1. Experimental and Quasi-Experimental Research EDUU 600 Notes from McMillan and Schumacher

6. Internal Validity Research Methods Knowledge Base http://www.socialresearchmethods.net/kb/intval.htm

8. External Validity Research Methods Knowledge Base http://www.socialresearchmethods.net/kb/external.htm

9. Proximal Similarity Model for External Validity Research Methods Knowledge Base http://www.socialresearchmethods.net/kb/external.htm

11. Introduction to Design Research Methods Knowledge Base http://www.socialresearchmethods.net/kb/desintro.htm Go to Website

14. Quasi-Experimental Design Pretest-Posttest O 1 X O 2 O 1 O 2 Pre-test Post-test Intervention

15. Quasi-experimental Design Interrupted Time Series O 1 O 2 O 3 O 4 X O 5 O 6 O 7 O 8 Pre-Intervention Post-Intervention Intervention

16. Interrupted Time Series Designs A time series design capitalizes on many observations over time to detect and rule out threats to internal validity. O O O O O O O O O O O X O O O O O O O O O O

17. Control-Group Interrupted Time-Series Group Preobservations Postobservations A O O O O O O O O O X O O O O O O O O B O O O O O O O O O O O O O O O O O

25. Probabilistic Equivalence Research Methods Knowledge Base http://www.socialresearchmethods.net/kb/expequi.htm

26. The t-test Formula Research Knowledge Base - http://www.socialresearchmethods.net/kb/stat_t.htm

28. Example in Excel Using Data Analysis Tool Excel Websites for t-tests Wake Forest - http://www.wfu.edu/~massd2/T_test.htm Dr. Wasson - http://www.mnstate.edu/wasson/ed602excelss11.htm Control Group Test Group 65 85 59 87 60 88 61 92 58 88 59 88 60 85 61 89 62 88 63 85 Mean 60.8 87.5 t-Test: Two-Sample Assuming Equal Variances Variable 1 Variable 2 Mean 60.8 87.5 Variance 4.4 4.722222 Observations 10 10 Pooled Variance 4.561111 Hypothesized Mean Difference 0 df 18 t Stat -27.9551 P(T<=t) one-tail 1.39E-16 t Critical one-tail 1.734064 P(T<=t) two-tail 2.79E-16 t Critical two-tail 2.100922