Rachel asks Chandler to proofread her history essay. He goes through it fairly carefully and finds a number of spelling and grammar errors but tells Rachel that her ideas are great. The next semester Chandler takes the same course, and he is surprised when the professor suggests that his essay is "not original work." When Chandler reads Rachel's essay again, he sees that he has included several of Rachel's ideas in his paper. What has Chandler likely experienced in this example?
▸ anterograde interference
▸ a source-monitoring error
▸ reality-monitoring error
▸ proactive interference