Figure 2

Concentration-response functions for QHCl in 10 individual D2 mice. Data points for each mouse represent average ratios across two days of testing; these means were fitted with two-parameter logistic functions and the concentration evoking half-maximal avoidance, c, was estimated. For one mouse (D98) this parameter could not accurately estimated, although this mouse had a mean lick ratio of 0.52 for 1 mM QHCl. Italicized mice (D81, D82, D53, D57, D58) were given QHCl as the last of three stimuli, as opposed to the others which received QHCl as the first stimulus.