The Wick in the Candle of Learning: Epistemic Curiosity Activates Reward Circuitry and Enhances Memory

ABSTRACT— Curiosity has been described as a desire for learning and knowledge, but its underlying mechanisms are not well understood. We scanned subjects with functional magnetic resonance imaging while they read trivia questions. The level of curiosity when reading questions was correlated with activity in caudate regions previously suggested to be involved in anticipated reward. This finding led to a behavioral study, which showed that subjects spent more scarce resources (either limited tokens or waiting time) to find out answers when they were more curious. The functional imaging also showed that curiosity increased activity in memory areas when subjects guessed incorrectly, which suggests that curiosity may enhance memory for surprising new information. This prediction about memory enhancement was confirmed in a behavioral study: Higher curiosity in an initial session was correlated with better recall of surprising answers 1 to 2 weeks later.     

Social anxiety among East Asians in North America: East Asian socialization or the challenge of acculturation?

North American research has consistently reported higher social anxiety among people of Asian heritage compared to people of Western heritage. The present study used a cross-national sample of 692 university students to explore explanatory hypotheses using planned contrasts of group differences in social anxiety and related variables. The East Asian socialization hypothesis proposed social anxiety would show a linear relation corresponding to the degree of exposure to East Asian cultural norms. This hypothesis was not supported. The cultural discrepancy hypothesis examined whether bicultural East Asian participants (residing in Canada) would endorse higher social anxiety in comparison to unicultural participants (Western-heritage Canadians and native Koreans and Chinese). Compared to unicultural participants, bicultural East Asian participants reported higher social anxiety and depression, a relation that was partially mediated by bicultural participants' reports of lower self-efficacy about initiating social relationships and lower perceived social status. Overall, the results suggest higher reports of social anxiety among bicultural East Asians may be conceptualized within the context of cultural discrepancy with the mainstream culture.     

An Investigation of Entrepreneurs' Venture Persistence Decision: The Contingency Effect of Psychological Ownership and Adversity

We incorporate psychological ownership theory and adversity literature to examine the joint effect of psychological ownership and adversity on entrepreneurs' persistence decision. The results of two experiments and one survey show that both low adversity and high psychological ownership for the venture increase entrepreneurs' likelihood of persistence. We also identify the moderating effect of adversity. Psychological ownership is more relevant to the likelihood of persistence when adversity is high than when it is low. Our research contributes to psychological ownership theory and the entrepreneurial persistence literature and has practical implications for entrepreneurs.     

SCIENCE AND CONFUCIANISM IN RETROSPECT AND PROSPECT

In contrast to Western science and religion, a topic which has been studied very much since the twentieth century, less research has been done on science and Confucianism. By way of a comparative viewpoint within the history of science, this article will deal with some aspects of science and Confucianism in retrospect, for instance, the Confucian origin of the idea of tian yuan di fang 天圓地方, the natural philosophy of qi, and the wu xing li tian zhi qi 五行沴天之氣 bringing abnormal astrological phenomena and reflecting a negative Confucian relation between politics, ethics, and nature. In the late Ming, Xiong Mingyu found that abnormal astrological phenomena, as atmospheric events, happened in the sublunar region rather than in the stars, and in the present time we can reinterpret the crisis of air pollution or global climate change as reflecting a negative Confucian relation between politics, ethics, and nature and as a warning of collective misbehavior in our use of modern scientific technologies.     

On the identification of clinically significant client changes: Reinterpretation of Jacobson's cut scores

Cut points or cut scores play a central role in Jacobson's popular method of identifying clinically significant changes in psychotherapy. When pre- and posttherapy scores of a client are on different sides of one of these cut scores, the change is considered clinically significant, provided that it is also reliable (i.e., not due to measurement errors). This article critically examines the meanings and implications of these cut scores. Contrary to popular beliefs, they are generallynot the test scores for which the probability of belonging to the Functional population is equal to the probability of belonging to the Dysfunctional population. When the Functional population distribution is above that of the Dysfunctional population, persons scoring above these cut scores can, in fact, have much greater probabilities of belonging to the Dysfunctional than to the Functional population. Goals of Jacobson's method can be attained only with Bayesian methods. Bayesian modifications of Jacobson's cut scores are proposed, although their use is limited by the availability of relevant base rates. Bayesian methods (a) can provide information about the probability that an individual belongs to each population, given his (her) score, and (b) are expected to yield total misdiagnosis rates that are many times lower than those of Jacobson's method. Users of Jacobson's method are cautioned against interpreting ratios of likelihoods as if they were ratios of posterior probabilities.     

Effects of word spacing on reading Chinese text from a video display terminal

This study investigated the effects of designing space between words in Chinese text, i.e., whether using a "word" instead of a "character" as a presentation unit, will facilitate the performance of reading from a video display terminal. Experimental results indicated that the main effect of word spacing significantly affected the reading time and the number of questions answered correctly. Subjects spent less time on the text with half-character word spacing or with whole-character word spacing than with conventional type (without word spacing). We also discovered that the number of questions answered correctly for stimuli with half-character spacing is significantly greater than that for stimuli with whole-character spacing, while both are smaller than for stimuli with conventional type. The additional variables, such as text difficulty and display control have significant effects as well. Our results suggested that the optimal word spacing in Chinese text should be greater than that in the traditional layout and less than a whole-character spacing. Apparently, in Chinese text, using a "word" as a presentation unit is more favorable than the traditional layouts that do not have any explicit word boundaries. The word spacing design may benefit in reading difficult or unfamiliar materials and further apply in emergency situations or in reading ambiguous sentences.     

High-resolution characterization of the precipitation behavior of an Al–Zn–Mg–Cu alloy

The metastable particles in an Al–Zn–Mg–Cu alloy have been examined at atomic-resolution using high-angle annular dark field (HAADF) imaging. In under-aged conditions, thin η′ plates were formed with a thickness of seven atomic planes parallel to the {111}_Al planes. The five inner planes of the η′ phase appear to be alternatively enriched in Mg and Zn, with two outer planes forming distinct Zn-rich interfacial planes. Similar Zn-rich interfacial enrichment has also been identified for the η phase, which is a minimum 11-plane thick structure. In rare instances, particles less than seven planes were found indicating a very early preference for seven-layer particle formation. Throughout the aging, the plate thickness appears constant, while the plate radius increases and no particles between 7 and 11 planes were observed. Based on the HAADF contrast, our observations do not support the η′ models previously set forth by other authors. Clear structural similarities between η′ and η were observed, suggesting that drawing distinctions between η′ and η phases may not be necessary or useful.