I think they've built a better mousetrap. And I think cheese, the old school bait, the one they use in cartoons, does slightly more efficient work than peanut better.
8 traps set.
4 cheese. 4 peanut butter.
4 old school style. 4 newfangled. Peanut butter and cheese evenly distributed between types.
3 caught mice. 1 old school with cheese. 1 newfangled with cheese. 1 newfangled with peanut butter.
2 had their bait taken without snapping. 1 old school with peanut butter. 1 newfangled with peanut butter.
1 snapped but caught nothing. An old school trap with cheese.
2 went untouched. 1 old school with peanut butter. 1 newfangled with cheese. They were clearly placed on the wrong shelf and will relocate tonight.
I should have graphed or tabled that. But that might have been a little overkill for a mouse catching experiment. Oh well. Maybe next time.