PPT Slide

ALTERNATIVE QUASI-EXPERIMENTAL DESIGNS

Separate samples pretest-posttest design

R: O1 X

X O2

Nonequivalent control group design

O1 X O2

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O1 O2

Interrupted time series design

O1 O2 O3 O4 X O5 O6 O7 O8

Time series design with nonequivalent control group

O1 O2 O3 O4 X O5 O6 O7 O8

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O1 O2 O3 O4 O5 O6 O7 O8