Lisa Scharrer

Dealing With Uncertainty: Readers' Memory for and Use of Conflicting Information From Science Texts as Function of Presentation Format and Source Expertise

Past research has shown that readers often fail to notice conflicts in text. In our present study we investigated whether accessing information from multiple documents instead of a single document might alleviate this problem by motivating readers to integrate information. We further tested whether this effect would be moderated by source expertise. One hundred undergraduates read the same medical information purportedly written by either medical experts or laypeople, which was presented as one document or spread across four documents. Results revealed partial support for our hypotheses. Readers of multiple documents exhibited superior memory for conflicts and provided a more balanced description of conflicting information in essays they wrote. Variation of author expertise moderated the effect of presentation format in the essay task but not on the memory test. The results extend previous research by showing that multiple documents reading also stimulates the integration of conflicting information.

Voice Modulations in German Ironic Speech.

Previous research has shown that in different languages ironic speech is acoustically modulated compared to literal speech, and these modulations are assumed to aid the listener in the comprehension process by acting as cues that mark utterances as ironic. The present study was conducted to identify paraverbal features of German ‘ironic criticism’ that may possibly act as irony cues by comparing acoustic measures of ironic and literal speech. For this purpose, samples of scripted ironic and literal target utterances produced by 14 female speakers were recorded and acoustically analyzed. Results showed that in contrast to literal remarks, ironic criticism was characterized by a decreased mean fundamental frequency (F0), raised energy levels and increased vowel duration, whereas F0-contours differed only marginally between both speech types. Furthermore, we found ironic speech to be characterized by vowel hyperarticulation, an acoustic feature which has so far not been considered as a possible irony cue. Contrary to our expectations, voice modulations in ironic speech were applied independently from the availability of additional, visual irony cues. The results are discussed in light of previous findings on acoustic features of irony yielded for other languages.

When science becomes too easy: Science popularization inclines laypeople to underrate their dependence on experts

Science popularization fulfills the important task of making scientific knowledge understandable and accessible for the lay public. However, the simplification of information required to achieve this accessibility may lead to the risk of audiences relying overly strongly on their own epistemic capabilities when making judgments about scientific claims. Moreover, they may underestimate how the division of cognitive labor makes them dependent on experts. This article reports an empirical study demonstrating that this “easiness effect of science popularization” occurs when laypeople read authentic popularized science depictions. After reading popularized articles addressed to a lay audience, laypeople agreed more with the knowledge claims they contained and were more confident in their claim judgments than after reading articles addressed to expert audiences. Implications for communicating scientific knowledge to the general public are discussed.