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Permalink Reply by Vimal Kumar V. on June 24, 2012 at 18:36

Jubilee project is related to User studies.

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Permalink Reply by Keerti Purwar on June 24, 2012 at 18:36

Solomon Four Group Design

This design is a combination of the pretest-posttest control group design and the posttest only control group design.  It is as good at controlling threats to internal and external validity as the posttest only control group design, but superior to that design with respect to statistical conclusion validity.  However, it gains that advantage at the cost of considerably greater expense and effort in the collection and analysis of the data.

            To test the hypothesis of no testing by treatment interaction, one could arrange all four groups’ posttest scores into a 2 x 2 factorial ANOVA design, (pretested or not) X (given the experimental treatment or not).  A significant interaction would indicate that the simple main effect of the treatment among those that were pretested was not the same as the simple main effect of the treatment among those that were not pretested.  The main effect of pretesting and the main effect of the treatment could also be assessed with such an ANOVA.  If there existed a significant testing by treatment interaction, one could test the simple main effect of the treatment for the pretested subjects and for the not pretested subjects.  One might also want to analyze the data from the pretest-posttest control group part of the design with those techniques which are appropriate for such a design (such as ANCOV on the posttest scores using pretest scores as a covariate).

            Here are some examples of patterns of results from the Solomon four group design.  Each cell contains a posttest mean.  Where a pretest was given, I have indicated the pretest mean in parentheses.

Treatment effect but no testing or Testing x Treatment interaction

	Treatment
Pre-tested	Control	X		marginal
no	10	30		20
yes	10 (10)	30 (10)		20
marginal	10	30		20

 

Treatment and testing effects but no Testing x Treatment interaction

	Treatment
Pre-tested	none	X		marginal
no	10	30		20
yes	20 (10)	40 (10)		30
marginal	15	35		25

 

Treatment and testing effects and a Testing x Treatment interaction

	Treatment
Pre-tested	none	X		marginal
no	10	30		20
yes	20 (10)	60 (10)		40
marginal	15	45		30

Attachments:

• jubli project.pdf, 188 KB

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Permalink Reply by Ajaz Ahmad on June 24, 2012 at 19:02

Please find the article on JUBILEE PROJECT (JP)it has detailed information on JP.

Thanks.
Regards,
Ajaz

Attachments:

• JUBILEE PROJECT.pdf, 1.7 MB

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Permalink Reply by Suresh Kumar Dubey on June 24, 2012 at 22:45

please see the net question above

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Permalink Reply by Dr. Niraj Barua on June 24, 2012 at 23:44

Solomon Group-Pretest and post test

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