Answer: Source misattributions
Explanation: Source misattribution is the confusing situation that occurs in the mind that creates an error. The confusion regarding receiving of information from misinterpreted source of memory occurs.
As the situation mentioned in the question describes about source misattribution .People are not certain about source of memory from where the name Sebastian Weissdorf came from but they gave judgement on it.This depicts that people do not remember the correct source in the experiment.