When false information is repeated several times, people seem to be more likely, on average, to develop false memories than when the information is not repeated. If this conclusion were incorrect, what type of error would the researcher have made?

Reject the null, there is a difference

Explanation:

As per the question, if the given conclusion were incorrect then the error that the researcher has made was rejecting the null hypothesis as it states that there is a difference in characteristics of a mentioned population.

In statistics, the null hypothesis is described as one of the distinct types of hypotheses that is being used in statistics and states that is majorly no difference between the characteristics of a mentioned population or any process that involves data gathering or generating