TY - CONF AU - Dimitri Dounas-Frazer AU - Jacob Stanley AU - Heather Lewandowski BT - 2017 Physics Education Research Conference Proceedings DO - 10.1119/perc.2017.pr.024 PB - American Association of Physics Teachers PY - 2017 T2 - 2017 Physics Education Research Conference Proceedings TI - Instructor perspectives on iteration during upper-division optics lab activities ER -