Non-tool-using rooks, <Emphasis Type="Italic">Corvus frugilegus</Emphasis>, solve the trap-tube problem

The trap-tube problem is used to assess whether an individual is able to foresee the outcome of its actions. To solve the task, an animal must use a tool to push a piece of food out of a tube, which has a trap along its length. An animal may learn to avoid the trap through a rule based on associative processes, e.g. using the distance of trap or food as a cue, or by understanding relations between cause and effect. This task has been used to test physical cognition in a number of tool-using species, but never a non-tool-user. We developed an experimental design that enabled us to test non-tool-using rooks, Corvus frugilegus. Our modification of the task removed the cognitive requirements of active tool use but still allowed us to test whether rooks can solve the trap-tube problem, and if so how. Additionally, we developed two new control tasks to determine whether rooks were able to transfer knowledge to similar, but novel problems, thus revealing more about the mechanisms involved in solving the task. We found that three out of seven rooks solved the modified trap-tube problem task, showing that the ability to solve the trap-tube problem is not restricted to tool-using animals. We found no evidence that the birds solved the task using an understanding of its causal properties, given that none of the birds passed the novel transfer tasks.     

Perceiving patterns in dynamic action sequences: Investigating the processes underpinning stimulus recognition and anticipation skill

We examined whether skilled and less‐skilled participants process dynamic sequences comprised of numerous elements using relational information or specific display features. Moreover, the processes underpinning anticipation and recognition judgments were compared. Participants viewed dynamic film sequences showing multiple display features and anticipated what would happen next. New and previously viewed action sequences were then presented in film or point‐light display format. Participants attempted to recognize previously viewed sequences. Skilled participants demonstrated superior anticipation skill and were more sensitive in discriminating previously viewed and novel clips than their less‐skilled counterparts. Skilled participants fixated more locations than less‐skilled participants, implying that they process dynamic scenes as a series of relations between display features. The patterns of eye fixation measures differed between the anticipation and recognition tasks suggesting that different processes underpin these two types of judgments. Copyright © 2009 John Wiley & Sons, Ltd.     

Reduced orthographic learning in dyslexic adult readers: evidence from patterns of letter search

Visual letter search performance was investigated in a group of dyslexic adult readers using a task that required detection of a cued letter target embedded within a random five-letter string. Compared to a group of skilled readers, dyslexic readers were significantly slower at correctly identifying targets located in the first and second string position, illustrating significantly reduced leftward facilitation than is typically observed. Furthermore, compared to skilled readers, dyslexic readers showed reduced sensitivity to positional letter frequency. They failed to exhibit significantly faster response times to correctly detect target letters appearing in the most, compared to least, frequent letter position within five-letter words, and response times correlated with positional letter frequency only for the initial, and not the final, letter position. These results are compatible with the SERIOL (sequential encoding regulated by inputs to oscillations within letter units) model of orthographic processing proposed by Whitney and Cornelissen (2005). Furthermore, they suggest that dyslexic readers are less efficient than skilled readers at learning to extract statistical regularities from orthographic input.     

Emulation and “overemulation” in the social learning of causally opaque versus causally transparent tool use by 23- and 30-month-olds

We explored whether a rising trend to blindly “overcopy” a model’s causally irrelevant actions between 3 and 5 years of age, found in previous studies, predicts a more circumspect disposition in much younger children. Children between 23 and 30 months of age observed a model use a tool to retrieve a reward from either a transparent or opaque puzzle box. Some of the tool actions were irrelevant to reward retrieval, whereas others were causally necessary. The causal relevance of the tool actions was highly visible in the transparent box condition, allowing the participants to potentially discriminate which actions were necessary. In contrast, the causal efficacy of the tool was hidden in the opaque box condition. When both the 23- and 30-month-olds were presented with either the transparent or opaque box, they were most commonly emulative rather than imitative, performing only the causally necessary actions. This strategy contrasts with the blanket imitation of both causally irrelevant and causally relevant actions witnessed at 3 and 5 years of age in our previous studies. The results challenge a current view of 1- and 2-year-olds as largely “blind imitators”; instead, they show that these young children have a variety of social learning processes available to them. More broadly the emerging patterns of results suggest, rather counterintuitively, that the human species becomes more imitative rather than less imitative with age, in some ways “mindlessly” so.     

Support for discriminatory behaviours against immigrants in Italy: Perceived threat and positive beliefs mediate the effect of contact with immigrants

The present study aimed at investigating whether the effects of intergroup contact on support for discriminatory behaviours against immigrants was mediated by perceived threat from immigrants and positive beliefs toward immigrants. Using data from the Italian national survey on “Discrimination by Gender, Sexual Orientation and Ethnic Origin,” which followed a multi-stage stratified cluster sampling procedure, a representative sample of 5509 Italian residents (53.4% women), aged 18 to 74 years, participated. Findings showed that contact with immigrants was negatively related to perceived threat, and positively related to positive beliefs toward immigrants. Mediational analysis conducted by structural equation modelling, indicated that support for discriminatory behaviours was positively associated with perceived threat, and negatively associated with positive beliefs toward immigrants. Both variables together mediated the relationship between contact with immigrants and support for discriminatory behaviours against immigrants; individually, indirect relationships were also significant. To promote interaction between natives and immigrants by reducing the perceived threat and strengthening positive beliefs toward immigrants might lessen support for discriminatory behaviours against immigrants.     

A Meta-Analysis of the Relationship between Curiosity and Creativity

Curiosity, the desire to know, may be associated with creativity, which involves generating ideas that are novel and valuable. This meta-analytic investigation consolidated the results of studies of the association between curiosity and creativity. Across 10 studies, which included 2,692 individuals, there was a significant association between more curiosity and greater creativity (weighted effect size r = .41, 95% CI [.27, .54], p = .0001). For studies examining the association of the exploration dimension of curiosity with creativity, the weighted effect size was r = .48, 95% CI [.09, .74], while for studies examining the deprivation sensitivity dimension of curiosity with creativity the weighted effect size was r = .20, 95% CI [.10, .29]. The association of self-report measures of curiosity with self-reports of creativity was r = .52, 95% CI [.40, .62], while the association of self-report measures of curiosity with rated creativity was r = .16, 95% CI [.10, .22]. These meta-analytic results are congruent with some theoretical assumptions regarding curiosity and creativity and can be a foundation for efforts to facilitate creativity.     

When Seeing should not be Believing: Photographs,Credit Cards and Fraud

Identity cards often include a photograph of the bearer in an attempt to prevent fraudulent use or personation. In the U.K. some credit card companies have recently introduced photo-credit cards and the government is currently considering the introduction of a new driving licence including the bearer's photograph. However, the widely held belief that the inclusion of photographs will reduce or prevent fraudulent use has never been tested. This paper describes a field study designed to examine the utility of photo-credit cards by assessing the accuracy with which supermarket cashiers could identify whether the photographs on credit cards depicted the person tendering them. The results demonstrate that the task of matching the photograph to the shopper is much more difficult than might be expected, and that even under optimized conditions, performance is poor. It is concluded that the introduction of photographs on credit cards would have little effect on the detection of fraud at the point of sale. © 1997 by John Wiley & Sons, Ltd.     

Is Language Required to Represent Others’ Mental States? Evidence From Beliefs and Other Representations

An important part of our Theory of Mind—the ability to reason about other people's unobservable mental states—is the ability to attribute false beliefs to others. We investigated whether processing these false beliefs, as well as similar but nonmental representations, is reliant on language. Participants watched videos in which a protagonist hides a gift and either takes a photo of it or writes a text about its location before a second person inadvertently moves the present to a different location, thereby rendering the belief and either the photo or text false. At the same time, participants performed either a concurrent verbal interference task (rehearsing strings of digits) or a visual interference task (remembering a visual pattern). Results showed that performance on false belief trials did not decline under verbal interference relative to visual interference. We interpret these findings as further support for the view that language does not form an essential part of the process of reasoning online (“in the moment”) about false beliefs.