Module Components

• Learning Activities

Topics

• Results Overview
• Statistical Conclusion Validity
• Descriptive Statistics
• Inferential Statistics
• Module 4 Self-Review

NRSG 790-Methods for Research and Evidence-Based Practice

Module 4: Understanding Results

Learning Activities

Understanding the reliability and validity of measures used to collect data is critical to the interpretation of the validity of research findings. Understanding the level of measurement of data is essential to determining the most appropriate statistical procedure to apply to a data set.

1. Take the Module 4 Module 4 Self-Review on Level of Measurement and Reliability and Validity of Measures to test your understanding of these concepts
2. Potential threats to the internal validity of a study are listed in the table below. Complete the table and compare your responses to those provide in the key below

Potential Threat to Internal Validity	Contributory Design Aspects	Design Strategies to Limit
Selection/sample Bias	-No control group -Non-random assignment to intervention & control groups -Observational designs	-Random assignment to intervention & control groups -Analyze differences between groups at baseline -Case/control matching
History
Maturation
Attrition/Mortality
Lack of Intervention Fidelity
Testing
Instrumentation
Contamination/Diffusion of Treatments
Compensatory Rivalry between Treatment Groups
Compensatory Equalization of Treatment by Research Team Member(s)
Statistical Regression

Threats to Internal Validity Key