Can dogs use vocal intonation as a social referencing cue in an object choice task?

Evidence from the literature indicates that dogs’ choices can be influenced by human-delivered social cues, such as pointing, and pointing combined with facial expression, intonation (i.e., rising and falling voice pitch), and/or words. The present study used an object choice task to investigate whether intonation conveys unique information in the absence of other salient cues. We removed facial expression cues and speech information by delivering cues with the experimenter’s back to the dog and by using nonword vocalizations. During each trial, the dog was presented with pairs of the following three vocal cues: Positive (happy-sounding), Negative (sad-sounding), and Breath (neutral control). In Experiment 1, where dogs received only these vocal cue pairings, dogs preferred the Positive intonation, and there was no difference in choice behavior between Negative or Breath. In Experiment 2, we included a point cue with one of the two vocal cues in each pairing. Here, dogs preferred containers receiving pointing cues as well as Negative intonation, and preference was greatest when both of these cues were presented together. Taken together, these findings indicate that dogs can indeed extract information from vocal intonation alone, and may use intonation as a social referencing cue. However, the effect of intonation on behavior appears to be strongly influenced by the presence of pointing, which is known to be a highly salient visual cue for dogs. It is possible that in the presence of a point cue, intonation may shift from informative to instructive.     

What's social about social learning?

Research on social learning in animals has revealed a rich variety of cases where animals--from caddis fly larvae to chimpanzees--acquire biologically important information by observing the actions of others. A great deal is known about the adaptive functions of social learning, but very little about the cognitive mechanisms that make it possible. Even in the case of imitation, a type of social learning studied in both comparative psychology and cognitive science, there has been minimal contact between the two disciplines. Social learning has been isolated from cognitive science by two longstanding assumptions: that it depends on a set of special-purpose modules--cognitive adaptations for social living; and that these learning mechanisms are largely distinct from the processes mediating human social cognition. Recent research challenges these assumptions by showing that social learning covaries with asocial learning; occurs in solitary animals; and exhibits the same features in diverse species, including humans. Drawing on this evidence, I argue that social and asocial learning depend on the same basic learning mechanisms; these are adapted for the detection of predictive relationships in all natural domains; and they are associative mechanisms--processes that encode information for long-term storage by forging excitatory and inhibitory links between event representations. Thus, human and nonhuman social learning are continuous, and social learning is adaptively specialized--it becomes distinctively "social"--only when input mechanisms (perceptual, attentional, and motivational processes) are phylogenetically or ontogenetically tuned to other agents.     

Can learning disabled students effectively use separate answer sheets?

101 regular class and learning disabled students were administered three subtests of the Comprehensive Test of Basic Skills for which all correct answers had been identified in the students' test booklet. Analysis of the completed separate answer sheets indicated that learning disabled students answered fewer total items than their nondisabled peers but did not differ with respect to percent of items answered correctly. In addition, nonsignificant differences were found for number of answer spaces filled in outside the line. Implications for further research and training are given.     

Does lacking information about your affordances impact your perception of others’ affordances? A test of the embodied simulation hypothesis

Psychonomic Bulletin & Review - It has been argued that observers perceive actors’ affordances via embodied simulation, that is, first perceiving their own affordance, which serves as a...     

Editorial: Harmful or helpful to learning? The impact of seductive details on learning and instruction

Most previous research found negative effects on learning outcomes when interesting but irrelevant information (i.e., seductive details) is added to an instruction. To what degree such effects are bound to specific conditions is in the focus of this special issue. Specifically, 11 empirical studies are reported within this special issue. They all address the topic of seductive details in learning and instruction by focusing either on cognitive moderators (e.g., working memory capacity and current beliefs) or on noncognitive moderators (e.g., arousal and affect) of the seductive details effect. Taken together, results from the empirical studies hint towards new moderators and suggest that the negative effects of seductive details on learning outcomes may be smaller than expected based on previous research.     

When does social learning become cultural learning?

Developmental research on selective social learning, or ‘social learning strategies’, is currently a rich source of information about when children copy behaviour, and who they prefer to copy. It also has the potential to tell us when and how human social learning becomes cultural learning; i.e. mediated by psychological mechanisms that are specialized, genetically or culturally, to promote cultural inheritance. However, this review article argues that, to realize its potential, research on the development of selective social learning needs more clearly to distinguish functional from mechanistic explanation; to achieve integration with research on attention and learning in adult humans and ‘dumb’ animals; and to recognize that psychological mechanisms can be specialized, not only by genetic evolution, but also by associative learning and cultural evolution.     

Evolutionary perspectives on imitation: is a comparative psychology of social learning possible?

Studies of imitation in animals have become numerous in recent times, but do they contribute to a comparative psychology of social learning? We review this burgeoning field to identify the problems and prospects for such a goal. Difficulties of two main kinds are identified. First, researchers have tackled questions about social learning from at least three very different theoretical perspectives, the "phylogenetic", "animal model", and "adaptational". We examine the conflicts between them and consider the scope for integration. A second difficulty arises in the methodological approaches used in the discipline. In relation to one of these - survey reviews of published studies - we tabulate and compare the contrasting conclusions of nine articles that together review 36 studies. The basis for authors' disagreements, including the matters of perceptual opacity, novelty, sequential structure, and goal representation, are examined. In relation to the other key method, comparative experimentation, we identify 12 studies that have explicitly compared species' imitative ability on similar tasks. We examine the principal problems of comparing like with like in these studies and consider solutions, the most powerful of which we propose to be the use of a systematic range of task designs, rather than any single "gold standard" task.     

Will the most informative object stand? Determining the impact of structural context on informativeness judgements

A fundamental unsolved problem in the cognitive sciences concerns why, how, and to what extent humans judge object stimuli as conveying different amounts of information. Central to this problem is how the notion of informativeness is conceptualised by humans in the first place. In this paper, we investigate this question from the standpoint of how the structure of categories of objects influences informativeness judgements about their members. Results from our two experiments show that the structural or relational context surrounding single-object cues from a categorical stimulus largely determines such informativeness judgements. Moreover, we found that object cues elicit absolute magnitude judgements about their associated concept that are not consistent with the prototype interpretation of the concept. We were able to account for over 90% of the variance in the data from our two judgement experiments with a general theory and measure of information referred to as Representational Information.     

Can competitive paradigms increase the validity of experiments on primate social cognition?

Experiments vary in their ability to distinguish between competing hypotheses. In tests on primate cognition the majority of this variation is due to an experimenter's ability to test primates in valid settings while providing the adequate amount of experimental control. While experimenters studying primate cognition can use methods of control perfected in captivity, it is still very unclear how to design and then objectively evaluate the external validity of new experimental paradigms. I recommend that more effort be allocated to specify how to create relevant test settings for primates. Primate social life is highly competitive. This means that all aspects of primates themselves, including their cognitive abilities, have likely been shaped by the need to out-compete conspecifics. Based on this hypothesis, sophisticated cognitive abilities of primates might best be demonstrated in competitive contexts. Thus, it is suggested that one possible measure of validity is whether investigators integrate a competitive component into their experimental designs. To evaluate this methodological prediction I review the literature on chimpanzee perspective-taking as a case study including several recent studies that include a competitive component in their experimental designs. Accepted after revision: 8 April 2001 Electronic Publication     

Does social identification harm or serve as a buffer? The impact of social identification on anger after experiencing social discrimination

Research on targets' affective reactions to social discrimination has not yet addressed self- and other-directed anger at the same time. Four studies tested the hypothesis that the perceived cause of negative feedback moderates the impact of social identification on self-directed anger. In Studies 1 and 2, high levels of social identification led to less self-directed anger when negative feedback was attributed to social discrimination but not when it was attributed either to other external causes or internally. In Study 3, a cross-lagged design showed that higher identification led to less self-directed anger when negative feedback was attributed to social discrimination but not the other way around. This effect was found using scenarios (Studies 1-3) and also when using the recollection of personal experiences to manipulate attribution (Study 4). These results indicate that following social discrimination, social identification protects the self and does not increase individual vulnerability.     

Can infants' object concepts be trained?

Decades of research and debate on the origins of object permanence in infancy have contrasted various types of learning with possible innate contributions. A recent paper by Johnson et al. adds a new perspective to this debate by reporting that even very brief training periods can dramatically influence infants' persisting object representations. Such training studies have the potential to constrain 'nature versus nurture' debates in novel ways, although important challenges remain.     

Is object texture a constraint on human prehension?: kinematic evidence

The present experiment determined whether object texture influenced the transport and grasp components of human prehension. Infrared markers placed on the index finger, thumb, and wrist were recorded using a WATSMART system. The test objects were cylindrical dowels (103 mm high, 25 mm diameter, and 150 g in weight) of various surface materials (plain metal, coated with Vaseline, and covered with coarse sandpaper). Only temporal kinematic measures were affected by texture: Movement time (ms), time after peak deceleration (ms), percentages of movement time following maximum aperture, velocity, and deceleration were all significantly greater for the slippery dowel than the normal and rough dowels. Results indicated that the increased time associated with the slippery dowel could be explained entirely by increased time between contact with the dowel and dowel lift. Thus, these results are like those of Weir, MacKenzie, Marteniuk, Cargoe, and Frazer (1991), in which object weight was shown not to affect the free-motion phase, which includes the transport and grasp components of prehension. It appears that intrinsic object properties like weight and texture affect only the finger-object interaction phase of prehension; subsequent research is needed to dissociate inertial and surface friction effects while in contact with objects     

Is pressure stressful? The impact of pressure on the stress response and category learning

We examined the basic question of whether pressure is stressful. We proposed that when examining the role of stress or pressure in cognitive performance, it is important to consider the type of pressure, the stress response, and the aspect of cognition assessed. In Experiment 1, outcome pressure was not experienced as stressful but did lead to impaired performance on a rule-based (RB) category-learning task, but not on a more procedural information-integration (II) task. In Experiment 2, the addition of monitoring pressure resulted in a modest stress response to combined pressure and impairment on both tasks. Across experiments, higher stress appraisals were associated with decreased performance on the RB, but not on the II, task. In turn, higher stress reactivity (i.e., heart rate) was associated with enhanced performance on the II, but not on the RB, task. This work represents an initial step toward integrating the stress cognition and pressure cognition literatures and suggests that integrating these fields may require consideration of the type of pressure, the stress response, and the cognitive system mediating performance.     

The impact of social relationships on Ugandan children’s sharing decisions

Recent studies provided evidence for an impact of social relations on preschool children’s sharing behavior. Children have been shown to be more generous towards friends than nonfriends or strangers. As evidence comes largely from studies with western children, little is known about cross-cultural differences and commonalities in this pattern. Here, we show that preschool and elementary school aged Ugandan children show high levels of generosity independent of the social relationships with the recipient. This finding points to societal differences in early sharing. The results are discussed in terms of a formative impact of cultural traditions on the early development of sharing in the preschool years.     

Can transcranial direct current stimulation (tDCS) of the cerebellum improve implicit social and cognitive sequence learning?

Accumulating evidence shows that the posterior cerebellum is involved in mentalizing inferences of social events by detecting sequence information in these events, and building and updating internal models of these sequences. By applying anodal and sham cerebellar transcranial direct current stimulation (tDCS) on the posteromedial cerebellum of healthy participants, and using a serial reaction time (SRT) task paradigm, the current study examined the causal involvement of the cerebellum in implicitly learning sequences of social beliefs of others (Belief SRT) and non-social colored shapes (Cognitive SRT). Apart from the social or cognitive domain differences, both tasks were structurally identical. Results of anodal stimulation (i.e., 2 mA for 20 min) during the social Belief SRT task, did not show significant improvement in reaction times, however it did reveal generally faster responses for the Cognitive SRT task. This improved performance could also be observed after the cessation of stimulation after 30 min, and up to one week later. Our findings suggest a general positive effect of anodal cerebellar tDCS on implicit non-social Cognitive sequence learning, supporting a causal role of the cerebellum in this learning process. We speculate that the lack of tDCS modulation of the social Belief SRT task is due to the familiar and overlearned nature of attributing social beliefs, suggesting that easy and automatized tasks leave little room for improvement through tDCS.     

Constraints on word learning?

Recent studies that propose constraints on word learning are reviewed. Theoretical implications of constraints hypotheses are examined in the light of data from other prior and current studies of children's word learning at different developmental points. It is concluded that there is no evidence for strong internal constraints on the acquisition of words by young children of the kind proposed. process are suggested as more adequate explanations, based on the full research record.     

Are students' beliefs about knowledge and learning associated with their reported use of learning strategies?

Background. Although considerable research has examined beliefs and learning outcomes (e.g. Schommer, 1990, 1993a, 1993b ; Schommer & Dunnell, 1997 ), little has looked at the relationship between beliefs and the actual learning process. Aims. This research examines the relationship between beliefs about learning and knowledge, and reports of learning strategy‐use relevant for successful text comprehension. Sample. Participants were 81 Norwegian university students who had studied from 1 to 4 years in a range of disciplines. Method. Students' beliefs about knowledge and learning were measured with the Schommer Epistemological Questionnaire (SEQ; Schommer, 1998b ). Learning strategies particularly useful for text‐based learning were measured with the Motivated Strategies for Learning Questionnaire (MSLQ; Pintrich, Smith, Garcia, & McKeachie, 1991 ). A correlational analysis between measures and full regression analyses of how beliefs influence strategy selection were performed. Results. Beliefs about how thoroughly knowledge is integrated in networks (simple) and how fixed the ability to learn is from birth (fixed) contributed significantly to reported strategy use: Simple to rehearsal and organizational strategies, fixed to elaboration and critical thinking strategies, and a combination of simple and fixed to strategies relevant to the thoughtful monitoring of learning tasks. Beliefs about how certain knowledge is (certain) and how quickly learning can be expected to occur (quick) were not found to contribute to reported learning‐ strategy use in any significant way. Conclusion. Some, but not all, beliefs about knowledge and learning offer insight into students' reported use of learning strategies relevant for reading course literature.     

The impact of accountability on teachers’ assessments of student performance: a social cognitive analysis

Research on teachers’ judgments of student performance has demonstrated that educational assessments may be biased or may more correctly take the achievements of students into account depending on teachers’ motivations while making the judgment. Building on research on social judgment formation the present investigation examined whether the accountability of teachers has an influence on judgment formation. We predicted that unaccountable teachers would activate social categories and use them for the assessment, whereas accountable teachers’ attention would be directed to individual attributes of students. Using secondary school teachers as participants, three studies investigating teachers’ assessments, inferences and memory for students’ attributes supported these hypotheses. Thus, accountability appears to be a moderator of social information processing and judgment formation in the domain of educational assessments.