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Scientific results are always afflicted with some uncertainty, especially where emerging technologies are concerned. While there are normative and practical reasons to call for an open admission of scientific uncertainties, concerns about detrimental effects of such communication on public engagement with science have been raised in the literature. The present study was conducted to investigate how the communication of scientific uncertainty in nanotechnology influences laypeople's interest in science and new technologies, beliefs about the nature of science, and trust in scientists. In a longitudinal field experiment, 945 participants were exposed to six real-world media reports (TV features and newspaper articles) on nanotechnology. Contrary to our expectations, the communication of scientific uncertainties was unable to change general beliefs about the nature of science. However, it had no detrimental effect on the trust in scientists, and with respect to interest in science and new technologies, slightly positive effects were observed.

For scientific laypersons, it is becoming increasingly important to understand the concept of scientific evidence. Prior research shows that the media tend to underrepresent the tentativeness and uncertainty of research findings. Yet presently it remains unclear whether beliefs about the certainty or uncertainty of scientific evidence are affected by the mass media’s science coverage. In this study, we tested cultivation effects of features from German science TV shows on laypersons’ beliefs about science and their interest in science. A sample of adults (N = 700) representative of the German population in terms of age, sex, and education participated in a longitudinal field experiment with an extended Solomon four-group design (two experimental and three control groups). The treatment consisted of six successive media stimuli, which portrayed scientific evidence as either certain or uncertain, over the course of 6 weeks. Results indicate media effects on participants’ beliefs about the certainty of scientific evidence. Additionally, the treatment portraying science as certain enhanced participants’ interest in science, whereas the uncertainty treatment had no effect on interest. These experimental findings demonstrate cultivation effects using real-world stimuli and are interpreted in support of the claim for a greater acknowledgement of uncertainty in science communication.

The Perceived Leadership Communication Questionnaire (PLCQ) is a short, reliable, and valid instrument for measuring leadership communication from both perspectives of the leader and the follower. Drawing on a communication-based approach to leadership and following a theoretical framework of interpersonal communication processes in organizations, this article describes the development and validation of a one-dimensional 6-item scale in four studies (total N = 604). Results from Study 1 and 2 provide evidence for the internal consistency and factorial validity of the PLCQ's self-rating version (PLCQ-SR)-a version for measuring how leaders perceive their own communication with their followers. Results from Study 3 and 4 show internal consistency, construct validity, and criterion validity of the PLCQ's other-rating version (PLCQ-OR)-a version for measuring how followers perceive the communication of their leaders. Cronbach's α had an average of.80 over the four studies. All confirmatory factor analyses yielded good to excellent model fit indices. Convergent validity was established by average positive correlations of.69 with subdimensions of transformational leadership and leader-member exchange scales. Furthermore, nonsignificant correlations with socially desirable responding indicated discriminant validity. Last, criterion validity was supported by a moderately positive correlation with job satisfaction (r =.31).