Table 3.

Per group, the mean ratings and 95% confidence intervals for each individual aspect on the research workflow measured on a 7-point rating scale, as well as the number of respondents answering I do not know or Not applicable on each aspect.

			no. respondents
aspect	experience with preregistration	rating	"I do not know"	"Not applicable"
analysis plan	yes	M = 6.01 [5.88, 6.14]	0	0
	no	M = 4.98 [4.54, 5.42]	1	0
research hypothesis	yes	M = 5.63 [5.49, 5.77]	1	1
	no	M = 5.06 [4.63, 5.49]	2	0
experimental design	yes	M = 5.34 [5.20, 5.48]	1	3
	no	M = 4.76 [4.37, 5.15]	1	1
preparatory work	yes	M = 5.37 [5.23, 5.51]	2	4
	no	M = 4.55 [4.14, 4.96]	1	0
research data management	yes	M = 5.02 [4.89, 5.15]	2	4
	no	M = 4.31 [3.99, 4.63]	1	0
project workflow	yes	M = 4.98 [4.85, 5.11]	5	2
	no	M = 4.31 [3.98, 4.64]	5	0
collaboration in the team	yes	M = 4.57 [4.45, 4.69]	5	4
	no	M = 3.84 [3.57, 4.11]	6	1
work-related stress	yes	M = 3.73 [3.59, 3.87]	5	1
	no	M = 3.14 [2.71, 3.57]	6	0
total project duration	yes	M = 3.07 [2.93, 3.21]	11	1
	no	M = 2.96 [2.60, 3.32]	6	0

Note. Square brackets indicate the 95% confidence interval for the ratings. N = 299 for preregistration group, N = 56 for non-preregistration group.