Exposing information sharing as strategic behavior: power as responsibility and “Trust” buttons

Online platforms' success depends on individual's information sharing (IS). However, previous research showed that “knowledge is power” is a default‐perception in organizations and that individuals share relatively unimportant information while keeping the important private information for themselves. Trust has also been identified as important enabler of IS. We examined the role of power construed as responsibility for others' outcomes and of a “Trust” button, a theory‐inspired technological feature, using a 2(Power construals: opportunity vs. responsibility) × 2(Buttons: “Like” vs. “Like‐or‐Trust”) × 2(Information sharedness as within‐subjects factor; public, private) design. Findings showed that construing power as responsibility and “Trust” button's presence increased the sharing of private information; clicking behavior yielded insights into the underlying mechanisms. Theoretical and practical implications are discussed.     

The absence of numbers to express the amount may affect delay discounting with humans

Human delay discounting is usually studied with experimental protocols that use symbols to express delay and amount. In order to further understand discounting, we evaluated whether the absence of numbers to represent reward amounts affects discount rate in general, and whether the magnitude effect is generalized to nonsymbolic situations in particular. In Experiment 1, human participants were exposed to a delay‐discounting task in which rewards were presented using dots to represent monetary rewards (nonsymbolic); under this condition the magnitude effect did not occur. Nevertheless, the magnitude effect was observed when equivalent reward amounts were presented using numbers (symbolic). Moreover, in estimation tasks, magnitude increments produced underestimation of large amounts. In Experiment 2, participants were exposed only to the nonsymbolic discounting task and were required to estimate reward amounts in each trial. Consistent with Experiment 1, the absence of numbers representing reward amounts produced similar discount rates of small and large rewards. These results suggest that value of nonsymbolic rewards is a nonlinear function of amount and that value attribution depends on perceived difference between the immediate and the delayed nonsymbolic rewards.     

Bayley‐III: Cultural differences and language scale validity in a Danish sample

The purpose of this study was to investigate cultural differences between Danish and American children at 2 and 3 years as measured with the developmental test Bayley‐III, and to investigate the Bayley‐III Language Scale validity. The Danish children (N = 43) were tested with the Bayley‐III and their parents completed an additional language questionnaire (the MacArthur‐Bates CDI). Results showed that scores from the Danish children did not differ significantly from the American norms on the Cognitive or Motor Scale, but the Danish sample scored significantly higher on the Language Scale. A comparison of the Bayley‐III Language subtests with the CDI showed that the two measures correlated significantly, but the percentile score from the CDI was significantly higher than the percentile score from the Bayley‐III Language subtests. This could be because the two instruments measure slightly different areas of language development, or because the Bayley‐III overestimates language development in Danish children. However, due to the limitations of the current study, further research is needed to clarify this issue.     

Similarity effects in visual working memory

Perceptual similarity is an important property of multiple stimuli. Its computation supports a wide range of cognitive functions, including reasoning, categorization, and memory recognition. It is important, therefore, to determine why previous research has found conflicting effects of inter-item similarity on visual working memory. Studies reporting a similarity advantage have used simple stimuli whose similarity varied along a featural continuum. Studies reporting a similarity disadvantage have used complex stimuli from either a single or multiple categories. To elucidate stimulus conditions for similarity effects in visual working memory, we tested memory for complex stimuli (faces) whose similarity varied along a morph continuum. Participants encoded 3 morphs generated from a single face identity in the similar condition, or 3 morphs generated from different face identities in the dissimilar condition. After a brief delay, a test face appeared at one of the encoding locations for participants to make a same/different judgment. Two experiments showed that similarity enhanced memory accuracy without changing the response criterion. These findings support previous computational models that incorporate featural variance as a component of working memory load. They delineate limitations of models that emphasize cortical resources or response decisions.     

The Relationship Between Secondary Traumatic Stress and Personal Posttraumatic Growth: Personality Factors as Moderators

This present study examined the relationship between secondary traumatic stress, personality factors, and personal posttraumatic growth for persons indirectly exposed to traumatic life events. A sample of 162 nurses and physicians completed the self-report measures describing symptoms of secondary traumatic stress, personality factors and vicarious posttraumatic growth. The results indicated that secondary traumatic stress negatively correlated with vicarious posttraumatic growth. Moreover, this relation is moderated by personality factors. A low level of secondary traumatic stress symptoms is associated with a higher level of perceived posttraumatic growth for participants with a high level of openness, agreeability and conscientiousness. These findings emphasize the differences in perceiving posttraumatic growth in the context of secondary exposure to traumatic life events.     

Influence of Child Factors on Health-Care Professionals’ Recognition of Common Childhood Mental-Health Problems

Early recognition of childhood mental-health problems can help minimise long-term negative outcomes. Recognition of mental-health problems, needed for referral and diagnostic evaluation, is largely dependent on health-care professionals’ (HCPs) judgement of symptoms presented by the child. This study aimed to establish whether HCPs recognition of mental-health problems varies as a function of three child-related factors (type of problem, number of symptoms, and demographic characteristics). In an online survey, HCPs (n = 431) evaluated a series of vignettes describing children with symptoms of mental-health problems. Vignettes varied by problem type (Attention-Deficit/Hyperactivity Disorder (ADHD), Generalised Anxiety Disorder (GAD), Autism Spectrum Disorder (ASD), Conduct Disorder (CD) and Major Depressive Disorder), number of symptoms presented (few and many), and child demographic characteristics (ethnicity, gender, age and socio-economic status (SES)). Results show that recognition of mental-health problems varies by problem type, with ADHD best recognised and GAD worst. Furthermore, recognition varies by the number of symptoms presented. Unexpectedly, a child’s gender, ethnicity and family SES did not influence likelihood of problem recognition. These results are the first to reveal differences in HCPs’ recognition of various common childhood mental-health problems. HCPs in practice should be advised about poor recognition of GAD, and superior recognition of ADHD, if recognition of all childhood mental-health problems is to be equal.     

Perceptual expertise improves category detection in natural scenes

There is much debate about how detection, categorization, and within-category identification relate to one another during object recognition. Whether these tasks rely on partially shared perceptual mechanisms may be determined by testing whether training on one of these tasks facilitates performance on another. In the present study we asked whether expertise in discriminating objects improves the detection of these objects in naturalistic scenes. Self-proclaimed car experts (N = 34) performed a car discrimination task to establish their level of expertise, followed by a visual search task where they were asked to detect cars and people in hundreds of photographs of natural scenes. Results revealed that expertise in discriminating cars was strongly correlated with car detection accuracy. This effect was specific to objects of expertise, as there was no influence of car expertise on person detection. These results indicate a close link between object discrimination and object detection performance, which we interpret as reflecting partially shared perceptual mechanisms and neural representations underlying these tasks: the increased sensitivity of the visual system for objects of expertise – as a result of extensive discrimination training – may benefit both the discrimination and the detection of these objects. Alternative interpretations are also discussed.     

Investigating the Perceptions of Intellectual Diversity Among Socially Conservative Christian Seniors at Elite U.S. Colleges

This study investigated the perceptions of intellectual diversity at elite U.S. universities through the lens of the socially conservative Christian senior. Closely aligned with the principle of academic freedom, intellectual diversity is a foundational value putatively espoused by most if not all colleges and universities in the US. Although studies have consistently shown a professorate that is overwhelmingly Democratic and ideologically left-of-center, many scholars deny that any systematic bias exists. Research has shown a correlation between commitment to Christian/conservative values and perception of professor bias. Using hierarchical generalized linear modeling (HGLM) on a subset of the nationally representative sample (N = 2,789) of “very high” institutions, this current study found corroborative evidence that socially conservative Christian students were disproportionately “dissatisfied” or “very dissatisfied” with their institutions’ respect for the expression of diverse beliefs. Generalized findings suggest that systematic bias vis-à-vis the expression of diverse beliefs exists at elite U.S. colleges. The discussion begins by situating intellectual diversity within its historical and contemporary contexts.     

Longitudinal evidence linking processing speed to the development of reasoning

Age‐related change in processing speed has been linked directly to increases in reasoning as well as indirectly via increases in the capacity of working memory (WM). Most of the evidence linking change in speed to reasoning has come from cross‐sectional research; in this article we present the findings from a 2½‐year longitudinal study of 277 6‐ to‐13‐year‐olds. On three occasions, speed of information processing was assessed with Visual Matching and Cross Out; WM was assessed with reading, listening, backward digit, alphabet, and operation span tasks; and nonverbal reasoning was assessed with Raven's progressive matrices. The results provided consistent evidence of direct links from processing speed to reasoning but inconsistent evidence for indirect links from speed to WM to reasoning. These findings suggest that variations in processing speed may constrain the development of reasoning, directly and perhaps indirectly. A video abstract of this article can be viewed at: https://youtu.be/nc0VlFdi468     

Keeping Up with the Joneses: Neighbourhood Wealth and Hypertension

Although individuals are known to be affected by concerns about relative position, little research investigates how neighbors’ wealth affects one’s hypertension risks. This paper investigates the relationship between neighborhood wealth and hypertension using both self-reported hypertension and objective hypertension. I find that self-reported hypertension rate substantially underestimates objectively measured hypertension rate. Consequently, while there is a positive, statistically significant relationship between neighborhood wealth and hypertension when using self-reported hypertension, the results based on measured hypertension data differ substantially, with the relationship only observed for people aged 55–65 but not for younger or older age groups. There is also evidence of a positive relationship between continuous blood pressure and neighborhood wealth for adult people (aged 30 or older).