*Article* **Information about Human Evolution: An Analysis of News Published in Communication Media in Spanish between 2015 and 2017**

**Jon Ander Garibi, Alvaro Antón and José Domingo Villarroel \***

Faculty of Education Bilbao, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain; jonander.garibi@ehu.eus (J.A.G.); alvaro.anton@ehu.eus (A.A.) **\*** Correspondence: txomin.villarroel@ehu.eus; Tel.: +34-94-601-75-21

**Abstract:** The present study examines a sample of 220 pieces of news related to human evolution, written in Spanish and published over a period of two years, both in digital and print media. The aim of this study is to assess the rigor and coherence of the information in the news in our sample with scientific knowledge on the theory of evolution. To this end, errors and the incorrect use of concepts related to biological evolution are identified, classified according to criteria resulting from the review of previous studies, and finally, the frequency of errors identified in news published in print media is compared with that identified in digital media. The results presented allow us to highlight the significantly high frequency of errors in the news analyzed and the most frequent error categories. Results are discussed within the frame of the important role that scientific journalism plays in the processes of knowledge dissemination, in this case, related to human evolution.

**Keywords:** science education; human evolution; communication media; Spanish media; science communication

#### **1. Introduction**

The evolutionary theory lies at the core of current biological knowledge and allows us to make sense of biological diversity and its change over time [1]. Unsurprisingly, evolution education is worldwide pointed out as one of the crucial ingredients in the biology curriculum [2]. As a consequence, the examination of how people give meaning to evolutionary concepts is attracting increasing interest in the field of education [3,4], as well as in the area of public understanding of science [5,6].

On a separate but not unrelated issue, the influence that communication media has on shaping public opinion toward science-related issues has been widely recognized [7,8], along with the role that it plays as a source of learning [9,10]. This fact has inspired an increasing number of research projects with the objective of examining how mass media covers scientific knowledge on topics such as health [11,12], energy [13,14], technology [15], food and agriculture [16], and climate change [17], to mention just a few relevant examples.

In this context, significant research projects have also emerged to analyze media coverage related to the evolutionary theory, for instance, to examine the accuracy that media affords to evolutionary concepts [18], to study the influence that mass media has on the dissemination of Darwin-skeptic ideas, and to look into the impact that celebrities' claims have on shaping public opinion about evolution [19]. Nonetheless, little attention, if any, has been awarded to the analysis of the journalistic content linked to the issue of human evolution.

In this respect, it should be noted that the notion that the human being is not alien to the evolutionary theory is not a minor matter. On the contrary, it is an essential point of current biological understanding; firstly because it leads us to an in-depth grasp of human's nature, their culture, behavior, and multilevel social organization [20] and secondly because

**Citation:** Garibi, J.A.; Antón, A.; Villarroel, J.D. Information about Human Evolution: An Analysis of News Published in Communication Media in Spanish between 2015 and 2017. *Publications* **2021**, *9*, 28. https:// doi.org/10.3390/publications9030028

Academic Editors: Belén Puebla-Martínez, Jorge Gallardo-Camacho, Carmen Marta-Lazo and Luis Miguel Romero-Rodríguez

Received: 4 May 2021 Accepted: 29 June 2021 Published: 3 July 2021

**Publisher's Note:** MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.

**Copyright:** © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).

current research indicates that a pedagogical emphasis on human examples is an effective procedure to teach essential notions of evolution [21].

In sum, considering together, on the one side, the significance of human evolution for comprehending evolutionary concepts and, on the other side, the crucial role that communication media plays as a driving force for understanding science, it seems certainly relevant to tackle the study of the information appearing in media related to human evolution, particularly due to the lack of previous research.

Accordingly, the present study examines the information that communication media in Spanish disseminated on the particular issue of human evolution over two years (2015–2017). More specifically, the objectives posited for the present research project are as follows:


Ultimately, the present study seeks to provide evidence for the scientific community to assess the rigor of the news disseminated through the communication media regarding human evolution, which is information that might be useful to improve the processes of dissemination of scientific knowledge in our society.

#### **2. Materials and Methods**

#### *2.1. Sample*

A total of 220 pieces of news published in Spanish in different communication media between 1 December 2015 and 1 December 2017 were analyzed. The pieces of news were collected through the digital periodical library MyNews (https://www.mynews.es accessed on 1 December 2017), which offers press material from a wide range of communication media [23], especially within Spain [24]. In a language that presents so many communication media, the sample size became enormous in a relatively short time. A period that allowed the collection of a significant amount of news was delimited following the example of previous studies [11,18].

This platform "MyNews" is a digital search engine that returns a collection of PDF files in which the informative pieces that fit the search criteria are included. It has been previously used in investigations that conducted content analyses [25,26]. The procedure utilized to select the sample was initiated with the search of news by using the following combination of keywords and Boolean operators: evolution AND homo OR human OR man (in Spanish: evolución AND homo OR humano OR hombre). The result of this search yielded 599 pieces of news found in the analysis of 607 printed sources (491 newspapers and 116 magazines) and 795 digital information resources. Afterward, those pieces of news that were unrelated to the topic of human evolution were discarded. Moreover, only the latest release of the news items was included in the sample, when repeated versions of the same information were found. As a consequence, the final sample consisted of 220 pieces of news. Most of the news items came from Spanish media communication (80.9%). The remaining news pieces were from media in four Latin American countries—Argentina, Mexico, Chile, and Colombia.

The complete list of the pieces of news analyzed in the present study is available in the Supplementary Materials.

#### *2.2. Study Variables and Coding Procedure*

Each piece of news in the sample was coded according to the following variables:

(a) Accuracy of the news: nominal variable with two possible values: correct or incorrect. This group includes those pieces of news containing at least one error related to misconceptions associated with scientific knowledge on the theory of evolution;

(b) Number of mistakes per incorrect piece of news: discrete, continuous variable that can have an integer value starting from 1;

(c) Communication medium: nominal variable with two possible values—digital communication media or print media;

(d) Category of conceptual error: qualitative nominal variable referring to the ascription of the errors found in the sample to the categories of improper uses of scientific concepts about human evolution considered in the present study. Table 1 presents a description of each category, together with the most habitual incorrect uses in each category and the references of the studies where these types of conceptual errors are previously cited.

**Table 1.** Description of the categories of conceptual errors used for the analysis of improper uses of scientific concepts related to the theory of evolution. Together with this, the references of the studies used to substantiate the definition of each category are also indicated in the third column.



**Table 1.** *Cont.*

#### *2.3. Analysis Procedure of the Pieces of News*

The pieces of news in the sample were examined according to the variables mentioned above. To this end, the seven categories of conceptual errors presented in Table 1 were first established using a bibliographical revision. The investigations that were followed to develop the set of categories are those cited in the third column of Table 1. Later, two members of the research team (a doctor in Zoology and a teacher with a specialization in science education) jointly classified 20% of the pieces of news in the sample.

Then, both researchers completed the error classification of the remaining pieces of news in the sample independently, and finally, the level of agreement between the resulting classifications was analyzed. It is worth noting that in relation to the cases where various errors belonging to the same category were identified in the same piece of news, these counted as one per category.

#### *2.4. Statistical Procedures*

The study of the level of concordance between the two researchers who assessed the errors detected in the pieces of news that make up the sample was carried out using Cohen's kappa coefficient [45]. Furthermore, the differences between nominal variables were tested using the Chi-square test, estimating the effect size by Cramer's V [46,47]. The level of significance considered in the study is 0.05, and statistical procedures were carried out using a spreadsheet.

#### **3. Results**

The results of the present research project are presented below in two sections. In one section, the analysis of errors detected for the whole sample, with a detail of the frequencies for each of the seven error categories considered in this study is presented. In the other section, the study of the proportion of pieces of news with errors, together with the possible relationship existing between the frequency of pieces of news with errors and the type of communication medium, is shown.

#### *3.1. Review of Errors Found in the Entire Set of News Pieces in the Sample*

A total of 448 incorrect uses of scientific concepts related to the evolution of human beings were found in all 220 pieces of news comprising the sample analyzed. Table 2 presents an overview of illustrative examples found in the pieces of news for each one of all seven error categories, together with the relative frequency of each category, compared to the total errors, and the level of concordance between the two reviewers (Cohen's kappa coefficient).

**Table 2.** Illustrative cases of errors corresponding to each category, along with the relative frequency of cases classified in the error categories (*n* = 448). The last column shows the level of agreement between the two reviewers of the pieces of news (Cohen's kappa).


*3.2. Review of the News Comprised in the Sample*

With regard to the analysis of the proportion of news with concept misuses, 79.1% (*n* = 174) of pieces of news composing our sample presented at least one conceptual error in discussing notions linked to the evolution of human beings. Among these pieces of

news with errors, 51.7% (*n* = 90) had two or three errors, and 24.1% (*n* = 42) presented four errors or more. None of the pieces of news analyzed presented more than six errors.

Besides that, 67.7% of the entire 220 pieces of news were published in digital media and 32.3% in print media (newspapers and magazines). Among the pieces of news published in digital media, 77.2% (*n* = 115) had at least one information error and presented 2.6 errors per piece of news on average. In the case of print media news, at least one error was found in 83.1% of them, and the average was 2.5 errors per piece of news. The differences between digital and print media regarding the presence of incorrect pieces of news were not significant (χ<sup>2</sup> = (4, *n* = 220; *p* < 0.1) = 1.12), and the effect size of the comparison indicated a weak association between variables (V de Cramer = 0.07).

#### **4. Discussion and Conclusions**

The media have an essential educational role [10,67], especially in the field of science, since once formal education is completed, the public acquires new scientific knowledge mainly through the media [68,69]. Therefore, to fight the spread of scientific misinformation, rigorous content must be shared with the public [70]. As a consequence, studying the rigor of communication media in disseminating scientific knowledge is a matter of undeniable social relevance [11,18,71]. In this sense, research studies have been carried out aimed at analyzing the properness of information disseminated by communication media with scientific knowledge [72] in matters such as climate change [17], energy [13,14], and food and agriculture [16]. However, research examining the rigor of journalistic dissemination of scientific knowledge with regard to human evolution happens to be much less frequent, in spite of the influence that the media news may have on this area of knowledge in particular.

In this context, the present research studies information published in 220 pieces of news in digital and print communication media in Spanish, between the end of 2015 and the end of 2017 about biological evolution, with the aim of assessing the level of consistency with scientific knowledge.

The evidence presented is structured around three aspects: error frequency in the pieces of news, the categories of errors found, and the relationship between these and the type of medium.

With regard to the first aspect, almost 8 out of 10 pieces of news analyzed showed at least one error in the information they disseminate on human evolution, and among these, three out of four presented two or more errors. The significant prevalence of errors in the news examined is consistent with the persistence of errors linked to the comprehension of evolutionary processes [27], on the one hand, and, on the other, with the significantly high rate of confusion or inaccuracies that can be found in the information that media spread about scientific and technical matters [73].

With regard to the types of errors observed in the pieces of news analyzed, the most frequent happened to be either those referring to the supposed intentionality or purpose of evolution (finalist category), or those making a mistaken use of biological concepts with the aim of explaining evolutionary changes (category of conceptual errors). This tendency is consistent with the results presented by previous research analyzing the presence of finalist-type understandings related to the evolutionary processes [29] and also with studies examining conceptual errors related to the theory of evolution [28].

Moreover, almost 2 out of 10 errors presented assertions that induce readers to think that human beings are the ultimate end of evolution (category of anthropocentric errors), which is a fact that concurs with previous studies revealing a tendency to give human characteristics and even shape to natural processes during initial stages of comprehension [74].

Mistaken expressions suggesting that evolution is a one-way process toward the development of more perfect species appeared with a similar frequency (errors included in the category linearity). This frequency is similar in previous studies [27,34].

The errors linked to fictitious scenarios as in consonance with scientific evidence on the evolution of humankind (category Science fiction) showed a lower prevalence than the previous categories, but were still relevant, as they implied slightly over 1 out of 10 errors found in the sample. Previous studies also indicate an increasing tendency in the appearance of these types of contents, precisely for their simplicity and for being effectively suggestive [42,75].

With regard to the frequency of errors related to the use of the concept of race, it was certainly lower than the frequency for other categories. However, the qualitative importance that this type of error represents cannot go unmentioned [76,77], nor can the gravity of the errors in some of the evidence found in the sample. Thus, it is relevant to underline the role that communication media should play in avoiding the propagation of conceptual errors, such as using the term "race" to refer to phenotypical variations in the human being that can contribute to the persistence of beliefs with no scientific basis but with important social-type implications.

Finally, regarding the differences found among media, the percentage of correct pieces of news were higher in the case of digital media, compared to print media (22.8% compared to 16.9%), and the frequency of pieces of news with only one mistake was lower in digital platforms (16.8% in digital media, compared to 24% in print media). These differences, however, did not seem to be significant in the sample analyzed, which reinforces the idea that there is uniformity among the contents of both types of media. These observations seem to be in line with the case made in previous studies, in the sense that digital news has its origin in the traditional print press news [78].

To sum up, this set of evidence indicates that the pieces of news analyzed have ample room for improvement regarding the information they communicate about evolutionary processes related to human beings. However, the need to complete the observations in this study with new research that can confirm or disprove the tendencies observed in this research project cannot go unmentioned. To accomplish this task, research studies should be carried out with samples from different contexts, including different language and cultural contexts, a line of research that can help avoid impaired quality in the research disseminated by scientific journalism [79,80]. In addition, this paper omits the analysis of the connection between the journalistic genres and the occurrence of conceptual errors in the news about human evolution, which is an issue that further research should ponder for its examination.

**Supplementary Materials:** The following are available online at https://www.mdpi.com/article/10 .3390/publications9030028/s1.

**Author Contributions:** Conceptualization, J.D.V.; methodology, J.D.V.; software, J.D.V.; validation, J.D.V., A.A., J.A.G., and J.D.V.; investigation, J.D.V., A.A., and J.A.G.; resources, A.A.; data curation, J.D.V., A.A., and J.A.G.; writing—original draft preparation, J.D.V.; writing—review and editing, J.D.V.; visualization, A.A.; supervision, J.D.V.; project administration, J.D.V.; funding acquisition, A.A. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the University of the Basque Country through the project PES20/49.

**Data Availability Statement:** Data are available on request from the authors.

**Conflicts of Interest:** The authors declare no conflict of interest.

#### **References**

