UGC NET QUESTIONS HELD ON 24 JUNE 2012

[preethasathyan]

1. What is Solomon four group design?

2. Jubilee Project?

 

[Vimal Kumar V.]

Jubilee project is related to User studies.

[Keerti Purwar]

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

[Ajaz Ahmad]

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

Thanks.
Regards,
Ajaz

[Suresh Kumar Dubey]

please see the net question above

[Dr. Niraj Barua]

Solomon Group-Pretest and post test