) | −0.128 (0.132)* | 0.004 (0.089) |
| lV4 – rFPb,d | 0.045 (0.093) | −0.069 (0.101) | 0.083 (0.114)* |
| lV4 – rPCGb | 0.117 (0.124)* | −0.013 (0.148) | 0.047 (0.117) |
| rV4 – rPITd,e | 0.038 (0.099) | −0.022 (0.110) | 0.121 (0.111)* |
| rV4 – lSMGb,d | −0.030 (0.102) | −0.163 (0.159)* | −0.013 (0.116) |
| rV4 – rSMGb,d,e | −0.047 (0.109) | −0.132 (0.109)* | 0.053 (0.112) |
| rPIT – lSMGa,c | 0.135 (0.156)* | 0.284 (0.155)* | 0.158 (0.169)* |
| rPIT – rSMGa,c | 0.053 (0.130) | 0.177 (0.120)* | 0.095 (0.118)* |
| lSMG – rSMGa,c | 0.283 (0.173)* | 0.394 (0.204)* | 0.265 (0.166)* |
| lSMG – rFPa,c | 0.122 (0.142)* | 0.231 (0.124)* | 0.103 (0.143)* |
Twenty-two correlations out of 45 possible pairs revealed significant changes across task conditions (p < 0.05/45). Post-hoc tests for each of the 22 ROI-to-ROI correlations were corrected by the same criterion as the strong changes shown in Fig. 3 (p < 0.05/21). The numbers in parentheses are standard deviations of the means. V1 = primary visual cortex; rV4 = right V4; lV4 = left V4; lPIT = left posterior part of the inferior temporal cortex; rPIT = right posterior part of the inferior temporal cortex; lSMG = left supramarginal gyrus; rSMG = right supramarginal gyrus; rPCG = right precentral gyrus; lFP = left frontal pole; rFP = right frontal pole. asignificant post-hoc results of search > free view; bsearch < free view; csearch > memory; dsearch < memory; ememory > free view; *p < 0.001 (two-side one-sample t-test across subjects).