Table 2.

Mean values of each outcome variable for each keying program for both groups, and the results of GEE tests comparing payment condition, group, and the interaction of the two (Stat = χ², df = 1), unless otherwise noted.

	Group A (n = 23)		Group B (n = 19)		Payment Condition main effect		Group main effect		Payment Condition by Group interaction
	Typing	Keypad	Keypad	Typing	Stat	p value	Stat	p value	Stat	p value
Steps completed (standard score)	0.30 ***	−0.22	0.27 ***	−0.36	31.4	< .001	0.1	n.s.	0.3	n.s.
One-minute timings per hour	28.0 ***	15.0	27.7 ***	14.4	100.5	< .001	0.0	n.s.	0.0	n.s.
Keying accuracy (% characters correct)	90.7	91.7	93.5 ***	80.7	9.2	.002	1.8	n.s.	12.7	< .001
Keying speed (characters per minute)	71.2 *	57.5	57.1	54.0	4.4	.04	1.2	n.s.	1.7	n.s.
Total hours worked	87.4	87.4	93.2	91.9	0.3	n.s.	0.3	n.s.	0.4	n.s.
Obtained pay per hour	$10.26	$10.43	$10.58	$10.64	3.1	n.s.	0.3	n.s.	0.8	n.s.
Average quiz score a	84.6%		82.2%		–		0.4	n.s.	–
Percent choice of keying programs b	73%	27%	90%	10%	–		10.0	.006	–
Percent that selected each keying program in response to questions.
Do you like the way you were paid better on Typing or Keypad? c	91%	9%	89%	11%	–			< .001	–
Which training program did you work harder on? c	95%	5%	89%	11%	–			< .001	–
If you had to choose to work on only one training program all day, which would it be? c	73%	27%	84%	16%	–			< .001	–
Keying program VAS ratings of liking	80.0 *	55.4	82.8 **	63.5	11.3	.001	1.0	n.s.	0.2	n.s.

Note:

Asterisks denote significant effect of planned comparisons between payment conditions within Group A or Group B (* p < .05, ** p < .01, *** p < .001).

VAS = visual analog scale. n.s. = not statistically significant.

^aOne-way ANOVA (Stat = F, df = 1,40).

^bMann Whitney test comparing percentage choice of Typing for each participant as a function of group (Stat = U).

^cFisher’s exact test.