The repertoire and intentionality of gestural communication in wild chimpanzees

A growing body of evidence suggests that human language may have emerged primarily in the gestural rather than vocal domain, and that studying gestural communication in great apes is crucial to understanding language evolution. Although manual and bodily gestures are considered distinct at a neural level, there has been very limited consideration of potential differences at a behavioural level. In this study, we conducted naturalistic observations of adult wild East African chimpanzees (Pan troglodytes schweinfurthii) in order to establish a repertoire of gestures, and examine intentionality of gesture production, use and comprehension, comparing across manual and bodily gestures. At the population level, 120 distinct gesture types were identified, consisting of 65 manual gestures and 55 bodily gestures. Both bodily and manual gestures were used intentionally and effectively to attain specific goals, by signallers who were sensitive to recipient attention. However, manual gestures differed from bodily gestures in terms of communicative persistence, indicating a qualitatively different form of behavioural flexibility in achieving goals. Both repertoire size and frequency of manual gesturing were more affiliative than bodily gestures, while bodily gestures were more antagonistic. These results indicate that manual gestures may have played a significant role in the emergence of increased flexibility in great ape communication and social bonding.     

A consistent but non-coincident visual pattern facilitates the learning of spatial relations among locations

Human participants searched in a dynamic three-dimensional computer-generated virtual-environment open-field search task for four hidden goal locations arranged in a diamond configuration located in a 5 × 5 matrix of raised bins. Participants were randomly assigned to one of two groups: visual pattern or visual random. All participants experienced 30 trials in which four goal locations maintained the same spatial relations to each other (i.e., a diamond pattern), but this diamond pattern moved to random locations within the 5 × 5 matrix from trial to trial. For participants in the visual pattern group, four locations were marked in a distinct color and arranged in a diamond pattern that moved to a random location independent of the hidden spatial pattern from trial to trial throughout the experimental session. For participants in the visual random group, four random locations were marked with a distinct color and moved to random locations independent from the hidden spatial pattern from trial to trial throughout the experimental session. As a result, the visual cues for the visual pattern group were consistent but not coincident with the hidden spatial pattern, whereas the visual cues for the visual random group were neither consistent nor coincident with the hidden spatial pattern. Results indicated that participants in both groups learned the spatial configuration of goal locations and that the presence of consistent but noncoincident visual cues facilitated the learning of spatial relations among locations.     

Seeking help for non-suicidal self-injury: A social network analysis approach

Individuals who self-injure have consistently reported less perceived social support; yet, little is actually known about the support they seek out from others specifically for non-suicidal self-injury. The goal of this study was to explore characteristics of support networks of those who self-injure. Twenty-three percent reported not seeking support for self-injury, while the remaining reported smaller social networks than typical. Most participants sought help infrequently, and when they did, found supporters to be only moderately helpful. Network characteristics were found to relate to self-injury behavior and patterns emerged regarding supporters in the networks. Implications for advocacy and education are provided.     

Attention and seeing objects: The identity-crowding debate

Can unattended objects by seen? Ned Block has claimed they can on the basis of “identity-crowding.” This paper summarizes the ensuing debate with particular emphasis on the role of unconscious perception. Although unconscious perception plays an important role, it cannot support conscious object-seeing in identity-crowding. Nevertheless, unconscious perception assists in making successful judgments about unseen objects. Further, compelling conceptual evidence against seeing unattended objects places the burden of proof on Block. I argue that countability is necessary for seeing objects and sufficient for attention to them; thus, no unattended objects are seen.     

The role of holistic face processing in acquired prosopagnosia: evidence from the composite face effect

Faces are processed more holistically than other objects, and it has been suggested that the loss of holistic face processing causes acquired prosopagnosia. Support for this hypothesis comes from several cases who failed to show holistic face effects as well as the absence of reports of prosopagnosics with unequivocally normal holistic face perception. The current study examines the relationship between holistic face processing and prosopagnosia by testing seven acquired prosopagnosics with the face composite task, a classic measure of holistic face processing. To enhance the robustness of the findings, each prosopagnosic was tested with two versions of the composite task showing upright faces. We also tested an inverted condition to exclude the possibility that more general factors account for composite effects for upright faces. Four of the seven acquired prosopagnosic participants showed consistent upright face composite effects with minimal inverted face composite effects. We conclude that severe face processing deficits can co-occur with intact holistic face processing and that factors other than a loss of holistic processing contribute to the perceptual and recognition deficits in acquired prosopagnosia.     

An Animal Just Like Me: The Importance of Preserving the Identities of Companion‐Animal Owners in Disaster Contexts

The widespread tendency of modern‐day pet owners to self‐identify with their companion animals psychologically, symbolically and relationally demonstrates how the constructed identities of animal and owner are strongly linked. This becomes particularly apparent during natural disasters. In this review, the new concept of the pet‐owning self is discussed in relation to three self‐psychology perspectives: self‐extension, symbolic interactionism and selfobject relations. We purposefully depart from the realm of attachment theory to argue that these three epistemological approaches to self‐identity, although related, warrant closer examination. Although we discuss them in relation to disaster contexts, the concept of the pet‐owning self remains widely applicable. We argue for the importance of acknowledging the powerful intersubjectivity inherent to pet keeping, the inseparability of perceived pet identity from owners' experiences of the self and that preserving the cohesion of the two is an essential consideration for owners' psychological wellbeing when managing the integrated pet/owner in the face of risks posed by disaster and other hazards. Future research opportunities and implications are then discussed in the context of social identity theory.