Table 3.

Averages and standard deviations of the signal parameters which relate to apple pick performance.

	Experimental group (N = 13)		Control group (N = 11)
	Pre	Post	Pre	Post
Signal decline
Slope of a linear fitted line based on trials mean(lowest point)	M: -0.54 SD: 0.25 N: 12	M: -0.74 SD: 0.33 N: 13	M: -0.45 SD: 0.20 N: 9	M: -0.52 SD: 0.13 N: 10
Mean number of scans until apple picked over trials	M: 9.93 SD: 1.98 N: 13	M: 6.54 SD: 2.25 N: 13	M: 8.75 SD: 4.23 N: 11	M: 11.49 SD: 6.48 N: 11
Slope based on the decrease (until below ladder) divided by the number of scans	M: -0.31 SD: 0.16 N: 13	M: -0.50 SD: 0.19 N: 13	M: -0.42 SD: 0.14 N: 11	M: -0.34 SD: 0.16 N: 11
Slope of a linear fitted line based on trials mean (first below ladder).	M: -0.03 SD: 0.03 N: 11	M: -0.22 SD: 0.22 N: 13	M: -0.20 SD: 0.14 N: 9	M: -0.10 SD: 0.10 N: 9
Signal elevation
Mean number of scans until apple picked over trials	M: 11.27 SD: 5.26 N: 11	M: 7.93 SD: 3.78 N: 13	M: 5.81 SD: 2.83 N: 10	M: 6.57 SD: 3.01 N: 9
Slope of a linear fitted line based on trials mean (first above ladder).	M: 0.06 SD: 0.06 N: 10	M: 0.24 SD: 0.17 N: 13	M: 0.31 SD: 0.35 N: 8	M: 0.29 SD: 0.32 N: 8
Undershoot
Average value of undershoots	M: 0.36 SD: 0.19 N: 13	M: 0.37 SD: 0.14 N: 13	M: 0.45 SD: 0.23 N: 11	M: 0.34 SD: 0.14 N: 11
Overshoot
Average value of overshoots	M: 0.35 SD: 0.16 N: 11	M: 0.35 SD: 0.15 N: 13	M: 0.44 SD: 0.14 N: 10	M: 0.33 SD: 0.20 N: 9