The effects and side-effects of statistics education: Psychology students’ (mis-)conceptions of probability

In three studies we looked at two typical misconceptions of probability: the representativeness heuristic, and the equiprobability bias. The literature on statistics education predicts that some typical errors and biases (e.g., the equiprobability bias) increase with education, whereas others decrease. This is in contrast with reasoning theorists’ prediction who propose that education reduces misconceptions in general. They also predict that students with higher cognitive ability and higher need for cognition are less susceptible to biases. In Experiments 1 and 2 we found that the equiprobability bias increased with statistics education, and it was negatively correlated with students’ cognitive abilities. The representativeness heuristic was mostly unaffected by education, and it was also unrelated to cognitive abilities. In Experiment 3 we demonstrated through an instruction manipulation (by asking participants to think logically vs. rely on their intuitions) that the reason for these differences was that these biases originated in different cognitive processes.

Who was Andrea? Writing Oneself as a Feminist Icon

This article explores the construction of Andrea Dworkin as a public persona, or a ‘feminist icon’, revered by some and demonized by others. It argues that in both her fiction and non-fiction, Dworkin engaged in a process of writing herself as an exceptional woman, a ‘feminist militant’ as she describes herself in the subheading of her 2002 memoir, Heartbreak. The article illustrates Dworkin’s autobiographical logic of exceptionalism by comparing the story told in Heartbreak to the story of Dworkin’s major novel, Mercy, which features a heroine, Andrea, who shares Dworkin’s name and significant biographical details. While Dworkin has insisted that Mercy is not an autobiographical novel, the author undertakes a reading here of Mercy as the story of Dworkin if she had not become the feminist icon of her own and others’ construction. In Mercy, Andrea unsuccessfully attempts to escape the silent, victimized status that Dworkin has insistently argued is imposed upon women. In her repeated victimization, Andrea functions for Dworkin as an ‘everywoman’ who both embodies Dworkin’s world-view and highlights how Dworkin’s own biography exists in tension with some of her central assumptions about women, gender and contemporary society.

Water-mediated electrochemical nano-writing on thin ceria films

Bias dependent mechanisms of irreversible cathodic and anodic processes on a pure CeO2 film are studied using modified atomic force microscopy (AFM). For a moderate positive bias applied to the AFM tip an irreversible electrochemical reduction reaction is found, associated with significant local volume expansion. By changing the experimental conditions we are able to deduce the possible role of water in this process. Simultaneous detection of tip height and current allows the onset of conductivity and the electrochemical charge transfer process to be separated, further elucidating the reaction mechanism. The standard anodic/cathodic behavior is recovered in the high bias regime, where a sizable transport current flows between the tip and the film. These studies give insight into the mechanisms of the tip-induced electrochemical reactions as mediated by electronic currents, and into the role of water in these processes, as well as providing a different approach for electrochemical nano-writing.