justin listens to a guest lecturer in his psychology class while he scans the sports news on his laptop. he thinks the speaker's argument makes a lot of sense based on her clear and measured way of speaking. which form of peripheral cue is he using?

He is using expert peripheral cues. That is because the person is a professional and well versed in the field, so Justin is attributing to that person that he is truthful and honest about what he is saying. He is giving credit to him as he respects his position and believes that his expertise is evident from his post.