Do great apes use emotional expressions to infer desires?

Although apes understand others’ goals and perceptions, little is known about their understanding of others’ emotional expressions. We conducted three studies following the general paradigm of Repacholi and colleagues (1997, 1998 ). In Study 1, a human reacted emotionally to the hidden contents of two boxes, after which the ape was allowed to choose one of the boxes. Apes distinguished between two of the expressed emotions (happiness and disgust) by choosing appropriately. In Studies 2 and 3, a human reacted either positively or negatively to the hidden contents of two containers; then the ape saw him eating something. When given a choice, apes correctly chose the container to which the human had reacted negatively, based on the inference that the human had just eaten the food to which he had reacted positively – and so the other container still had food left in it. These findings suggest that great apes understand both the directedness and the valence of some human emotional expressions, and can use this understanding to infer desires.     

Barriers and traps: great apes’ performance in two functionally equivalent tasks

Tool-using tasks that require subjects to overcome the obstacles to get a reward have been a major component of research investigating causal knowledge in primates. Much of the debate in this research has focused on whether subjects simply use certain stimulus features or instead use more functionally relevant information regarding the effect that certain features may have on a moving reward. Here, we presented two obstacle tasks, a trap platform and a barrier platform, to 22 great apes. Although perceptually similar, these two tasks contain two perceptually different but functionally equivalent obstacles: a trap and a barrier. In a pre-exposure phase, subjects either experienced an obstacle task or a task without any obstacle. In the transfer phase, all subjects were presented with an obstacle task, either the trap platform or the barrier platform. Our results show that those subjects who received an obstacle task prior to the second task performed better than those who first received a non-obstacle task. The type of obstacle task that subjects received first did not have any effect on their performance in the transfer phase. We suggest that apes possess some knowledge about the effects that obstacles have on slow-moving unsupported objects.     

Are apes essentialists? Scope and limits of psychological essentialism in great apes

Human reasoning is characterized by psychological essentialism (Gelman in The essential child: origins of essentialism in everyday thought. Oxford University Press, New York, 2003): when reasoning about objects, we distinguish between deep essential properties defining the object’s kind and identity, and merely superficial features that can be changed without altering the object’s identity. To date, it is unclear whether psychological essentialism is based on the acquisition of linguistic means (such as kind terms) and therefore uniquely human, or whether it is a more fundamental cognitive capacity which might be present also in the absence of language. In the present study, we addressed this question by testing whether, and if so, under which circumstances non-human apes also rely on psychological essentialism to identify objects. For this purpose, we adapted classical verbal transformation scenarios used in research on psychological essentialism (Keil in Concepts, kinds, and cognitive development. MIT Press, Cambridge, 1989) and implemented them in two nonverbal tasks: first, a box task, typically used to test object individuation (Experiment 1), and second, an object choice task, typically used to test object discrimination, object preferences and logical inferences (Experiments 2–4). Taken together, the results of the four experiments suggest that under suitable circumstances (when memory and other task demands are minimized), great apes engage in basic forms of essentialist reasoning. Psychological essentialism is thus possible also in the absence of language.     

From great commission to inclusive education: a tangible illustration of missionaries’ legacy

This article analysed missionaries’ roles in the development of general and special education by examining the relationship between the Great Commission and education and the biblical perspective on disabilities as the foundational links between their work and inclusive education. While missionaries have not been directly involved in the practices of inclusive education today, their work in initiating and formalising special education services has facilitated a more welcoming attitude toward individuals with disabilities, and propelled governments around the globe to make special and inclusive education a public responsibility when socio-political environments demand it. To provide a concrete illustration, this article used Hong Kong as an example by examining missionaries’ key involvements and impact in its development of public education from the early colonial era to today’s inclusive education. The missionaries’ legacy in Hong Kong’s inclusive education development lay in their nurturing of Christian educators as supported by a high number of public Christian schools and Christian educators advocated for inclusive education, and in their efforts to formalise special education during the early colonial era (175).     

Reaching around barriers: the performance of the great apes and 3–5-year-old children

Inhibitory control has been suggested as a key predictive measure of problem-solving skills in human and nonhuman animals. However, there has yet to be a direct comparison of the inhibitory skills of the nonhuman apes and their development in human children. We compared the inhibitory skills of all great ape species, including 3–5-year-old children in a detour-reaching task, which required subjects to avoid reaching directly for food and instead use an indirect reaching method to successfully obtain the food. We tested 22 chimpanzees, 18 bonobos, 18 orangutans, 6 gorillas and 42 children. Our sample included chimpanzees, bonobos and orangutans housed in zoos (N = 27) and others housed in sanctuaries in their native habitats (N = 37). Overall, orangutans were the most skilful apes, including human children. As expected older children outperformed younger children. Sanctuary chimpanzees and bonobos outperformed their zoo counterparts whereas there was no difference between the two orangutan samples. Most zoo chimpanzees and bonobos failed to solve the original task, but improved their performance with additional training, although the training method determined to a considerable extent the level of success that the apes achieved in a transfer phase. In general, the performance of the older children was far from perfect and comparable to some of the nonhuman apes tested.     

The great subjective back-referral debate: Do neural responses increase during a train of stimuli?

Evidence is summarised for and against the hypothesis that potentiation or facilitation of neural responses during a train of threshold-level stimuli occurred in the experiments reported by . It is concluded that such potentiation probably did occur. Since the main arguments for the existence of subjective backwards referral () take it as given that such potentiation did not occur, it is further concluded that the main arguments for the existence of subjective backwards referral fail.     

The effect of contemplation and meditation on ‘great compassion’ on the psychological well-being of adolescents

This study aimed to evaluate the effect of contemplation and meditation (CM) training, with a focus on developing great compassion, on the psychological well-being (PWB) of adolescents. Participants (N = 51, mean age = 15.8) were randomly allocated to either CM training (n = 26) or a comparison group (n = 25). Both groups completed measures of PWB before and after the intervention. Adolescents who received CM training showed statistically significant increases in environmental mastery and personal growth, as well as decreased negative affect compared to the comparison group. Girls in the experimental group also showed a significant decrease in negative affect compared with boys in the experimental group. Both the experimental and comparison groups demonstrated increased life satisfaction, environmental mastery, self-acceptance, autonomy, and purpose in life. There were no changes in positive affect and positive relations with others for both groups.     

God is great – but not necessary? On Ara Norenzayan,Big Gods (2013)

Norenzayan provides ample evidence to support the claim that beliefs about moralizing Big Gods correlate with prosocial behavior. Atheists, for their part, are the most mistrusted minority wherever there is a widespread belief in moralizing gods. Projecting these patterns of thought and behavior on to our ancestors 10 000 years back is risky, though. It is a plausible hypothesis that prosociality in societies where people meet anonymous others on a regular basis may have coevolved with beliefs about Big Gods, but it remains historically speculative and the direction of causality is impossible to establish.     

Why are we fighting? A view of the “great war” from across the ocean

This article examines the dispute concerning the meaning of World War I among leading American intellectuals in the period 1915–1918. Taking center stage here are the views of one of the founding fathers of American pragmatism, John Dewey (1859–1952), on the causes of the “Great War,” its higher meaning and goals which led to America’s entry into the War and also its influence on the social reconstruction of American society and the post-War world order. The final section of the article is devoted to a critique of Dewey’s position towards American participation in the War by another famous American intellectual, Randolph Bourne (1886–1918), who laid the foundations for a tradition of social criticism in the U.S. in the twentieth century.     

Great man or great myth? A quantitative review of the relationship between individual differences and leader effectiveness

This study presents a meta‐analysis of 25 individual differences proposed to be related to effective leadership, with an emphasis on comparing trait‐like (e.g. personality and intelligence) to state‐like individual differences (e.g. knowledge and skills). The results indicate that although both trait‐like (achievement motivation, energy, dominance, honesty/integrity, self‐confidence, creativity, and charisma) and state‐like (interpersonal skills, oral communication, written communication, administrative/management skills, problem‐solving skills, and decision making) individual differences were consistent predictors of effective leadership, the impact of trait‐like and state‐like individual differences was modest overall and did not differ substantially (ρ= .27 and .26, respectively). Finally, organizational level of the leader, method of predictor and criterion measurement, and organization type moderated the relationship between individual differences and effective leadership.     

A critical review of the “enculturation hypothesis”: the effects of human rearing on great ape social cognition

Numerous investigators have argued that early ontogenetic immersion in sociocultural environments facilitates cognitive developmental change in human-reared great apes more characteristic of Homo sapiens than of their own species. Such revamping of core, species-typical psychological systems might be manifest, according to this argument, in the emergence of mental representational competencies, a set of social cognitive skills theoretically consigned to humans alone. Human-reared great apes capacity to engage in true imitation, in which both the means and ends of demonstrated actions are reproduced with fairly high rates of fidelity, and laboratory great apes failure to do so, has frequently been interpreted as reflecting an emergent understanding of intentionality in the former. Although this epigenetic model of the effects of enculturation on social cognitive systems may be well-founded and theoretically justified in the biological literature, alternative models stressing behavioral as opposed to representational change have been largely overlooked. Here I review some of the controversy surrounding enculturation in great apes, and present an alternative nonmentalistic version of the enculturation hypothesis that can also account for enhanced imitative performance on object-oriented problem-solving tasks in human-reared animals.     

What does an intermediate success rate mean? An analysis of a Piagetian liquid conservation task in the great apes

The study investigates what an intermediate success rate means in bonobos, chimpanzees, and orangutans. Apes participated in liquid conservation experiments where they had to track the larger of two different quantities of juice after various kinds of transformations [Suda, C., & Call, J. (2004). Piagetian liquid conservation in the great apes (Pan paniscus, Pan troglodytes, and Pongo pygmaeus). Journal of Comparative Psychology, 118, 265-279). When making a decision, apes sometimes demonstrated hesitant behavior, concurrently pointing to both alternatives or successively changing their choice. Moderately successful apes showed more hesitation than highly successful or unsuccessful apes. The results are consistent with the cognitive conflict model: The experiments created a higher degree of cognitive conflict on moderately successful apes than on very successful or unsuccessful apes. This indicates that an intermediate performance reflects the joint operation and potential conflict between two different cognitive strategies (identity and appearance) inherent to the Piagetian conservation task.     

Manipulation of walnuts to facilitate opening by the great spotted woodpecker (Picoides major): is it tool use?

True tool use has been documented in some bird species, but to our knowledge, it has not been shown in woodpeckers. Here, we investigated the ability of Picoides major to open nuts of Juglans mandshurica by consistently inserting walnuts between tree branches in a specific position that facilitated nut opening. As seen in these birds, we showed that woodpeckers removed 96 % of the nuts of J. mandshurica from experimental seed trays and inserted each nut in a precise position that specifically allowed nut cracking. When we inserted nuts in an alternative position, woodpeckers manipulated and repositioned nuts to allow nut opening. In contrast, when we inserted the nuts in positions preferred for nut opening, woodpeckers did not alter their position and instead opened the nuts. We suggest that the origin of this behavior, as in other forms of tool use, likely requires a higher cognitive ability in these birds.     

Reducing the neural search space for hominid cognition: What distinguishes human and great ape brains from those of small apes?

Differences in the psychological capacities of closely related species are likely due to differences in their brains. Here, we review neuroanatomical comparisons between hominids (i.e., great apes and humans) and their closest living relatives, the hylobatids (i.e., small apes). We report the differences in quantitative, as well as qualitative, neural characteristics on the basis of 19 comparative studies that each included representatives of all hominid genera and at least one genus of hylobatid. The current data are patchy, based on a small number of hylobatids and few neuroanatomical features. Yet a systematic interspecies comparison could help reduce the neuroanatomical search space for the neural correlates underlying psychological abilities restricted to hominids. We illustrate the potential power of this approach by discussing the neural features of visual self-recognition.     

Approaching the rasa-lila of ‘great men': interlinking Western ‘intuitive’ theologies with traditions of Bengal in the Brahmo Samaj

Abstract

Among contemporary sociologists who critically analyze the specific structure and dynamics of current or ‘late-modern’ societies, it is very common to refer to processes of increasing individualization as an explanation for larger social trends. Presuming a Protestant Christian genealogy for processes of individualization they tend to underemphasize the extent to which modern constellations are indebted in various ways to imperialism and the colonial encounter. To approach the complicated issue of encounter and mutual interferences, first an understanding of the categories involved in the interaction from within the traditions of the colonized is necessary. Only then will we be able to determine the way in which concepts of the colonizers were interpreted, understood, and appropriated. This essay aims to show that links were drawn between the global discourse on an experiential approach to religion, emphasizing the ‘Self,' and regional Vaishnava bhakti traditions of Bengal in the Bharatbarsiya Brahmo Samaj. This phase of increasing religious individualization with its focus on reliance on the ‘Self’ also contributed to preparing the ground for nationalistic readings of Indian traditions.