Abstract
Open Access as a publishing model for scholarly communication has become a staple of modern publication, dissemination and discovery of academic research. This article is an attempt to use all available tools to analyse the publishing output of the researchers of the Adam Mickiewicz University in Poznań as regards its full-text availability and the determination of the status of open publications. The methods: The initial stage of the study involved downloading 9,488 DOI identification numbers from the AMU Knowledge Database, which comprised 70.46 per cent of all the articles within the chronological bracket under examination (2017–2020). The second stage involved downloading data from the Web of Science and Scopus data bases, whereas the third stage involved the use of the Unpaywall’s Simple Query tool (https://unpaywall.org/), i.e. the tool that provides data on whether an open version of an article exists based on the article’s DOI , to establish the Open Access Status for the sample under investigation. All data were retrieved on March
25, 2021. The results: 63% of the study samples included open articles, available in full-text in legitimate sources for academic literature. Closed articles included 29.7% of the research output under investigation. The open articles were categorised into the following four types: gold, green, brown and hybrid. In the sample under scrutiny, the most common type of open access model was that of the gold open access
model, while its proportion increased from 51% in 2017 to 61% in 2020. The Adam Mickiewicz University in Poznan emerged as the most popular publisher that produced open articles (more than 22% of articles). The largest number of closed articles has been published by Elsevier (37%). The basic limitation was the impossibility of analyzing all published articles, but only those articles that were provided with their
DOI identification numbers.
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