Marquis is interested in the relationship between drinking coffee and esophageal cancer. He decides to look at surveys for the Lehman College Class of 2019 as a source of data. He tabulates the total cases of esophageal cancer that were reported as well as those members of the class who did not report esophageal cancer. He then calls all of those people and asks them if they can remember drinking coffee in 2010 and, if yes, about how much coffee did they drink daily, among other questions related to potential exposures, i.e. exercise, BMI, stress, etc. Which form of bias is likely to impact the measure of association reported in Marquis’s study?
a. sampling bias
b. recall bias
c. interviewer bias

In simple words, Recall bias can be understood as the systematic mistake that happens when individuals do not properly recall or omit information from past events or situations. The reliability and quantity of recollections can be impacted by future activities and situations.

In the given case, the interview asking the sample something that is not easy to remember. Drinking coffee and how much did they drink is not a valid question as this is too fragile to remember.