Final answer:
Possible limitations of the multiyear study on the effectiveness of a new drug for long-term memory loss include participants finding the drug ineffective, participants getting bored and quitting early, and participants having full-time jobs.
Step-by-step explanation:
A possible limitation of this study is that test subjects may find that the drug is not effective. This could potentially skew the results of the study if a significant number of participants report that the drug did not improve their long-term memory. Another limitation could be that test subjects may get bored and want to quit early. This could result in a smaller sample size, which may impact the overall validity of the study. Additionally, the fact that test subjects may have full-time jobs could also affect the study's results, as the drug's effectiveness may vary depending on the individual's lifestyle and responsibilities.
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