Quantitative Research Pretest-posttest Nonequivalent Control Group Design Time Series Design Single Subject Design Multiple Baseline Designs Survey Research -Cross-Sectional Design Longitudinal Survey Designs –Trend Study –Cohort Study –Panel Study Quasi-Experimental Designs

Quantitative Quasi-Experimental Designs This family of research designs is characterized by non-random selection of subjects. ******* The following experimental designs are based on the problem statement: The effects of teaching method(s) on history achievement.

Quasi-Experimental Design #1 Pretest-Posttest Non-Equivalent Control Group Design Diagram OOOO OOOO X1XX1X Class #1 Class #2

Quasi-Experimental Design #2 Posttest-Only Non-Equivalent Control Group Design Diagram OOOO X1XX1X Class #1 Class #2

Quasi-Experimental Design #3 Time Series Design Diagram Question Does exposure over a period of time have a lasting effect? (Multiple Groups = Multiple Time Series Designs) Experimental Treatment Pretest Posttest Pretest Posttest

Time Series Design (example) Hypothesis: The use of a History Channel  video as a teaching strategy will result in long-term retention of history knowledge. History Channel  video History Test

Quasi-Experimental: Single Subject A-B Design Baseline Condition - AExperimental Condition - B O1O1 OkOk O k+1 O 2k X1X1 Single Subject methodology makes use of two conditions. The Baseline condition – A – and the Experimental Treatment condition – B and focuses on the behavior of an individual.

Quasi-Experimental: Single Subject/Multiple Baseline A-B-A-B Design Baseline Condition - A Experimental Treatment Condition - B Baseline Condition - A Experimental Treatment Condition - B O1O1 OkOk O k+1 O 2k O 2k+1 O 3k O 3k+1 O 4k X1X1 X1X1 The Multiple Baseline design allows one to study multiple effects & make multiple comparisons over time.