1: Introduction to Research Designs Last updated Nov 3, 2022 Save as PDF Licensing 1.1: Research Designs Page ID32912 Yang Lydia YangKansas State University ( \newcommand{\kernel}{\mathrm{null}\,}\) 1.1: Research Designs1.2: Internal and External Validity1.3: Threats to Internal Validity and Different Control Techniques1.4: Common Experimental Designs1.5: Common Quasi-Experimental Designs1.6: Non-Experimental Research