When responding to your classmates, provide a scholarly perspective on repeated measures designs and discuss other research designs that could have been used to answer the research question. ( write one paragraph as if you were me)

Independent Variable (IV) (within-subjects-factor) Caffeine dose with 3 levels (each participant completes all three conditions on different days) 1. Omgs (placebo) decaf drink 2. 100 mgs (low dose) about a small cup of coffee 3. 200 mgs (moderate dose) about a strong coffee/energy drink amount The order would be counter balanced across participants to reduce order effects. Dependent Variable (DV) Reaction time measure as the average response time (possibly in milliseconds) on a computerized task, so when a stimulus appears they would press a key. Procedure Each participant would come into the lab three separate times/sessions about a week apart. In each session they would receive one dose level, wait the standard amount (about 30 minutes), then complete the same reaction time task. Why the ANOVA is needed? The reason the ANOVA is needed is that the same participants were used in all three conditions. Which means that the scores are dependent (not independent groups). Another reason is that there are more than two levels of the IV (3 doses) which is means a paired-samples t-test cannot be used due to that only comparing two conditions. A repeated-measures ANOVA test tests whether there is any overall mean differences in the reaction time across the three caffeine levels, while it is also accounting for the fact the measurements are coming from the same people. Which helps reduce error due to the individual differences. Between-subject Design The way the research question "Does caffeine dose affect reaction time in college students?" would be for a between subjects design is that we would assign different participants to different caffeine conditions, rather than everyone experiencing all the conditions. Each participant would complete the reaction time task once after consuming their assigned dose. We would answer that the research questions would be answered by the reaction time scores would be compared between the three IV's to determine whether the average reaction time differs as a function of