Human ostensive signals do not enhance gaze following in chimpanzees,but do enhance object-oriented attention

The previous studies have shown that human infants and domestic dogs follow the gaze of a human agent only when the agent has addressed them ostensively—e.g., by making eye contact, or calling their name. This evidence is interpreted as showing that they expect ostensive signals to precede referential information. The present study tested chimpanzees, one of the closest relatives to humans, in a series of eye-tracking experiments using an experimental design adapted from these previous studies. In the ostension conditions, a human actor made eye contact, called the participant’s name, and then looked at one of two objects. In the control conditions, a salient cue, which differed in each experiment (a colorful object, the actor’s nodding, or an eating action), attracted participants’ attention to the actor’s face, and then the actor looked at the object. Overall, chimpanzees followed the actor’s gaze to the cued object in both ostension and control conditions, and the ostensive signals did not enhance gaze following more than the control attention-getters. However, the ostensive signals enhanced subsequent attention to both target and distractor objects (but not to the actor’s face) more strongly than the control attention-getters—especially in the chimpanzees who had a close relationship with human caregivers. We interpret this as showing that chimpanzees have a simple form of communicative expectations on the basis of ostensive signals, but unlike human infants and dogs, they do not subsequently use the experimenter’s gaze to infer the intended referent. These results may reflect a limitation of non-domesticated species for interpreting humans’ ostensive signals in inter-species communication.     

Frontal pole cortex: encoding ends at the end of the endbrain

Considerable neuroimaging research in humans indicates that the frontal pole cortex (FPC), also known as Brodmann area 10, contributes to many aspects of cognition. Despite these findings, however, its fundamental function and mechanism remain unclear. Recent neurophysiological results from the FPC of monkeys have implications about both. Neurons in the FPC seem to encode chosen goals at feedback time and nothing else. Goals, the places and objects that serve as targets for action, come in many forms and arise from many cognitive processes. The FPC's signal, although surprisingly simple for neurons at the apex of a prefrontal hierarchy, could promote learning about which kinds of goals and goal-generating processes produce particular costs and benefits, thereby improving future choices.     

The procerebrum is necessary for odor-aversion learning in the terrestrial slug Limax valentianus

The terrestrial slug Limax has a highly developed ability to associate the odor of some foods (e.g., carrot juice) with aversive stimuli such as the bitter taste of quinidine solution. The procerebrum (PC) is a part of the slug's brain thought to be involved in odor-aversion learning, but direct evidence is still lacking. Here we present evidence showing that the PC is essential for odor-aversion learning. Unlike sham-operated slugs, PC ablation 7 d prior to conditioning showed that most slugs did not avoid carrot juice in the memory retention test conducted 24 h after the conditioning. Slugs with the PC ablated 3 h, 1 d, 3 d, or 7 d after conditioning and examined by the memory retention test at 3 d after the PC ablation were also less likely to avoid carrot juice than sham-operated slugs. The PC ablation did not damage the ability of the slugs to sense attractive odor (everyday food) or innately aversive odor (onion or garlic). These results demonstrate that the PC is a necessary component in the retention and/or retrieval of odor-aversion memory.     

Depletion of serotonin selectively impairs short-term memory without affecting long-term memory in odor learning in the terrestrial slug Limax valentianus

The terrestrial slug Limax is able to acquire short-term and long-term memories during aversive odor-taste associative learning. We investigated the effect of the selective serotonergic neurotoxin 5,7-dihydroxytryptamine (5,7-DHT) on memory. Behavioral studies indicated that 5,7-DHT impaired short-term memory but not long-term memory. HPLC (high-performance liquid chromatography) analysis revealed that 5,7-DHT significantly reduced serotonin content in the central nervous system. The present study suggests that acquisition, retention, and/or retrieval of short-term memory involves serotonin, and neither acquisition nor retrieval of long-term memory requires serotonin at a level as high as that required for short-term memory.     

Why is intelligence associated with stability of happiness?

In the National Child Development Study, life‐course variability in happiness over 18 years was significantly negatively associated with its mean level (happier individuals were more stable in their happiness, and it was not due to the ceiling effect), as well as childhood general intelligence and all Big Five personality factors (except for Agreeableness). In a multiple regression analysis, childhood general intelligence was the strongest predictor of life‐course variability in life satisfaction, stronger than all Big Five personality factors, including Emotional stability. More intelligent individuals were significantly more stable in their happiness, and it was not entirely because: (1) they were more educated and wealthier (even though they were); (2) they were healthier (even though they were); (3) they were more stable in their marital status (even though they were); (4) they were happier (even though they were); (5) they were better able to assess their own happiness accurately (even though they were); or (6) they were better able to recall their previous responses more accurately or they were more honest in their survey responses (even though they were both). While I could exclude all of these alternative explanations, it ultimately remained unclear why more intelligent individuals were more stable in their happiness.     

The Effects of Self-Construals and Interactive Constraints on Consumer Complaint Behaviors Across Cultures

This study predicts cross-cultural associations between task and face constraints in relation to consumer complaint behaviors. Participants comprised 1200 undergraduates from Kyoto City in Japan and 420 undergraduates from Las Vegas and Tennessee in the USA. The complaint methods studied include direct voice responses, private responses (negative word of mouth and exit action), and third-party responses. We found that complaints are usually made when service failures occur at the level of co-consumption, rather than at the level of the unaccompanied consumer. The results elucidate intrapersonal and interpersonal views regarding the role played by task constraints and face constraints in mediating the relationship between independent and interdependent self-construals and complaints expressed in various ways. Discussion of these results and their implications is provided, followed by suggestions for future research on culture and conversational constraints (task and face constraints), which leads to complaint behavior, and implications of such research.     

In-situ X-ray diffraction during tensile deformation of ultrafine-grained copper using synchrotron radiation

At the synchrotron facility, Super Photon Ring – 8 GeV, in-situ X-ray diffraction during tensile deformation was conducted on ultrafine-grained Cu with a grain size of about 300 nm fabricated by equal-channel angular pressing. The diffraction profile was observed with the time resolution of about 1 s using multiple MYTHEN detectors, and the diffraction angle and the full-width at half-maximum of some Bragg peaks were determined using the pseudo-Voigt function. From the analysis of Bragg peaks, it was found out that there are microscopically three regions; elastic, plastic and transition regions. The 0.2% proof stress obtained from the stress–strain curve locates within the microscopic transition region. Microstrain was evaluated using the Williamson–Hall method and the dislocation density was also obtained from the microstrain. The dislocation density starts increasing before 0.2% proof stress, which is associated with dislocation bow-out and emission from grain boundaries. The Taylor relationship seems to be still satisfied after 0.2% proof stress.     

Women's Psychological Experiences in a Narrative Therapy-Based Group: An Analysis of Participants' Writings and Beck Depression Inventory–Second Edition

The purpose of this study was to explore women's experiences in a narrative therapy-based group conducted to help participants re-author their stories. Seven women who were either patients or individuals enrolled in Transition Support for Employment at a psychiatric clinic participated in the meetings, one every fortnight. Each session explored a theme based on narrative therapy techniques such as externalization. The participants wrote their reflections during each session, and completed the Beck Depression Inventory-Second Edition (BDI-II) during the initial and final sessions. An affinity diagram was developed to classify their written reflections into 22 lower categories (e.g., new understanding of self, forward-looking-understanding of life) and 4 upper categories (“Insight,” “Sharing with others,” “Changes with understanding of lives,” “Higher motivation”). The relationship among five lower categories comprising “Insight” was explored, and it became apparent that clarification of participants' own thoughts about social problems functioned as a mediator promoting the process. The largest portion of depressed feelings emerged during the initial session, and four participants had lower scores for BDI-II items such as self-criticism in the final session. The results suggest that the group's purpose was realized. However, future studies should examine participants' feelings more closely, especially during the initial session.     

A Study of the Conceptual Structure of Growth Mindsets and Their Impact on Self-Improvement Motivation

This study examined the conceptual structure and motivational effects of growth mindsets based on the perspective of character strengths. An internet survey was conducted with 1,000 workers (500 males and 500 females; age range 20–59 years, M = 40.1 years, SD = 10.7 years). Participants were presented with 25 strengths (i.e., intelligence and 24 character strengths) and were asked to rate their perceived competence, growth mindset, and improvement intention for each strength. The exploratory factor analyses on perceived competence, growth mindset, and improvement intention identified five common factors: wisdom, willpower, temperance, transcendence, and groupness. Moreover, regression analyses indicated that a growth mindset was more strongly related to improvement intention than perceived competence. Furthermore, regression analyses found domain-specific effects of growth mindsets on improvement intention. Thus, the intention to improve a particular strength was more closely related to that particular growth mindset than to other growth mindsets. The theoretical and educational implications are aired in the discussion section.     

Why More Intelligent Individuals Like Classical Music

The origin of values and preferences is an unresolved theoretical problem in social and behavioral sciences. The Savanna‐IQ Interaction Hypothesis, derived from the Savanna Principle and a theory of the evolution of general intelligence, suggests that more intelligent individuals are more likely to acquire and espouse evolutionarily novel values and preferences than less intelligent individuals but that general intelligence has no effect on the acquisition and espousal of evolutionarily familiar values and preferences. Recent work on the evolution of music suggests that music in its evolutionary origin was always vocal and that purely instrumental music is evolutionarily novel. The Savanna‐IQ Interaction Hypothesis would then imply that more intelligent individuals are more likely to prefer purely instrumental music than less intelligent individuals, but general intelligence has no effect on the preference for vocal music. The analyses of American (General Social Surveys) and British (British Cohort Study) data are consistent with this hypothesis. Additional analyses suggest that the effect of intelligence on musical preference is not a function of the cognitive complexity of music. Copyright © 2011 John Wiley & Sons, Ltd.