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First published online October 5, 2007
Journal of Experimental Biology 210, 3689-3695 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.009126
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Cross-modal effects on learning: a seismic stimulus improves color discrimination learning in a jumping spider

Nicole D. VanderSal1,* and Eileen A. Hebets1,2

1 Environmental Science, Policy and Management, University of California Berkeley, Berkeley, CA 94720, USA
2 School of Biological Sciences, University of Nebraska, Lincoln, NE 68588, USA


Figure 1
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  		Fig. 1. Experimental arenas. Black-and-white semicircles represent yellow and red papers placed at the bottom of each arena. The papers were aligned such that one color was completely on the heated side of the aluminum platform and the other color was completely above the non-heated side of the platform. Spiders were dropped into the center of the arena where there was no heat (due to the line of epoxy).

 

Figure 2
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  		Fig. 2. Spectral reflectance profiles of yellow (gray line) and red (black line) papers used as the floor of the arenas. These have distinct reflectance signatures, which are both within the visual range of jumping spiders (Land, 1985Go).

 

Figure 3
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  		Fig. 3. Amount of time spent on heated color in the 10 training trials. Lines and error bars represent the mean and standard error. Letters indicate significant differences: a–b, P<=0.025; a–c, P<=0.005; b–c, not significant.

 

Figure 4
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  		Fig. 4. Number of times individuals went onto the heated color in the 10 training trials. Lines and error bars represent the mean and standard error. Letters indicate significant differences: a–b, P<=0.025.

 

Figure 5
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  		Fig. 5. Proportion of individuals that went onto the previously heated color during the test trial. Asterisks indicate significant difference (P<0.025).

 

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© The Company of Biologists Ltd 2007