Table I.

Behavioral statistics for the four steps

	Day 1			Day 5
	Mean scans	St.dev scans	Percent errors	Mean scans	St.dev scans	Percent errors
1. Select transformation	2.31	2.31	20.8%	1.47	0.94	10.5%
2. Execute transformation	7.10	5.05	20.6%	4.62	2.85	10.4%
3. Select evaluation	1.24	0.85	3.3%	0.76	0.64	0.8%
4. Execute evaluation	3.68	2.58	6.6%	2.99	2.37	6.6%