CREDIBILITY AND NEWSWORK
Although interest in source credibility is at least as ancient as Greek philosophy (Self, 1996), modern credibility studies only began to appear during the 1940s. The topic soon became one of the most widely studied concepts in communication (Rouner, 2008), with hundreds of published empirical studies (Metzger et al., 2003). Nevertheless, in the specific context of journalism, credibility studies remain scarce (Flynn, 2002; Tsfati, 2008).
Most research outside journalism, beginning with interest in propaganda (Rouner, 2008; Self, 1996), focuses on audiences as addressees of different speakers, writers, messages and media (Metzger et al., 2003; Rouner, 2008; Self, 1996). The applicability of this rich body of research to the specific context of journalism is probably limited.
In the specific context of journalism, credibility is perceived as having a âvisceral nature,â as âan assumption rather than a judgment to be made about a source [ ⊠] not a quality inherent in a source but instead ⊠levied onto a source by the mediaâ (Dunwoody and Ryan, 1987, p. 21). Categorizations of source credibility among journalists are based on cognitive biases (Stocking and Gross, 1989, cited by Self, p. 429) and their criteria are debated by journalists, academics (Tsfati, 2008, p. 2597) and other professionals (Salomone et al., 1990).
Critical approaches assert that â[ ⊠] it is style and presentation rather than truthful information which gives some sources more control over their messages. In this context, journalistic truth is but a by-product of familiarity and legitimacyâ (Altheide, 1978, p. 375).
Source credibility is seen by its critics as a âhigher order resourceâ of organizations and institutions, resulting âin part from other resources such as size, cohesion, knowledge, intensity of feeling and perhaps money or votesâ (Goldenberg, 1975, p. 46).
Three main aspects of source credibility and journalism may be found in the literature: Structural, practical and contextual, each of which will be accompanied by a specific research question.
Structural Aspects
Common wisdom asserts that journalists rely heavily on credible (Manning, 2001) and familiar sources (Gans, 1979; Tuchman, 1978) and that familiarity and credibility are somehow associated (Altheide, 1978; Gans, 1979; Yoon, 2005). This association is consequential, because it may structure the actual mix of sources according to their âhierarchy of credibilityâ (Becker, 1970), resulting in a highly disputed discrimination of ânews accessâ (Cottle, 2000; Goldenberg, 1975; Hall et al., 1978; Manning, 2001) in which âupperâ-class sources receive regular coverage and whose âdistrust must be earnedâ whereas âlowerâ-class sources, constantly deprived of coverage, are considered âillegitimate until proven innocentâ (Altheide, 1978).
Against this backdrop, we may formalize the first research question:
Practical Aspects
In its basic function, source credibility is a major criterion for source selection (Gans, 1979; Goldenberg, 1975; Manning, 2001) in a manner that âavoid[s] engaging in arduous investigations to find evidence for the trustworthiness of a specific sourceâ (Jackob, 2008, p. 1045). According to this perspective, journalists apply source credibility as an efficiency measure: the more credible the source, the less strict the attendant production practices (Fishman, 1980; Gans, 1979). Strictness, in this case, refers to a set of journalistic practices, including cross checking, relying on additional sources (not necessarily for corroboration of previous information) and less anonymity in an attempt to delegate some responsibility to the attributed source (Allan, 1999). A fourth impact is the allocation of less item space for less credible sourcesâan inevitable result of using more sources and applying more cross checking. This association is valuable not only because it was not discovered in previous studies (Flynn, 2002; Yoon, 2005) but primarily because it may help translate an abstract and evasive act of news judgment, carried out on the go, into a measurable output, suggesting a second research question:
As an efficiency measure, source credibility fits the constraints of journalism, in which reporters cannot afford to follow their doubts too far (Fishman, 1980; Gans, 1979; Tuchman, 1978). However, they cannot overextend their efficiency considerations either, as they are employees of brands that have to preserve their own credibility (Roshco, 1975; Schudson, 2003) and whose blunders, flaws, biases, and libels are published promptly and extensively under their own names (Tuchman, 1978; Reich, forthcoming). Hence source work may be perceived as a constant effort to avoid both a prohibitive workload of excessive distrust and reckless trust of unreliable sources.
Contextual Aspects
According to the literature, journalistsâ perception of source credibility is associated with various source traits, such as role (e.g., senior source or public relations practitioner), sector in society (e.g., political or private sector), resources and symbolic assets and even the communication channels through which information is obtained (Gitlin, 1980; Goldenberg, 1975; Reich 2009; Schlesinger, 1990). Apparently, the most trusted sources are public officials, especially senior ones (Fishman, 1980; Machin and Niblock, 2006; Sigal, 1986), followed by not-for-profit and academic sources and medical experts (Becker, 1970; Cottle, 2000; Detjen, 2000; Rouner, 2008; Yoon, 2005). Less credibility is ascribed to business sector sources, PR practitioners, politicians and ordinary citizens (Gans, 1979; Ericson, Baranek and Chan, 1989; Machin and Niblock, 2006).
Although reliance on other persons had become the dominant method for obtaining news (Sigal, 1986; StrömbÀck and Nord, 2005), the most credible sources are probably none other than ⊠journalists themselves when relying on their own eyewitness reports. This practice is not only more immune to bias, but is also perceived as professionally and ethically superior (Christopher, 1998; Russell, 1999; Zelizer, 1990), leading to the third research question:
Methodology
The present study elicits the role played by source credibility in shaping the public news diet using face-to-face reconstruction interviews. This method allows for contact-by-contact testing of the credibility assigned to a given sample of sources by a specific group of reporters who relied on them recently. It enables coverage of a representative sample of news items that were subsequently published or aired, based on detailed testimonies of the reporters who authored them.
The reconstruction interview method proved its ability to identify the contributions of different entities to the published news (Bustos, 2008; Reich 2006, 2009) and was adopted here because of the shortcomings of traditional methods in the conte...