@proceedings {2279,
	title = {Conceptual change in proportional reasoning: Effects of collaboration, own/partner reasoning level and hypothesis testing},
	year = {2013},
	pages = {1780-1785},
	publisher = {Austin, TX: The Cognitive Science Society},
	author = {Asterhan, C. S. C. and Schwarz, B. B. and Cohen-Eliyahu, N.},
	editor = {M. Knauff and M. Pauen and N. sebanz and I. Wachsmuth}
}
