Table 1.

Correlations between preference function traits and choosiness. The strongest correlations are those between the four preference function traits: peak, tolerance, strength and responsiveness. Correlations calculated separately for closed and open preference functions; significant correlations are shown in italics.

	tolerance	strength	responsiveness	choosiness
closed
peak	−0.44	0.76	−0.77	−0.04
tolerance		−0.76	0.86	−0.17
strength			−0.94	0.01
responsiveness				−0.10
open
peak	0.83	−0.68	−0.76	−0.07
tolerance		−0.70	−0.33	0.05
strength			0.51	0.38
responsiveness				0.28