Click on the following links. Please note these will open in a new window.

Video Links

• Quantitative Research Designs 
  This YouTube video discusses descriptive non-experimental, quasi-experimental, and experimental research designs and differentiates the three types
• Quasi-Experiments 
  YouTube video of the University of Huddersfield lecturer presenting proper and improper research design including experimental and quasi-experimental designs
• The Gold Standard: What are Randomized Controlled Trials and Why are they Important? 
  This Youtube video from the Medical Research Council Clinical Trials Unit explains what randomized controlled trials and why they are important​

Audio Links

• 9 Threats to Internal Validity 
  This YouTube video of a lecture and powerpoints can also be listened to as just an audio link. The lecturer describes internal validity and nine threats to internal validity
• Research Methods: Qualitative vs. Quantitative Approaches to Gathering Evidence - Part 1 
  This first part of the two part series describes qualitative and quantitative research approaches and myths of both approaches
• Research Methods: Qualitative vs. Quantitative Approaches to Gathering Evidence - Part 2 
  The second part of the two part series how to determine which approach to use when answering research questions

Web Resources

• How to Choose from the Different Research Methods
  This PDF from Georgia Tech provides an overview of the various types of research designs available to conduct research in a table format
• Random Assignment 
  This website gives advantages and disadvantages of random assignment and provides a case example
• Internal and External Validity 
  This multi-page website describes internal and external validity in research