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TrendPowerTool: A lookup tool for estimating the statistical power of a monitoring program to detect population trends

May 7, 2021

A simulation-based power analysis can be used to estimate the sample sizes needed for a successful monitoring program, but requires technical expertise and sometimes extensive computing resources. We developed a web-based lookup app, called TrendPowerTool (https://www.usgs.gov/apps/TrendPowerTool/), to provide guidance for ecological monitoring programs when resources are not available for a simulation-based power analysis. TrendPowerTool is implemented through the shiny package in R, but is accessible through a webpage without the need for users to install any software. By drawing on results of 1.4 million scenarios that we simulated on a supercomputer, TrendPowerTool quickly and easily provides an estimate of the statistical power to detect a population trend of a particular magnitude with a planned monitoring program, based on user-specified parameters for the monitoring design and population of interest. TrendPowerTool provides a user-friendly interface that retrieves results instantaneously, facilitating the important step of conducting a power analysis when designing monitoring programs.

Citation Information

Publication Year 2021
Title TrendPowerTool: A lookup tool for estimating the statistical power of a monitoring program to detect population trends
DOI 10.1111/csp2.445
Authors Emily L. Weiser, James E. Diffendorfer, Laura Lopez-Hoffman, Darius J. Semmens, Wayne E. Thogmartin
Publication Type Article
Publication Subtype Journal Article
Series Title Conservation Science and Practice
Index ID 70222510
Record Source USGS Publications Warehouse
USGS Organization Upper Midwest Environmental Sciences Center