guest lecture during interview- what topic to use?

[anonyms]

I have an upcoming interview at a SLAC where I've been asked to teach a guest lecture on a topic of my choice (instead of giving a traditional job talk) in an intro course. I have two options for topics, and I'm having a really hard time figuring out which one to choose, so I'm soliciting your opinions lovely rumor mill-ers.

Background- I specialize in 2 different subfields that have some overlap, but are distinct areas. The job ad was for area A using Method X, and my dissertation topic is on area B using method X (I have other publications in area A).

My options for a talk are:
1) a lecture on the topic of my dissertation in area B- this wouldn't specifically be on my dissertation findings, but on the topic more broadly. The talk I have in mind would also allow me to teach a bit about method X as well, and would include about 5 minutes of talking about area A, but that would not be the focus of the talk.

Advantages: Highlights my dissertation topic, incorporates method x

Disadvantages: the job ad is for area A, this is on area B- and they already have a faculty member specializing in area B (but not in A). I also will have to write a new lecture, as i don't have one put together yet- but given that it's related to my dissertation topic, it won't be a huge pain to do that.

2) A lecture on a topic in area A that I have previously given as a guest lecturer in an intro class. This topic has some more opportunities for student involvement than area B, and touches on method X, but not to the extent that option 1 would

advantages: Shows I can teach stuff other than my dissertation, I already have the lecture prepped and it went over really well the last time I taught it, it's in the area of the job ad.
disadvantages: doesn't address anything I talk about in my dissertation, so doesn't show off my dissertation research at all (although a friend pointed out that I will probably be talking a lot about my dissertation at other points in the interview)


So which to pick?? I have a few weeks to decide, but I really have no idea which way to go. Opinions welcome!

[published and perishing]

#2. Students in an intro class are not likely to care about Method X (whatever it is), so go with your tried and true engaging lecture. Talk up your Method X skills at other times during the interview.

[anonyms]

wanted to clarify one point- the position would also include teaching a class on method x at least once a year, which is why i thought incorporating some teaching of this method (in a way that hangs well with the rest of the lecture of course) might be a good idea.

[uju]

I agree with ^^...go with #2, better incorporate method x into the lecture, and play it up in your interviews.
Clearly this is a teaching-oriented place. I've heard of and have been on interviews where you're expected to give a lecture in addition to the job talk, but never as a replacement. I would do whatever best gets the students engaged. Good luck!