A State-of-Affairs-Semantic Solution to the Problem of Extensionality in Free Logic

Journal of Philosophical Logic - If one takes seriously the idea that a scientific language must be extensional, and accepts Quine’s notion of truth-value-related extensionality, and also...     

Editorial

Ohne Zusammenfassung     

Die Bedeutung von “Figur” und “Grund” für bie unveränderter Schwarzinduktion bestimmte Helligkeitsschwellen

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Antecedents of Business Opportunity Identification and Innovation: Investigating the Interplay of Information Processing and Information Acquisition

Building on conceptual frameworks of entrepreneurial discovery, we argue that active information search compensates for a lack of entrepreneurial experience and enhances the effects of divergent thinking and general mental ability (GMA) on opportunity identification. We sampled 100 business owners in South Africa. Results confirmed the hypothesised moderating effects of active information search on the relationships of entrepreneurial experience and divergent thinking on opportunity identification. Furthermore, we found direct effects of opportunity identification and conditional indirect effects of divergent thinking on innovativeness of product/service innovations. Our findings suggest that a joint examination of entrepreneurial experience and divergent thinking with active information search helps to better understand opportunity identification.     

Analogue Mental Transformations in 3‐Year‐Olds: Introducing a New Mental Rotation Paradigm Suitable for Young Children

Until now, a successful application of the mental rotation paradigm was restricted to children 5 years or older. By contrast, recent findings suggest that even infants can perform mental rotation. Unlike the methods used in infant studies (looking time), our new research paradigm allows for the measurement and interpretation of reaction times. Kindergartners (aged 3–6 years) were presented with a stimulus configuration on a touchscreen and asked to bring a rotated stimulus into an upright position using the shortest path. Mean reaction time (RT) increased linearly with angular disparity. The ensuing linear trend was significant not only for the entire sample but also for the youngest age group analysed separately. To exclude the possibility that linearity was due to movement planning, 3‐year‐olds had to manually rotate a stimulus about the same trajectory without the need for a corresponding mental transformation in a second experiment. Here, no linear trend was observed. These results are interpreted as evidence for an analogue mental transformation in 3‐year‐olds, equal to the transformation processes in older children's and adults' mental rotation. Copyright © 2013 John Wiley & Sons, Ltd.     

Eighteen‐month‐olds’ memory for short movies of simple stories

This study investigated twenty four 18‐month‐olds’ memory for dynamic visual stimuli. During the first visit participants saw one of two brief movies (30 seconds) with a simple storyline displayed in four iterations. After 2 weeks, memory was tested in the visual paired comparison paradigm in which the familiar and the novel movie were contrasted simultaneously and displayed in two iterations for a total of 60 seconds. Eye‐tracking revealed that participants fixated the familiar movie significantly more than the novel movie, thus indicating memory for the familiar movie. Furthermore, time‐dependent analysis of the data revealed that individual differences in the looking‐patterns for the first and second iteration of the movies were related to individual differences in productive vocabulary. We suggest that infants’ vocabulary may be indicative of their ability to understand and remember the storyline of the movies, thereby affecting their subsequent memory.