A number of single- and dual-process theories provide competing explanations as to how reasoners evaluate conditional arguments. Some of these theories are typically linked to different instructions—namely deductive and inductive instructions. To assess whether responses under both instructions can be explained by a single process, or if they reflect two modes of conditional reasoning, we re-analysed four experiments that used both deductive and inductive instructions for conditional inference tasks. Our re-analysis provided evidence consistent with a single process. In two new (...) experiments we established a double dissociation of deductive and inductive instructions when validity and plausibility of conditional problems were pitted against each other. This indicates that at least two processes contribute to conditional reasoning. We conclude that single-process theories of conditional reasoning cannot explain the observed results. Theories that postulate at least two processes are needed to account for our findings. (shrink)

Cross-cultural differences in cognition are often related to one single cultural dimension. Whether this suffices even for simple tasks is examined in the context of causal attribution. Culture-specific attribution biases are well-established for the social domain, but under dispute for the physical domain. In order to identify and assess possible impacts on assigning physical causation, we conducted a cross-cultural experiment with participants from Germany, China and Tonga. Participants were required to identify which of two entities is the ultimate cause for (...) a physical interaction that was varied with regard to linguistic cues and content. Our data reveal overall cultural differences in attribution tendencies analogous to those in the social domain, but also an impact of linguistic cues and of the task-specific content. (shrink)