Deformation twinning-mediated pseudoelasticity in metal–graphene nanolayered membrane

In this study, we investigated the deformation behaviour of metal–graphene nanolayered composites for five face-centred cubic metals under compression using molecular dynamics simulations. It was found that by increasing the thickness of the individual metal layers, the composite strength increased, while the deformation mechanism changed from buckling to deformation twining in Cu, Au and Ag, which was absent in the monolithic form of those metals of the same orientation and size. The deformation twinning was found to be enabled by the graphene layer, which introduced pseudoelasticity and shape memory effects in the nanolayered membrane with more than 15% recoverable compressive strain.     

The study of religion in West Africa 1959–1969

Messianic Judaism is an American-born movement of congregations that hold evangelical beliefs and follow Jewish practices. Scholars have viewed it chiefly as a new religious movement (NRM) or a controversial branch of Judaism. As a result, they have downplayed or ignored its largely evangelical Christian base. The first study of ‘gentile believers,’ this article argues that Messianic Judaism is best understood through the lens of religious seeking, a trend usually associated with alternative spiritualities and still under-theorized vis-à-vis conservative Christians, like evangelicals. First, it traces why Messianic Judaism appeals to growing numbers of North American Christians. Second, and more broadly, it argues that seeking is a spiritually satisfying religious practice that, for evangelicals, reiterates central themes of born-again life. Their experiences also clarify the limits that may constrain religious seeking; they seek to deepen and actualize a biblical worldview in religious sites viewed as proximate to their own.     

A meta-analytic study of the effects of goal setting on task performance: 1966–1984

A meta-analytic study was conducted involving primarily published research from 1966 to 1984 and focusing on the relationship between goal-setting variables and task performance. Two major sets of studies were analyzed, those contrasting hard goals (goal difficulty) versus easy goals, and those comparing specific hard goals (goal specificity/difficulty) versus general goals, “do best” instructions, or no goal. As expected, strong support was obtained for the goal difficulty and goal specificity/difficulty components of E. A. Locke's (1968a, Organizational Behavior and Human Performance, 3, 157–189) theory. A two-stage approach was employed to identify potential moderators of the goal difficulty and goal specificity/difficulty—performance relationships. Setting (laboratory versus field) was identified as a moderator of the relationship between goal specificity/difficulty and task performance. Two supplemental meta-analyses yielded support for the efficacy of combining specific hard goals with feedback versus specific hard goals without feedback and for participatively set goals versus assigned goal setting (when goal level is held constant), although this latter finding was interpreted as inconclusive based on the limited studies available. Implications for future research are addressed.     

Which factors influence number updating in working memory? The effects of size distance and suppression

Updating information in working memory is a critical process which makes possible to have available, at every moment, the information most relevant for mind operations. However, the specific mechanisms underlying the updating process have rarely been analysed. This paper examines the importance of two of the mechanisms implicated in a numerical updating task: item comparison and item substitution. The item comparison mechanism was studied by manipulating the size distance between items. The item substitution mechanism was investigated by increasing/decreasing the number of updates within trials. Furthermore, in order to examine the effects of time constraints, presentation rate was manipulated. Over three experiments, the results obtained highlighted that updating performance is mainly influenced by suppression request, even when the presentation rate is self‐paced. However, errors depend on the distance between items. The implications of the results for the understanding of updating are discussed.     

Incongruence in number–luminance congruency effects

Congruency tasks have provided support for an amodal magnitude system for magnitudes that have a "spatial" character, but conflicting results have been obtained for magnitudes that do not (e.g., luminance). In this study, we extricated the factors that underlie these number-luminance congruency effects and tested alternative explanations: (unsigned) luminance contrast and saliency. When luminance had to be compared under specific task conditions, we revealed, for the first time, a true influence of number on luminance judgments: Darker stimuli were consistently associated with numerically larger stimuli. However, when number had to be compared, luminance contrast, not luminance, influenced number judgments. Apparently, associations exist between number and luminance, as well as luminance contrast, of which the latter is probably stronger. Therefore, similar tasks, comprising exactly the same stimuli, can lead to distinct interference effects.     

Kinetic study of static recrystallization in an Fe–Al–O ultra-fine-grained nanocomposite

A nearly abrupt coarsening of grains is observed in a newly developed Fe–Al–O ultra-fine-grained nanocomposite with a significant volume fraction (4%) of alumina nano-precipitates. The microstructure of the alloy was analysed in different states (as-received and annealed) by means of scanning electron microscopy, transmission electron microscopy (TEM) and hardness. The initial grain size 150–200 nm increases up to 50 μm during annealing 1000 °C/8 h and thereafter demonstrates saturation. A linear correlation between volume fraction of coarse grains and hardness was found. It was identified by TEM that alumina nano-precipitates stabilize the dislocation microstructure against recovery very effectively and the grain coarsening is due to fast growth of very few dislocation free grains. Thus, the observed grain coarsening has the attributes of static recrystallization.     

Energetic effects of dopants on the eutectoid decomposition of Nb–Si in situ composites

The influences of doping elements (Ti, Zr, Hf, V, Ta, Cr, Mo, W and Al) on the heats of formation of Nb, Nb₅Si₃ and Nb₃Si have been studied using first-principles pseudopotential plane-wave method based on density functional theory. Site preferences of dopants in Nb₅Si₃ and Nb₃Si intermetallics are first determined by comparing the heats of formation of the systems with different site occupations of the doping atoms. The partitionings of dopants between the equilibrium phases Nb and Nb₅Si₃ of Nb–Si in situ composites are then discussed and compared with experimental results. Phase partitioning behaviours of the alloying elements are found to depend strongly on the number of their valence electrons. By calculating the enthalpy of reaction regarding the eutectoid decomposition of Nb₃Si phase, we conclude that Ta is a Nb₃Si stabiliser while other dopants destabilise Nb₃Si at the investigated concentration.     

Strategy sequential difficulty effects vary with working-memory and response–stimulus-intervals: A study in arithmetic

Strategy sequential difficulty effects are the findings that when participants execute strategies, performance is worse after a difficult strategy than after an easy strategy (Uittenhove & Lemaire, 2012). Strategy sequential difficulty effects are hypothesized to result from decreased working-memory resources following difficult strategy execution. In the present study we found a correlation between individuals' working memory and strategy sequential difficulty effects in arithmetic, supporting a working-memory account of these effects. Furthermore, we varied response–stimulus intervals, and we found decreased strategy sequential difficulty effects with increasing response–stimulus intervals. Implications of these findings for further understanding of strategic variations in human cognition are discussed.     

Cultural modulations of space–time compatibility effects

The representation of elapsing time may require spatial attention. In certain circumstances, this spatial representation develops from left to right. This is suggested by a performance advantage in responding short with the left hand and long with the right hand (spatial–temporal association between response codes [STEARC]). The present study tests whether one possible determinant of the directionality of the STEARC effect is cultural. In particular, we investigated whether reading/writing habits can affect STEARC direction by administering a visual time judgment task to Italian participants, who were exposed to a left-to-right reading/writing system, and Israeli participants, who mainly used a right-to-left system. The Italian participants showed a left-to-right STEARC effect, while this effect was not present in the Israeli group. The study demonstrates that cultural habits can influence the way in which spatial attention supports the representation of time, similar to the pattern found in other nonspatial domains such as numbers.     

Interference effects of stimulus–response modality pairings in dual tasks and their robustness

Recent evidence suggests that the degree of interference in dual-task situations depends crucially on the pairings of input- and output modalities of the two component tasks with increased dual-task costs for modality incompatible (i.e., visual–vocal and auditory–manual) compared to modality compatible (i.e., visual–manual and auditory–vocal) dual tasks. These effects of modality pairings in dual tasks have been related to the overlap of non-preferred processing pathways in modality incompatible tasks. Until now, modality compatibility has not yet been related to other sources of interference in a dual-task context, such as stimulus–response (S–R) compatibility or crosstalk. In the present study, we conducted two experiments using the paradigm of the psychological refractory period (PRP) to test the effects of S–R compatibility and crosstalk on the effects of modality compatibility in temporally overlapping task situations. Experiment 1 revealed an overadditive interaction between stimulus onset asynchrony and modality compatibility for tasks with S–R compatible mappings, indicating that modality compatibility effects are present in different task situations, even when S–R mappings are otherwise compatible. In Experiment 2, we aimed at pinpointing the boundaries of the effects of modality compatibility in dual-task situations. We showed that additional sources of dual-task interference in a modality compatible dual task could overwrite the pronounced PRP effect previously shown for modality incompatible tasks. Taken together, these data provide new evidence that the specific types of stimulus–response modality pairings are an additional factor that might interact with other sources of interference in dual-task situations.     

A first-principles study of the formation of θ′′ phase in Al–Cu alloys

The θ′′-Al₃Cu phase plays an important role in the precipitation process of Al–Cu alloys. This phase has a sandwich structure—every two {200}_Cu layers are separated by three {200}_Al layers. To analyse the formation mechanism of this structure, the elastic strain energy of the {200}_Cu and {200}_Al layers, and the chemical bonding energy that reflects the interaction between the electrons in Cu and neighbouring Al atoms are calculated and analysed by first-principles calculations, projected density of states and Bader analysis. Our computation results reveal that this sandwich structure is energetically preferred in the competition of elastic strain and chemical bonding energies. To minimise the elastic strain energy of {200}_Al and {200}_Cu layers, the {200}_Cu layers prefer being apart from each other, whereas the chemical bonding energy favours the opposite arrangement because the intermetallic bond between Al and Cu atoms may form through p-d hybridization.     

What is she eating? The effects of meal size on impressions of a female eater

How does what a woman eats affect others' impressions of her? One hundred and thirteen male and female college students, mainly White and middle class, watched a videotape of a female student eating one of four meals that varied in size and gender connotations. Results showed that meal size significantly affected ratings of the woman's social appeal. Thus, eating lightly appears to be socially advantageous for a woman, a phenomenon that may contribute to women's high rates of eating disorders.     

Strategic and cognitive differentiation–integration effort in a study of 76 countries

The phenomena of strategic and cognitive differentiation and integration (SD–IE and CD–IE) amongst life history indicators and cognitive abilities as a function of level of latent life history speed have been robustly demonstrated in individual differences samples. Here we examine a cross-national sample (N = 76 nations) with respect to ten aggregate life history indicators (birth rate, infant mortality, skin reflectance, prevalence of STDs, overall life satisfaction, life expectancy, national IQ, cranial capacity, savings rate and crime rate), all of which share substantive common variance stemming from a K-Super factor which accounts for 66.6% of the variance amongst these indicators. All indicators became significantly less strongly correlated with the super factor as the level of K increased indicating the presence of robust SD–IE effects. A ‘cognitive’ factor comprised of the national IQ and cranial capacity variables also exhibited differentiation as a function of increasing levels of K, suggesting the presence of CD–IE also. Consistently with the findings of individual differences studies investigating SD–IE, the degree to which the indicators loaded on the K super-factor positively mediated their sensitivity to the effect.     

An exploratory study of linguistic–colour associations across languages in multilingual synaesthetes

In one of the most common forms of synaesthesia, linguistic–colour synaesthesia, colour is induced by stimuli such as numbers, letters, days of the week, and months of the year. It is not clear, however, whether linguistic–colour synaesthesia is determined more by higher level semantic information—that is, word meaning—or by lower level grapheme or phoneme structure. To explore this issue, we tested whether colour is consistently induced by grapheme or phoneme form or word meaning in bilingual and trilingual linguistic–colour synaesthetes. We reasoned that if the induced colour was related to word meaning, rather than to the acoustic or visual properties of the words, then the induced colours would remain consistent across languages. We found that colours were not consistently related to word meaning across languages. Instead, induced colours were more related to form properties of the word across languages, particularly visual structure. However, the type of inducing stimulus influenced specific colour associations. For example, colours to months of the year were more consistent across languages than were colours to numbers or days of the week. Furthermore, the effect of inducing stimuli was also associated with the age of acquisition of additional languages. Our findings are discussed with reference to a critical period in language acquisition on synaesthesia.     

Latin America 1520–1600: a page in the history of the study of religion

This article examines the texts written by the first generation of missionaries on the beliefs and mores of the indigenous people of what came to be called Mexico and Peru, supplemented by some accounts written by travelers in Brazil. These works claimed to put forward knowledge about ‘the others’. It is argued that they were important precursors for the study of religion and should receive more attention as such. The issue of location is shown to be always present in this early material, along with the biological notion of hybridization. The conclusion asks whether the contemporary pursuit of knowledge can move from the biological unity of the human race to a view of the race as a social whole with common interests.     

Are large drawings signs of psychological expansion or effects of drawing skills? A critical evaluation of Wartegg drawing size categories in a Finnish sample

Soilevuo Grønnerød, J. & Grønnerød, C. (2010). Are large drawings signs of psychological expansion or effects of drawing skills? A critical evaluation of Wartegg drawing size categories in a Finnish sample. Scandinavian Journal of Psychology, 51, 63–67. In the Wartegg Drawing Completion Test, drawings which are larger than the norm size are interpreted as signs of the personality trait of expansion. The popular handbook by Wass and Mattlar (2000) includes a graphic presentation of the size norms. We scored 351 test blankets into the size categories small, normal and large following these norms. Only 14% of the drawings fitted into the category of normal size, while 13% were small and 73% were large. We also evaluated the test blankets according to drawing ability into five categories and found a high correlation between large size and drawing ability. The results show a need to re‐evaluate the direct link between large size and expansion, as well as a need to modify the size norms.     

Markedness effects in Norwegian–English bilinguals: Task-dependent use of language-specific letters and bigrams

This study investigates how bilinguals use sublexical language membership information to speed up their word recognition process in different task situations. Norwegian–English bilinguals performed a Norwegian–English language decision task, a mixed English lexical decision task, or a mixed Norwegian lexical decision task. The mixed lexical decision experiments included words from the nontarget language that required a “no” response. The language specificity of the Bokmål (a Norwegian written norm) and English (non)words was varied by including language-specific letters (“smør”, “hawk”) or bigrams (“dusj”, “veal”). Bilinguals were found to use both types of sublexical markedness to facilitate their decisions, language-specific letters leading to larger effects than language-specific bigrams. A cross-experimental comparison indicates that the use of sublexical language information was strategically dependent on the task at hand and that decisions were based on language membership information derived directly from sublexical (bigram) stimulus characteristics instead of indirectly via their lexical representations. Available models for bilingual word recognition fail to handle the observed marker effects, because all consider language membership as a lexical property only.     

Dunning–Kruger effects in reasoning: Theoretical implications of the failure to recognize incompetence

The Dunning–Kruger effect refers to the observation that the incompetent are often ill-suited to recognize their incompetence. Here we investigated potential Dunning–Kruger effects in high-level reasoning and, in particular, focused on the relative effectiveness of metacognitive monitoring among particularly biased reasoners. Participants who made the greatest numbers of errors on the cognitive reflection test (CRT) overestimated their performance on this test by a factor of more than 3. Overestimation decreased as CRT performance increased, and those who scored particularly high underestimated their performance. Evidence for this type of systematic miscalibration was also found on a self-report measure of analytic-thinking disposition. Namely, genuinely nonanalytic participants (on the basis of CRT performance) overreported their “need for cognition” (NC), indicating that they were dispositionally analytic when their objective performance indicated otherwise. Furthermore, estimated CRT performance was just as strong a predictor of NC as was actual CRT performance. Our results provide evidence for Dunning–Kruger effects both in estimated performance on the CRT and in self-reported analytic-thinking disposition. These findings indicate that part of the reason why people are biased is that they are either unaware of or indifferent to their own bias.     

Test–retest reliability and task order effects of emotional cognitive tests in healthy subjects

Little is known of the retest reliability of emotional cognitive tasks or the impact of using different tasks employing similar emotional stimuli within a battery. We investigated this in healthy subjects. We found improved overall performance in an emotional attentional blink task (EABT) with repeat testing at one hour and one week compared to baseline, but the impact of an emotional stimulus on performance was unchanged. Similarly, performance on a facial expression recognition task (FERT) was better one week after a baseline test, though the relative effect of specific emotions was unaltered. There was no effect of repeat testing on an emotional word categorising, recall and recognition task. We found no difference in performance in the FERT and EABT irrespective of task order. We concluded that it is possible to use emotional cognitive tasks in longitudinal studies and combine tasks using emotional facial stimuli in a single battery.