Supplement 4. Comparison of 7 items on the disadvantages of data-sharing policies                        
			   
			   Kruskal-Wallis Test

    Number
        72  S12_1
        72  S12_2
        72  S12_3
        72  S12_4
        72  S12_5
        72  S12_6
        72  S12_7
       ----
       504    Total


[Large Samples]

Statistic: x²= 21.21                     After Correction x²= 21.94
Significance (0.05): x²= 12.59                     P Value: P = 0.0012

Decision: The difference between group distribution (medians) is significant.

Dunn's Multiple Comparison

Groups   : 1          2          3          4          5          6          7         
1         
2          1.0000    
3          1.0000     1.0000    
4          1.0000     1.0000     1.0000    
5          1.0000     1.0000     1.0000     1.0000    
6          0.0252*    0.0126*    0.4179     0.2562     0.0462*   
7          1.0000     1.0000     1.0000     1.0000     1.0000     0.0000*   

* Mark: Probability P < 0.05

Item content for the disadvantages of data sharing

* 12. To what extent do you consider data-sharing policies to be a disadvantage or concern in running a journal?
1 Strongly disagree (I am not concerned about this potential disadvantage or concern).	
7 Strongly agree (I am concerned about this potential disadvantage or concern).
1) I'm afraid that publicizing the data will decrease the number of manuscripts submitted.
2) Contributors don't want their data publicly available. 
3) I collect the data but am unsure how to deposit it.
4) I'm concerned about the reliability of the depository or platform once I receive the data.
5) I'm concerned that implementing a data-sharing policy will be costly.
6) The workload of editors or editorial staff will increase after implementing a data-sharing policy.
7) I am unsure if I can contribute to the advancement of the journal by releasing the data.