[R-meta] Effect Sizes From Pretest-Posttest-Control Group Designs and effect sizes from Pretest-Posttest designs

[Yingkai]

Dear Dr. Wolfgang and all,


After reading Morris and DeShon, 2002, I have some new questions.



Morris provided an example of a meta-analysis based on raw-score and
change-score effect sizes (Table 3), however, this is an example of
independent-groups posttest design and single-group pretest–posttest
design. What about independent-groups pretest–posttest design? Can we
transform the effect size of independent-groups pretest–posttest design to
effect size of independent-groups posttest design or to effect size of
single-group pretest–posttest design? If we can, should we use equation 11
or 12 in Morris et al., 2002? The effect size of Independent-groups
pretest–posttest design is d (IG) or d (RM)?



Sorry for the interruption, just feel very confused about this.

Yingkai <yykjiyisuipian using gmail.com> 于2021年12月13日周一 22:37写道：

> Thanks a lot!
>
> Viechtbauer, Wolfgang (SP) <wolfgang.viechtbauer using maastrichtuniversity.nl>于2021年12月13日
> 周一下午10:36写道：
>
>> Dear Yingkai,
>>
>> I don't think there is a single answer here. Of course one can do this --
>> whether one should in any particular case depends on the circumstances. And
>> not sure why combining effect sizes from pretest-posttest-control group
>> designs and effect sizes from between-group designs is out of the question.
>> In any case, a canonical reference here is:
>>
>> Morris, S. B., & DeShon, R. P. (2002). Combining effect size estimates in
>> meta-analysis with repeated measures and independent-groups designs.
>> Psychological Methods, 7(1), 105-125.
>> https://doi.org/10.1037/1082-989x.7.1.105
>>
>> Best,
>> Wolfgang
>>
>> >-----Original Message-----
>> >From: Yingkai [mailto:yykjiyisuipian using gmail.com]
>> >Sent: Monday, 13 December, 2021 15:08
>> >To: r-sig-meta-analysis using r-project.org
>> >Cc: Viechtbauer, Wolfgang (SP)
>> >Subject: Effect Sizes From Pretest-Posttest-Control Group Designs and
>> effect
>> >sizes from Pretest-Posttest designs
>> >
>> >Hi Dr. Wolfgang and all,
>> >    I am wondering whether one can combine effect sizes from
>> pretest-posttest-
>> >control Group designs and effect sizes from pretest-posttest designs(no
>> control
>> >group) in a meta-analysis?
>> >I know that one should not combine effect sizes from
>> pretest-posttest-control
>> >Group designs and effect sizes from between-group designs in a
>> meta-analysis.
>> >
>> >Best,
>> >--
>> >Yingkai, Associate Professor.
>> >Southwest University, ChongQing, CHINA.
>>
> --
> Yingkai, Associate Professor.
> Southwest University, ChongQing, CHINA.
>
> *If you receive this email outside your office hours, please do not feel
> obligated to respond immediately.*
>
>
>

-- 
Yingkai, Associate Professor.
Southwest University, ChongQing, CHINA.

*If you receive this email outside your office hours, please do not feel
obligated to respond immediately.*

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