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The following are prohibited by law: Any public performance or display, including transmission of any image over a network; Preparation of any derivative work, including the extraction, in whole or in part, of any images; Any rental, lease, or lending of the program @rY  Introduction  Quasi-experimental design an experimental type design that does not eliminate all threats to internal validity Causal inferences are made by ruling out rival hypothesis By identification and study of the threats By including design elements as pretests or other control groups By coherent pattern matching making a complex prediction that few rival hypotheses can explain .%Nonequivalent Comparison Group Design&& pre-test treatment posttest Exper. 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The following are prohibited by law: Any public performance or display, including transmission of any image over a network; Preparation of any derivative work, including the extraction, in whole or in part, of any images; Any rental, lease, or lending of the program @rY  Introduction  Quasi-experimental design an experimental type design that does not eliminate all threats to internal validity Causal inferences are made by ruling out riv  !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~al hypothesis By identification and study of the threats By including design elements as pretests or other control groups By coherent pattern matching making a complex prediction that few rival hypotheses can explain .%Nonequivalent Comparison Group Design&& pre-test treatment posttest Exper. Gp Y1 X Y2 Control Gp Y1 Y2 This is the most common quasi-experimental design Participants not randomly assigned to groups Threats frequently reveal themselves in the outcome5     >DocumentSummaryInformation8l)"GPossible Outcome Patterns in the Nonequivalent Comparison Group DesignHH6Increasing treatment effect experimental control pretest posttest Can be due to selection-maturation or a selection-history effectZZZZZCZ%  D  Increasing treatment and control groups experimental control pretest posttest Selection-maturation is a threatj(I"( "  Increasing treatment effect Statistical regression is a threat Selection-history is a threat control experimental pretest posttest \A>A7  xCross-over effect Statistical regression not possible experimental control pretest posttestP$C+; >Causal Inference and the Nonequivalent Comparison Group Design??Effect size about the same if nonequivalent comparison group design and randomized design equally well designed and executed The important quasi-experimental design characteristics are Do not let participants self-select into groups Minimize pretest differences in groups*WW  Time Series Design-Conducts an experimental study on one group Interrupted Time-Series design Pre-response Treatment Post-response Y1 Y1 Y1 Y1 X Y 2Y2 Y2 Y2 Threats to internal validity revealed in pattern of pretests Treatment effect revealed by a different pattern of pre and posttest responses ,ZuZZ,M         :Some possible patterns of pre and post treatment responses;; X/ S 0^N0 h`0L(  L L c $g0<$0  RB L s *D RB L s *D  RB L s *D  RB L s *D P P RB L s *D  RB L s *D0 H L 0޽h ? fff{ s ___PPT10S .+EAD ' k= @B D ' = @BA?%,( < +O%,( < +D ' =%(D ' =%(D' =ABBB@B0B%())))?D' =1:Bvisible*o3>+B#style.visibility<*L%(D' =ABBB@B0B%())))?D' =1:Bvisible*o3>+B#style.visibility<*L6%(D' =ABBB@B0B%())))?D' =1:Bvisible*o3>+B#style.visibility<*L7J%(D' =ABBB@B0B%())))?D' =1:Bvisible*o3>+B#style.visibility<*LLZ%(D' =ABBB@B0B%())))?D' =1:Bvisible*o3>+B#style.visibility<*L_y%(+8+0+L0 +ry Uj*"1gdingsTimesShimmer'Chapter 11: Quasi-Experimental Designs Introduction&Nonequivalent Comparison Group DesignHPossible Outcome Patterns in the Nonequivalent Comparison Group DesignSlide 5Slide 6Slide 7?Causal Inference and the Nonequivalent Comparison Group DesignTime Series Design;Some possible patterns of pre and post treatment responses  Fonts UsedDesign Template Slide Titles