1. Our Topic:
a. We want to examine the relationship between professors' personality and the frequency in which they use social media sites.
Recall from Practice 14.1 that because personality is a stable trait that cannot be manipulated, the correlational design is most appropriate. We still need to decide how we will operationally define personality and if we will evaluate it on a nominal (grouping) scale or not. Suppose we decide to operationally define personality with a rating scale that assesses extraversion. We also decide to use these ratings to group professors as high or low in extraversion. Answer the following questions:
i. Is it possible for a professor (the participant) to be in more than one of the groups as we defined them (e.g., to be both in the high extraversion group and the low extraversion group)?
ii. If within-groups error is not a major concern, which design might be the best choice for our study?
iii. If within-groups error is a major concern, what else must we consider before choosing a design?
b. We want to conduct an experiment to examine the effect of social media on motivation to learn. We operationalized the IV (social media) using a scenario in which we manipulate a fictional professor's use of social media to communicate with s. In one condition, the professor is described to have a policy against both initiating and accepting "friend requests" froms. In another condition, the professor accepts "friend requests" froms but does not initiate them. In the final condition, the professor both accepts and initiates "friend requests." Using a guide, do you think it would be best to conduct an independent- groups design, a matched-groups design, or a repeated-measures design? Explain your