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Hydronium and hydroxide ions are present both in pure water and in all aqueous solutions, and their concentrations are inversely proportional as determined by the ion product of water (Kw). The concentrations of these ions in a solution are often critical determinants of the solution’s properties and the chemical behaviors of its other solutes. Two different solutions can differ in their hydronium or hydroxide ion concentrations by a million, billion, or even trillion times. A common means of...

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Ecotoxicological Methodologies to Evaluate Biomarkers at Different Scales in Neotropical Anurans

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Challenges, Opportunities, and Methods for Large-Scale Evaluations.

James H Derzon¹

¹1 RTI International, Social, Statistical, and Environmental Sciences, Center for Advanced Research Methods, Washington, DC, USA.

Evaluation & the Health Professions

|March 27, 2018

Summary

Large-scale evaluation methods are now accessible for local and regional projects, offering insights into program effectiveness across diverse settings. This approach helps decision-makers choose and implement evidence-based programs effectively.

Keywords:

evaluation practice implementation science large-scale evaluation multisite evaluation utilization-focused evaluation

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Area of Science:

Program Evaluation
Health Services Research

Background:

Large-scale evaluation was historically confined to federal initiatives.
Regularly collected performance measures and multisite quality improvement efforts enable broader application.

Purpose of the Study:

To present methods for constructing and executing large-scale evaluations.
To provide decision-makers with evidence for informed program adoption.

Main Methods:

Focus on variation in program effects across different settings and implementation conditions.
Analyzing factors contributing to program success or failure in diverse contexts.

Main Results:

Effective programs exhibit varied outcomes across different implementation sites.
Understanding contextual factors is key to explaining differential program effects.

Conclusions:

Large-scale evaluation is crucial for understanding program variability and informing evidence-based adoption.
This methodology supports decision-makers in selecting appropriate and effective programs for their specific needs.