Title Length and Citation Counts for GRL

I read this interesting article by Letchford et al. (2015) on the correlation between paper title length and citation rate. The authors found that for the 20,000 most cited articles each year (from 2007-2013) — not discriminating by discipline — shorter papers are cited more often.

I wondered if this was true within one discipline and within one journal. Fortunately Geophysical Research Letters (GRL) has published some 30,000 articles since its inception in 1974. I downloaded the data for the 20,000 most cited GRL articles in 2015 from Scopus and compared the number of characters in each article’s title to the number of citations the article garnered in 2015:

GRL2015.jpeg

  • Note the typical skewed distribution of citations on the y-axis marginal
  • Note the almost gaussian distribution of article title lengths on the x-axis marginal
  • Thanks to @lukaszpiwek for his work Tufte in R

Ok, so is there a trend? I followed some nice instructions on R tutor to determine if GRL title length (TL) and the number of citations received in 2015 (C) were correlated using Kendall’s tau, a nonparametric correlation metric that was used in Letchford et al., (2015).

> cor(GRL2015, method="kendall", use="pairwise")
Title.length X2015.citation
Title.length 1.0000000000 0.0007179821
X2015.citation 0.0007179821 1.0000000000

Tau, a measure of the correlation that varies form 1 to -1, is very low (0.0007), so I tested to see if the null hypothesis (i.e., title length and citations are uncorrelated) can be rejected:

>cor.test(TL, C, method="kendall")

Kendall's rank correlation tau

data:  TL and C
z = 0.14206, p-value = 0.887
alternative hypothesis: true tau is not equal to 0
sample estimates:
tau
0.0007179821

So we cannot reject the null hypothesis that Title Length and 2015 citation counts are uncorrelated.

There has been other work on this subject, with mixed outcomes. Take a look at the works cited in Letchford et al., (2015) if you are interested…

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s