The effect of observational learning on students' performance, processes, and motivation in two creative domains.

Background: Previous research has shown that observation can be effective for learning in various domains, for example, argumentative writing and mathematics. The question in this paper is whether observational learning can also be beneficial when learning to perform creative tasks in visual and verbal arts.

Aims: We hypothesized that observation has a positive effect on performance, process, and motivation.

Shelf life of prepared Bordet-Gengou and Regan-Lowe agar plates for isolation of Bordetella pertussis.

The shelf life of prepared agar plates used for the isolation of Bordetella pertussis was studied. They contained Bordet-Gengou agar, Bordet-Gengou agar with cephalexin, Regan-Lowe agar, Regan-Lowe agar with cephalexin, or Regan-Lowe agar with both cephalexin and amphotericin B. Plates stored were compared to freshly prepared control plates for up to a maximum of 18 weeks.