Identify the differences between the random groups design and the repeated measures design in terms of how the independent variable is manipulated and what potential confounding variable must be balanced in each design.What method(s)are available for balancing in each design?

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The Answer is In a random groups design the researcher manipulates the independent variable such that different groups of participants experience each level of the independent variable.Individual differences among participants across the conditions of the experiment must be balanced; random assignment to conditions is the preferred method for balancing individual differences variables.In the repeated measures design the independent variable is manipulated such that the same group of participants experiences every condition of the experiment.Practice effects due to repeated measurement must be counterbalanced in repeated measures designs.In the complete repeated measures design,in which each participants experiences every condition more than once,ABBA counterbalancing or block randomization may be used to balance practice effects across conditions.In the incomplete design,in which each participant experiences every condition exactly once,all possible orders or selected orders may be used to balance practice effects.

Identify the Differences Between the Random Groups Design and the Repeated