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Table 1 The 2-year citation averages for open access versus subscription journals, calculated using Web of Science or Scopus data

From: Open access versus subscription journals: a comparison of scientific impact

Source

Type

Journals (n)

Journal level

Article level

   

Mean

SD

Mean

SD

Journal Citation Reports 2-year citation average

Subscription

7,609

1.97

2.95

2.81

3.31

 

Open access

610

1.50

4.02

2.04

2.28

Scopus 2-year citation average

Subscription

11,124

0.85

1.38

1.59

1.99

 

Open access

1,327

0.61

1.85

1.03

1.44

  1. In the journal level calculations each journal has equal weight; in the article level calculations the impact factors for the journals are weighted by their publication volumes.