Affective forecasting in an orangutan: predicting the hedonic outcome of novel juice mixes

Affective forecasting is an ability that allows the prediction of the hedonic outcome of never-before experienced situations, by mentally recombining elements of prior experiences into possible scenarios, and pre-experiencing what these might feel like. It has been hypothesised that this ability is uniquely human. For example, given prior experience with the ingredients, but in the absence of direct experience with the mixture, only humans are said to be able to predict that lemonade tastes better with sugar than without it. Non-human animals, on the other hand, are claimed to be confined to predicting—exclusively and inflexibly—the outcome of previously experienced situations. Relying on gustatory stimuli, we devised a non-verbal method for assessing affective forecasting and tested comparatively one Sumatran orangutan and ten human participants. Administered as binary choices, the test required the participants to mentally construct novel juice blends from familiar ingredients and to make hedonic predictions concerning the ensuing mixes. The orangutan’s performance was within the range of that shown by the humans. Both species made consistent choices that reflected independently measured taste preferences for the stimuli. Statistical models fitted to the data confirmed the predictive accuracy of such a relationship. The orangutan, just like humans, thus seems to have been able to make hedonic predictions concerning never-before experienced events.     

Foresight, function representation, and social intelligence in the great apes

We find problems with Vaesen's treatment of the primatological research, in particular his analysis of foresight, function representation, and social intelligence. We argue that his criticism of research on foresight in great apes is misguided. His claim that primates do not attach functions to particular objects is also problematic. Finally, his analysis of theory of mind neglects many distinctions.     

Contagious yawning in domestic dog puppies (Canis lupus familiaris): the effect of ontogeny and emotional closeness on low-level imitation in dogs

Contagious yawning is a well-documented phenomenon in humans and has recently attracted much attention from developmental and comparative sciences. The function, development and underlying mechanisms of the phenomenon, however, remain largely unclear. Contagious yawning has been demonstrated in dogs and several non-human primate species, and theoretically and empirically associated with empathy in humans and non-human primates. Evidence of emotional closeness modulating contagious yawning in dogs has, nonetheless, been contradictory. Humans show a developmental increase in susceptibility to yawn contagion, with typically developing children displaying a substantial increase at the age of four, when a number of cognitive abilities (e.g. accurate identification of others’ emotions) begin to clearly manifest. Explicit tests of yawn contagion in non-human animals have, however, thus far only involved adult individuals. Here, we report a study of the ontogeny of domestic dogs’ (Canis lupus familiaris) susceptibility to yawn contagion, and whether emotional closeness to the yawning model affects this. Thirty-five dogs, aged 4–14 months, observed a familiar and unfamiliar human repeatedly yawn or gape. The dogs yawned contagiously, but emotional closeness with the model did not affect the strength of contagion, raising questions as to recent evidence of emotionally modulated auditory contagious yawning in dogs. The dogs showed a developmental effect, with only dogs above 7 months evidencing contagion. The results support the notion of a developmental increase in dogs’ attention to others and identification of others’ emotional states and suggest that yawn contagion is underpinned by developmental processes shared by humans and other animals.     

Factors associated with physical spousal abuse of women during pregnancy in Bangladesh

CONTEXT: Violence toward pregnant women is a gross violation of human rights with adverse health consequences for the woman and potentially for her fetus; however, few studies have examined factors associated with such abuse in developing countries or with population-based data. METHODS: A sample of 2,553 ever-pregnant women aged 15-49 from one urban and one rural site in Bangladesh were surveyed in 2001 as part of a World Health Organization multicountry study. Multilevel logistic regression analysis was used to examine factors associated with physical spousal abuse of women during pregnancy. RESULTS: Urban and rural women whose mother or mother-in-law had experienced physical spousal abuse had increased odds of experiencing abuse during pregnancy (odds ratios, 2.1-3.4); increased spousal communication was negatively associated with the outcome in both settings (0.6 and 0.7). Among urban women, being older than 19, having a husband with more than 10 years of education and being from certain higher income quartiles were negatively associated with abuse (0.2-0.5); living in a community highly concerned about crime was positively associated with abuse (1.1). Among rural women, being able to depend on natal family support in a crisis was negatively associated with abuse (0.5); being in a marriage that involved dowry demands and being Muslim were positively associated with abuse (1.8 and 3.6, respectively). CONCLUSIONS: The message that a family history of spousal violence increases a daughter's risk of such abuse should be widely communicated. Further research is needed to determine whether increased couple communication reduces the likelihood of violence or whether absence of violence leads to increased couple communication.     

VIII—Two Act-Omission Paradoxes

There are two ways in which the act-omission doctrine, which implies that it may be permissible to let people die or be killed when it is wrong to kill them, gives rise to a paradox. First, it may be that when you let a victim be killed, you let yourself kill this victim. On the assumption that, if it would be wrong of you to act in a certain fashion, it would be wrong of you let yourself act in this fashion, this yields the paradox that it is both permissible and impermissible to let yourself act in this fashion. Second, you may let yourself kill somebody by letting an action you have already initiated cause death, e.g., by not lending a helping hand to somebody you have pushed. This, too, yields the paradox that it is both permissible and impermissible to let yourself kill if you are in a situation in which killing is impermissible but letting be killed permissible.     

Self-Doubt: Why We are not Identical to Things of Any Kind

There are two fundamental aspects of the notion of a self: (i) it is the owner of one’s experiences, that to which one’s experiences are properly attributed, and (ii) it perceives itself. (ii) is a condition on the self’s being capable of attributing experiences to itself or being introspectively aware of its experiences, which constitutes a third, higher‐order aspect of the self. I claim that it is a common sense assumption, enshrined in the use of ‘I’, that one’s body satisfies the first two aspects. I then argue that these two aspects are not really satisfied by one’s body, which is essentially a human organism. Nor are they satisfied by anything of any other kind. So we are not identical to things of any kind, since one can be identical only to that which is one’s self or is the referent of one’s uses of ‘I’.     

Cause,Effect, And Fake Causation

The possibility of apparently negative causation has been discussed in a number of recent works on causation, but the discussion has suffered from beingscattered. In this paper, the problem of apparently negative causation and its attemptedsolutions are examined in more detail. I discuss and discard three attempts that have beensuggested in the literature. My conclusion is negative: Negative causation shows that thetraditional cause & effect view is inadequate. A more unified causal perspective is needed.     

Type of stimulus mediates the relationship between working-memory performance and type of precocity

The relationship between type of stimulus (numeric and verbal) and type of precocity (mathematical and verbal) was examined in tasks designed to tap three aspects of working memory: encoding, capacity, and manipulation of information. The tasks included semantic categorization, odd-even categorization, recall of five-item lists after semantic categorization, and recall of items in a continuous paired-associates task. Correlations between task performance and the mathematical and verbal portions of the Scholastic Aptitude Test (SAT-M and SAT-V) were computed for gifted youth. There were no sex differences in the performance measures or in the pattern of correlations between performance and SAT scores. The analysis revealed positive relationships between SAT-M scores and numeric categorization latency, recall in the continuous paired-associate task with words and digits, and recall of digit lists. SAT-V scores were related only to word recall in the continuous paired-associate task and recall of word lists. In the working-memory tasks used, mathematical precocity is more strongly related to performance than is verbal precocity. The relationship is especially strong with numeric stimuli, even when the numeric stimuli are simply items to be remembered. The relationship between type of stimulus and type of precocity suggests underlying differences between verbally and mathematically precocious youth in how different types of stimuli are represented in memory.     

On Heller,Mönks,and Passow's International Handbook of Research and Development of Giftedness and Talent

The authors tested the hypothesis that a broad or narrow scope of perceptual attention engenders an analogously broad or narrow focus of conceptual attention, which in turn bolsters or undermines creative generation. In the first two experiments, participants completed visual tasks that forced them to focus perceptual attention on a comparatively broad or narrow visual area. As predicted, broad, compared to narrow initial focusing of perceptual attention subsequently led to generation of more original uses for a brick (Experiment 1) and generation of more unusual category exemplars (Experiment 2). In Experiment 3, participants were merely asked to contract their frontalis versus corrugator muscles, producing rudimentary peripheral feedback associated with broad versus narrow perceptual focus. As predicted, frontalis contraction, relative to corrugator contraction, led to the production of more original uses for a pair of scissors. Together, these three experiments provided converging initial support for our attentional priming hypothesis, suggesting that situationally induced variations in the scope of perceptual attention (and simple cues associated with such variations) may correspondingly expand or constrict the focus of conceptual attention within the semantic network, thereby improving or diminishing creativity.