a trend towards significanceP =0.07
An independent simple main effect was observed for dose [ANOVA, F 5,146 =3.73, P =0.003] and a trend towards significance was observed in the shock area color [ANOVA, F 1,146 =3.26, P =0.07]; no effect was observed for distance from the lane housing the scented filter paper [ANOVA, F 4,146 =0.958, P =0.43].