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. Author manuscript; available in PMC: 2011 Jun 1.
Published in final edited form as: Stat Interface. 2010;3(1):45–58. doi: 10.4310/sii.2010.v3.n1.a4

Table 2.

Summary of the Bootstrap analysis designed to evaluate a potential bias of Moran’s I (e.g. caused by intrinsic spatial autocorrelation) in PET data.

Mean
Moran’s I 		Working memory load
digit shadowing (DS) low moderate high
Theoretical −0.000101 −0.000101 −0.000101 −0.000101
Bootstrap −0.00033 −0.00025 − 0.00029 −0.00030
Bias −2.29 × 10−4 −1.49 × 10−4 −1.89 × 10−4 −1.99 × 10−4
Variability 0.62 × 10−3 0.62 × 10−3 0.63 × 10−3 0.63 × 10−3