Expresiones faciales de la emoción

RESUMEN

En este trabajo Ekman y Oster sintetizan los estudios acerca de las expresiones faciales de la emoción. Comienzan presentando los datos observados y las cuestiones pendientes de los estudios transculturale s y evolutivos, centrándose a continuación en el repaso de las mediciones faciales llevadas a cabo desde diversas perspectivas, en las cuestiones relativas a la exactitud de la información proporcionada por la expresión y en los trabajos sobre retroalimentación facial. La última parte se reserva a la exposición del control neural y correlatos autónomos de la expresión facial, cerrando su síntesis con una visión prometedora de las aportaciones de investigaciones futuras en este campo a otras áreas de la psicología y citando varios hallazgos que muestran cómo el estudio de la expresión facial puede ayudar a entender algunos de los aspectos prácticos de la interacción social.     

远离“城嚣”:自然对人的积极作用、理论及其应用

人类大部分进化时间都是在自然环境中发生的,自然在人的身心健康、认知功能等方面都有积极作用。3个主要的理论揭示了自然对人的积极作用:亲生命性假设认为亲近自然是人类的天性,并且会使人变得更健康和快乐;注意恢复理论认为人处于自然中使用的无意注意能对有意注意疲劳起到恢复作用;压力恢复理论认为接触自然能够激活人类的积极情绪,从而对压力有缓解作用。目前自然对人的积极作用已经在园艺疗法和自然环境疗法得到广泛应用。未来还可以从其他的心理学视角解释自然对人的积极作用,实证研究可以关注真实自然环境和虚拟自然环境的作用差别,还可以考察视觉以外的其他感觉通道接触自然的作用,并结合认知神经科学考察自然积极作用的神经机制。     

Suboptimal choice in a percentage-reinforcement procedure: effects of signal condition and terminal-link length.

Pigeons' choice between reliable (100%) and unreliable (50%) reinforcement was studied using a concurrent-chains procedure. Initial links were fixed-ratio 1 schedules, and terminal links were equal fixed-time schedules. The duration of the terminal links was varied across conditions. The terminal link on the reliable side always ended in food; the terminal link on the unreliable side ended with food 50% of the time and otherwise with blackout. Different stimuli present during the 50% terminal links signaled food or blackout outcomes under signaled conditions but were uncorrelated with outcomes under unsignaled conditions. In signaled conditions, most pigeons displayed a nearly exclusive preference for the 100% alternative when terminal links were short (5 or 10 s), but with terminal links of 30 s or longer, preference for the 100% alternative was sharply reduced (often to below .5). In unsignaled conditions, most pigeons showed extreme preference for the 100% alternative with either short (5 s) or longer (30 s) terminal links. Thus, pigeons' choice between reliable and unreliable reinforcement is influenced by both the signal conditions on the unreliable alternative and the duration of the terminal-link delay. With a long delay and signaled outcomes, many pigeons display a suboptimal tendency to choose the unreliable side.     

Taking the fight out of people: Exploring how defeat modulates the automatic aggressive response to facial anger

Past studies indicate that angry facial expressions automatically activate an aggressive response, seeming to support the view that humans possess an inborn, automatic tendencies to aggress. However, the current authors drew on influential models from evolutionary game theory to suggest that experiences of defeat may modulate this tendency. To examine this, four experiments were conducted to explore how defeat may modulate this aggressive response. In each study, participants executed simulated fight or flight responses based a computerized opponent's facial expression. Across studies, participants were typically faster to initiate fight (than flight) responses against an angry opponent. Simply losing simulated fights (Experiment 1) or experiencing aversive, white noise following simulated losses (Experiment 2) did not eliminate this tendency. However, when aversive noise was specifically experienced after losing to an angry opponent, the automatic aggressive response was eliminated (Experiment 3). This result was directly replicated (Experiment 4). Thus, these studies isolate the cues which automatize submissive behavior and show that fighting experience can modulate even our automatic aggressive responses to others’ anger displays.     

Vulnerability to disease is associated with a domain‐specific preference for symmetrical faces relative to symmetrical non‐face stimuli

Two experiments tested the hypothesis that the accessibility of disease concerns would be associated with a preference for faces high in symmetry, a cue to good health and pathogen resistance. Disease concerns (perceived vulnerability to disease) were measured as an individual difference in Experiment 1 and were situationally primed in Experiment 2. Across both studies, heightened disease sensitivity predicted a preference for symmetrical faces. Importantly, this increased preference for symmetrical faces when disease threats were salient did not generalize to non‐face stimuli. These results suggest a domain‐specific preference for symmetry in human faces, an adaptive response due to the ability of faces to signal resistance to infectious diseases in individuals and situations where disease is a salient threat. Copyright © 2011 John Wiley & Sons, Ltd.     

Self-esteem moderates affective reactions to briefly presented emotional faces

According to the sociometer hypothesis individuals with low self-esteem experience increased negative affect in response to negative social stimuli, even when these stimuli are not perceived consciously. Using an affective priming paradigm, the present study examined whether trait self-esteem would moderate mood following briefly presented facial expressions. Results from 43 undergraduates revealed that, after controlling for baseline mood, anxiety and depression, the degree of negative affect experienced by the participants following exposure to expressions of anger and disgust varied as a function of their self-esteem. Implications for individuals with low-self esteem and our understanding of the link between self-esteem and negative affect are discussed.     

Interfacing the Somatosensory System to Restore Touch and Proprioception: Essential Considerations

ABSTRACT

State-of-the-art upper extremity prostheses include anthropomorphic hands with dexterity that approximates that of a human. To be fully useful, these devices will require an advanced somatosensory neural interface to convey tactile and proprioceptive feedback to the user. To this end, microstimulation methods are being developed using microelectrode arrays implanted at various locations along the somatosensory neuraxis, from peripheral nerves to primary somatosensory cortex. There is presently no consensus as to the best approach, although results from animal and human studies lend support for each. The purpose of this review is to outline practical considerations for the design of a somatosensory interface based on present knowledge of the anatomy and physiology, prior attempts to elicit somatic sensations using electrical stimulation, and lessons learned from successful sensory neuroprostheses such as the cochlear implant.     

Empathy and universal values explicated by the empathy-altruism hypothesis

ABSTRACT

Research reports that empathy is on the decline in present-day society, together with an increasing trend in self-enhancing values. Based on the empathy-altruism hypothesis, we investigated whether these constructs are interlinked by analyzing the relationships between emotional and cognitive empathy and 10 universal values. In the first study, using a middle-aged U.S. sample, the results showed that empathy was strongly and positively related to altruistic values and negatively to self-enhancing values in a pattern that aligned with the empathy-altruism hypothesis. In a second confirmation study, these findings were replicated and extended, while also controlling for the Big Five personality traits, to discount that empathy is only captured by basic personality. Only emotional empathy, not cognitive empathy, accounted for up to 18% additional variance in altruistic values, which further confirmed the emphasis on feelings, as postulated by the empathy-altruism hypothesis.     

Formative evaluation of the transition to postgraduate study for counselling and psychotherapy training: Students' perceptions of assignments and academic writing

Background: Transition to postgraduate study has received little attention and it is often assumed that little adjustment is needed. Focus: This article focuses on the academic writing aspect of the transition to postgraduate study for counselling and psychotherapy students on a British Association for Counselling and Psychotherapy (BACP)‐accredited course. Method: A two‐year formative evaluation was used to elicit students' views on how they experienced the transition to postgraduate study, and to identify what was most and least helpful to students in managing this transition. Results: The findings showed that there was a significant transition, which 63% of students found difficult. Timetabled and integrated, subject specific, academic support is recommended to assist students with their learning needs.