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Related Experiment Video

Updated: May 23, 2026

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

Published on: March 1, 2022

Enhancing the Jacquez k nearest neighbor test for space-time interaction.

Nicholas Malizia¹, Elizabeth A Mack

¹GeoDa Center for Geospatial Analysis and Computation School of Geographical Sciences and Urban Planning Arizona State University 975 S. Myrtle Ave. Tempe, AZ 85287-5302, USA. nmalizia@asu.edu

Statistics in Medicine

|April 13, 2012

Summary

This study enhances the Jacquez k nearest neighbors test for space-time interaction analysis. The improvements address limitations in scale information, visualization, and population shift bias, creating a more informative metric.

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Last Updated: May 23, 2026

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

Published on: March 1, 2022

Area of Science:

Spatial analysis
Epidemiology
Geographic Information Systems (GIS)

Background:

The Jacquez k nearest neighbors test is a robust method for detecting space-time interaction.
Existing methods have shortcomings, including discarding scale information, lacking visualization, and susceptibility to population shift bias.

Purpose of the Study:

To enhance the Jacquez k nearest neighbors test by addressing its identified shortcomings.
To improve the utility and informativeness of space-time interaction analysis.

Main Methods:

Modifications were made to the Jacquez k nearest neighbors test to incorporate spatial and temporal scale information.
Enhanced visualization techniques were developed for the test results.
The enhanced test was applied to Burkitt's lymphoma case data in Uganda (1961-1975).

Main Results:

The enhancements successfully addressed the limitations of the original Jacquez test.
The modified test provides a complete, descriptive, and informative measure of global space-time interaction.
Visualizations offer clearer insights into the spatial and temporal scales of interaction.

Conclusions:

The enhanced Jacquez k nearest neighbors test is a superior tool for space-time interaction analysis.
The improved test can be used as a stand-alone metric for comprehensive epidemiological studies.
This work advances the field of spatial epidemiology by providing more robust analytical tools.