A machine learning approach to infant distress calls and maternal behaviour of wild chimpanzees

Animal Cognition - Distress calls are an acoustically variable group of vocalizations ubiquitous in mammals and other animals. Their presumed function is to recruit help, but there has been much...     

Demystification of the Relationship Between Psychopathy and Happiness

Recent findings have provided evidence for a negative correlation between psychopathy and happiness. In order to determine if this correlation is generalizable to all subtypes of psychopathy, participants from the community (N = 572) were recruited to examine happiness-related features among males and females by psychopathic subtypes. Examination of the Fearless-Dominance (PPI-I) and Impulsive-Antisociality (PPI-II) subscales of the Psychopathic Personality Inventory-Short Form provided evidence for two distinct patterns when comparing psychopathic personality traits to happiness-related features. PPI-I was positively correlated with higher durable happiness, presence of a meaning in life, personal growth and hope, and correlated negatively with fluctuating happiness. PPI-II was negatively correlated with durable happiness, presence of a meaning in life, personal growth and hope, and correlated positively with fluctuating happiness and searching for a meaning in life. Despite a few differences, both genders displayed an overall similar pattern between measures of well-being and psychopathic subtypes. Implications for psychopathy regarding the importance of performing analyses by gender and subtypes are discussed.     

Social feedback interferes with implicit rule learning: Evidence from event-related brain potentials

The human brain can learn contingencies built into stimulus sequences unconsciously. The quality of such implicit learning has been connected to stimulus social relevance, but results so far are inconsistent. We engaged participants in an implicit-intentional learning task in which they learned to discriminate between legal and illegal card triads on the sole basis of feedback provided within a staircase procedure. Half of the participants received feedback from pictures of faces with a happy or sad expression (social group) and the other half based on traffic light icons (symbolic group). We hypothesised that feedback from faces would have a greater impact on learning than that from traffic lights. Although performance during learning did not differ between groups, the feedback error-related negativity (fERN) was delayed by ~20 ms for social relative to symbolic feedback, and the P3b modulation elicited by infrequent legal card triads within a stream of illegal ones during the test phase was significantly larger in the symbolic than the social feedback group. Furthermore, the P3b mean amplitude recorded at test negatively correlated with the latency of the fERN recorded during learning. These results counterintuitively suggest that, relative to symbolic feedback, socially salient feedback interferes with implicit learning.     

Toward an Integrative Model of Creativity and Personality: Theoretical Suggestions and Preliminary Empirical Testing

The present work proposes an integrative model of creativity that includes personality traits and cognitive processes. This model hypothesizes that three high‐order personality factors predict two main process factors, which in turn predict intensity and achievement of creative activities. The personality factors are: Plasticity (high openness, extraversion, energy, and inspiration), Divergence (low agreeableness and conscientiousness, high non‐conformity and impulsivity), and Convergence (high ambition, precision, persistence, and critical sense). The process factors are Generation (idea production and originality) and Selection (idea evaluation and formalization). We hypothesized and found that: (a) Plasticity and Divergence predict positively Generation, (b) Convergence predicts positively Selection, (c) Generation, Selection, and their interaction predict positively both intensity and achievement of everyday creative activities.     

The bilingual brain turns a blind eye to negative statements in the second language

Neurobilingualism research has failed to reveal significant language differences in the processing of affective content. However, the evidence to date derives mostly from studies in which affective stimuli are presented out of context, which is unnatural and fails to capture the complexity of everyday sentence-based communication. Here we investigated semantic integration of affectively salient stimuli in sentential context in the first- and second-language (L2) of late fluent Polish–English bilinguals living in the UK. The 19 participants indicated whether Polish and English sentences ending with a semantically and affectively congruent or incongruent adjective of controlled affective valence made sense while undergoing behavioral and electrophysiological recordings. We focused on the N400, a wave of event-related potentials known to index semantic integration. We expected N400 amplitude to index increased processing demands in L2 English comprehension and potential language–valence interactions to reveal differences in affective processing between languages. Contrary to our initial expectation, we found increased N400 for sentences in L1 Polish, possibly driven by greater affective salience of sentences in the native language. Critically, language interacted with affective valence, such that N400 amplitudes were reduced for English sentences ending in a negative fashion as compared to all other conditions. We interpreted this as a sign that bilinguals suppress L2 content embedded in naturalistic L2 sentences when it has negative valence, thus extending the findings of previous research on single words in clinical and linguistic research.     

Psychotherapy training via a task-based assessment of the multicultural orientation framework: A pilot study

This pilot study involved the development and initial testing of an applied Multicultural Orientation Performance Task (MCO-PT) and coding system. The MCO-PT was comprised of seven brief video simulations of cultural exchanges. Seventy-four graduate students recorded responses and then completed measures of desirable responding and multicultural competence. Research assistants coded the videos on three dimensions: cultural humility, cultural opportunities and cultural comfort (ICCs 0.61–0.97). Exploratory factor analysis yielded three factors that corresponded with the MCO constructs (alphas 0.77–0.97). Cultural opportunities were positively correlated with multicultural competence, and none of the subscales were associated with social desirability.     

Basolateral amygdala noradrenergic activity is involved in the acquisition of conditioned odor aversion in the rat

Conditioned odor aversion (COA) is the avoidance of an odorized-tasteless solution (the conditioned stimulus, CS), the ingestion of which precedes toxicosis. Previous works have shown that the basolateral nucleus of the amygdala (BLA) is involved in the acquisition, and more precisely, the control of the CS memory trace, of COA. Since catecholamine depletion of the amygdala induced a deficit in the potentiated version of COA, this study investigated the role of the adrenergic system in the BLA during COA. Male Wistar rats bilaterally implanted with cannulae aimed at the BLA were microinjected with the beta-adrenergic antagonist propranolol (1 microg/0.2 microl) during the acquisition (5 min before the CS presentation, pre-CS, or immediately after, post-CS) or during the retrieval test (5 min before test, pre-test). Results showed that pre-CS, but neither post-CS nor pre-test, infusions of propranolol impaired COA, suggesting that beta-adrenergic system activity in the BLA is involved in the acquisition but not the expression of COA. Moreover, the fact that pre-CS, but not post-CS, treatment disrupted COA suggests that beta-adrenergic system in the BLA is involved in the initiation but not the maintenance of the CS memory trace during COA acquisition.     

Presence as determined by fractal perceptual-motor dynamics.

This paper presents a tentative model of the role of perceptual-motor dynamics in the emergence of the feeling of presence. A new method allowing the measure of how gaze probes three-dimensional space in immersion is used to support this model. Fractal computations of gaze behavior are shown to be more effective than standard computations of eye movements in predicting presence.     

Decision making and visibility in cats (Felis catus) in a progressive elimination task

When making decisions animals can rely on information stored in memory and/or on information available through perceptual processes. Under some circumstances, perceptual access to a relevant piece of information can be lost as when a prey hides under a cover. If this piece of information is critical, the animal must be able to keep it active in the working memory until the final decision is made. Species endowed with object permanence can to a certain extent overcome such a lack of perceptual access. Numerous studies have investigated object permanence in animals, but no study systematically examined the interaction when making a decision between an information directly available through perception and an information that can no longer be perceived. In the present study, domestic cats (Felis catus) were administered a progressive elimination task in which they had to visit and deplete either two visible and one hidden target (e.g., Experiments 1 and 2) or one visible and two hidden targets (e.g., Experiments 3 and 4). The cats were brought back to the starting point after each visit to any target whether that target had been previously visited or not. The results revealed that the cats searched at the visible target(s) first and at the hidden target(s) last, which was referred to as the visibility rule. The results also revealed that the position of the bowl that was distinct (e.g., the visible bowl when the two other ones were hidden and the opposite) influenced the way this cognitive rule was implemented. More specifically, when the intermediate bowl was distinct the visibility rule was readily implemented but when either the right of the left bowl was distinct the visibility was violated. That is the cats did no longer choose the visible target(s) first. The visibility rule was interpreted in terms of optimization principles, the external distinct target effect was interpreted in terms of divided attention and lateralization.