Types of spatial randomization

"Randomization" is a broad term, used differently in different contexts. Within ClusterSeer, spatial randomization techniques vary among methods. For the multinomial and Poisson distributions, ClusterSeer generates random values by choosing values from the specified distribution. For conditional randomness, data values are reassigned among sub-groups.

Randomization Technique	Cluster Detection Method
Drawing from a multinomial distribution	Besag and Newell's method Bithell—conditional Kulldorff's Scan Moran's Ipop Turnbull
Drawing from a Poisson distribution	Bithell—unconditional Score
Conditional randomness	Local Moran
Randomize data (rate, count, or case-control label) among spatial locations by swapping labels	Cuzick and Edwards' method Moran's I Getis-Ord Local G method
Alter distances between points by multiplying their locations by a random number	Ripley's K function