Answer:
Reliability
Explanation:
On research, reliability refers to the fact of whether or not you get the same answer by using an instrument to measure something more than once.
In other words, it refers to the degree to which one study produces stable and consistent results.
In this example, Kevin conducted a study on whether the length of the line at a specific Starbucks affected how well the customers enjoyed their coffee once they got it.
After this study was done, Malcolm did the same at his local Starbucks and got the same results.
Thus, we can say that Kevin study produced stable and consistent results since they were able to be replicated by Malcolm.
Thus, this study has a high level of reliability.