Victim Selection and Kinematics: A Point-Light Investigation of Vulnerability to Attack

Three experiments used a point-light methodology to investigate whether movement style specifies vulnerability to physical attack. Both female (Experiment 1) and male (Experiment 2) walkers could be differentiated according to ease-of-attack based solely on the kinematic information provided whilst walking. Specific walking style features predicted ease-of-attack and profiles of prototypically easy to attack and difficult to attack walkers were identified. Variations in walking style as a function of clothing and footwear style were also shown to predict differences in ease-of-attack ratings (Experiment 3). Theoretical and practical implications of these findings are considered.     

A theorem connecting Shapley-Owen power scores and the radius of the yolk in two dimensions

Conclusions The link derived in Theorem 1 between centrality (relative to the yolk) and power (defined in Shapley-Owen terms) has important political implications. For example, if the policy is composed of interest groups, then any interest group whose ideal point falls far from the political center (defined as the center of the yolk) can have very little power in Shapley-Owen terms. Power is not only a function of the number of votes an interest group has, but it is also a function of its position. Centrally located interest groups have more power than peripheral ones.In terms of policy positions, Shapley-Owen power refers to the power to move an outcome from one median line to another-shifts that are not likely to make much difference to the actor who is pivotal. However, if an actor can exact rents for being the pivotal actor, then these differences are important, and centrally located actors may be in the best position to derive non-policy benefits from having this ability to shift outcomes by a shift of their vote.     

Mall walking and urban sociability

In this article we examine a relatively new social activity: mall walking: This is a low‐impact, aerobic workout in which participants walk for exercise in the climate‐controlled, safe environment of the shopping mall before it is officially open to the public. Participants mall walk for various reasons and display differing levels of commitment. However, through their sociability and interaction, a shared environment of mall walking has been constructed and maintained. In sum, mall walkers have transformed the physical setting of the mall into one where, in conjunction with exercise, the quest for sociability can be somewhat satisfied.     

Prismatic effects of negative ties

Research on negative ties has focused primarily on the harm they do. In this paper, we show that negative ties can also have beneficial effects. We argue that, like positive ties, negative ties can link actors together in the minds of observers. As a result, we theorize that negative ties with high-status actors can benefit a focal actor, whereas negative ties with low-status actors can harm the focal actor. This prismatic effect depends on the existing status of the focal actor: a focal actor of low status is likely to benefit far more from negative ties with high-status actors and suffer more from negative ties with low-status actors than will an actor of high-status. To test our ideas, we analyze the phenomenon of "diss songs" in hip-hop music. A diss song is a song in which a rapper makes derogatory comments about another rapper, constituting a negative tie. We analyze the effects of negative ties among 53 rappers over 20 points in time on audience reaction as measured by record sales. We find that negative ties with high-status actors enhance future sales for low-status actors. However, negative ties with lower-status actors have no effect on the future sales of both low- and high-status actors. Just as some researchers have reported both positive and negative consequences of social capital, our study demonstrates that negative ties can also have both positive and negative outcomes.     

Big girls don't frown,big boys don't cry—Gender differences of professional actors in communicating emotion via facial expression

It was tested whether professional actors would be able to communicate emotional meaning via facial expression when this is presented to judges without context information. Forty takes were selected from movies, depicting a female or a male actor in close-up showing facial expression. These close-ups were selected by two expert judges, who knew the complete movie and had to agree on the emotion expressed or expected to be expressed by the female or male actor in the respective take. Five takes each were selected to represent the basic emotions of joy, sadness, fear, and anger. Twenty takes each were selected showing female and male actors. These 40 takes (edited in random order onto video tape) were presented to 90 judges (about half female and half male; about half younger pupils and about half older ones), whose task it was to judge the emotion(s) expressed on nine 5-point-emotion scales. Results indicated that female actors are somewhat better (though not statistically significant) in communicating emotion via facial expression without context than male actors are. Furthermore, significant interactions between portrayed emotion and gender of actors were found: While recognition rate for joy is very high and identical for both genders, female actors seem to be superior in communicating fear and sadness via facial expression, while male actors are more successful in communicating anger. A display rule approach seems to be appropriate for the interpretation of these results, indicating that gender-specific attempts to control/inhibit certain emotions do not only exist in real life, but also in movies.The research reported here was supported by a grant of the Deutsche Forschungsgemeinschaft (WA 519/2-2). I thank Uwe Balser and Tina Mertesacker for their help in selecting the stimuli, preparing the judgment tapes, recruiting subjects and conducting the study.     

The effect of comparisons on detecting deceit

The present study examined the impact of viewing condition on accuracy in detecting deception. In Experiment 1, observers saw: 1) a single interview for each subject and then judged whether it was honest or deceptive; or 2) two interviews for each subject, and then judged which one was deceptive. All observers were given the full audiovisual record; they were able to see the face and the entire body and to hear the speech as it was spoken. As predicted, detection accuracy when two interviews were available for comparison was significantly higher than accuracy for a single interview. In both cases, however, mean detection accuracy was not significantly different from chance. In Experiment 2, the impact of viewing order of the two interviews (honest first vs. deception first) was assessed. When honest interviews were shown first, judges' accuracy was significantly greater than when deceptive interviews were shown first, and it was also significantly better than chance. Heuristics such as anchoring and representativeness may account for this phenomenon. Reasons for observers' inability to detect deception in this, and other studies, are discussed.Paul Ekman's work is also supported by a Research Scientist Award from the National Institute of Mental Health (MH 06092) and a previous grant from NIMH (MH11976).     

Centrality and power revisited: actor success in group decision making

For many years, network analysts viewed positional centrality as a source of social power. More recently, laboratory studies of exchange networks have called the centrality–power link into question: under zero-sum exchange conditions, the ability of certain actors to directly exploit others has been found to account for power independent of actors' centrality. But most observers believe that in non-zero-sum communication networks, centrality should positively affect power. In this study we examine the effect of centrality on power in a communication network involving group voting on political issues. Using a model in which actors' votes are determined by the strength of their initial positions and the social pressures to which they are subjected, we conduct computer simulations to examine the extent to which actors in various network positions achieve favorable political outcomes. Our findings indicate that the link between centrality and power is highly contingent on the structure of the network. In networks with a central actor and an odd number of subgroups, central actors fail to dominate. In fact, in these networks, when peripheral actors are able to directly influence one another, the central actor becomes the least powerful in the network. In networks with a central actor and an even number of subgroups, however, the central actor dominates even in situations with connected peripherals. The highly contingent effect of centrality on power accords with the findings of exchange theorists who have studied power under zero-sum conditions. This raises questions about the nature of the distinction between communication and exchange networks.     

Walking Ability is Associated with Social Communication Skills in Infants at High Risk for Autism Spectrum Disorder

Achievement of early motor milestones in infancy affords new opportunities for social interaction and communication. Research has shown that both motor and social deficits are observed in infants who later develop autism spectrum disorder (ASD). This study examined associations between motor and Social communication skills in 12‐month‐old infant siblings of children with ASD who are at heightened risk for developmental delays (N = 86) and low‐risk, typically developing infants (N = 113). Infants were classified into one of three groups based on their walking ability: walkers (walks independently), standers (stands independently), or prewalkers (does not yet stand or walk independently). Social communication and cognitive skills were assessed with two standardized assessments (Communication and Symbolic Behaviors Scales [CSBS] and Mullen Scales of Early Learning) and compared across the three walking groups. Results demonstrated that high‐risk walkers showed superior Social communication skills, but commensurate cognitive skills, compared to high‐risk prewalkers. In contrast, Social communication and cognitive skills were largely comparable for low‐risk infants, regardless of walking status. Findings suggest that for high‐risk infants, who are already vulnerable to developmental delays and ASD, independent walking may facilitate the emergence of Social communication abilities. Pivotal motor milestones may serve as useful indicators of Social communication delays and targets for intervention.     

Effects of 10-week walking and walking with home-based resistance training on muscle quality,muscle size,and physical functional tests in healthy older individuals

Background

Older individuals have been shown to present muscle atrophy in conjunction with increased fat fraction in some muscles. The proportion of fat and connective tissue within the skeletal muscle can be estimated from axial B-mode ultrasound images using echo intensity (EI). EI was used to calculate the index of muscle quality. Walking, home-based weight-bearing resistance training, and its combinations are considered simple, easy, and practical exercise interventions for older adults. The purpose of this study was to quantify the effects of walking and walking with home-based resistance training on muscle quality of older individuals.

Methods

Thirty-one participants performed walking training only (W-group; 72?±?5?years) and 33 participants performed walking and home-based resistance training (WR-group; 73?±?6?years). This study was a non-randomized controlled trial with no control group. All participants were instructed to walk 2 or 3 sets per week for 10?weeks (one set: 30-min continuous walking). In addition, the WR-group performed home-based weight-bearing resistance training. EI was measured as a muscle quality index using axial B-mode ultrasound images of the rectus femoris and vastus lateralis of the mid-thigh. We further averaged these parameters to obtain the EI of the quadriceps femoris (QF). Participants further performed five functional tests: sit-ups, supine up, sit-to-stand, 5-m maximal walk, and 6-min walk.

Results

QF EI was significantly decreased in both groups after training (W-group 69.9?±?7.4?a.u. to 61.7?±?7.0?a.u., WR-group 64.0?±?9.5?a.u. to 51.1?±?10.0?a.u.; P?<?0.05), suggesting improved muscle quality. QF EI was further decreased in the WR-group compared with the W-group. The sit-up test in both groups and the sit-to-stand and 5-m maximal walk tests in the W-group were significantly improved after training.

Conclusion

These results suggest that training-induced stimulation is associated with a decrease in EI in some thigh regions. Furthermore, the addition of home-based resistance training to walking would be effective for a greater reduction of EI.

     

Experienced crawlers avoid real and water drop-offs,even when they are walking

Crawling experience was recently linked to crawling and walking infants’ avoidance of falling on real and water cliffs, whereas walking experience had no effect on walkers’ avoidance behavior (Burnay et al., 2021). In the current study, the behavior of 25 infants was analyzed on the Real Cliff/Water Cliff apparatus using a longitudinal study design. Infants were tested as experienced crawlers (M_crawling = 2.93 months, SD = 1.07), novice walkers (M_walking = 0.68 months, SD = 0.29), and experienced walkers (M_walking = 4.90 months, SD = 0.92). Infants avoided falling on both cliffs when tested as experienced crawlers and their behavior was not different when tested as novice or experienced walkers. These findings confirmed the effect of crawling experience on crawling and walking infants’ avoidance of falls from heights and into water and the transfer of perceptual learning from crawling to walking postures.     

Person perception effects of computer-simulated male and female head movement

Sixteen male and sixteen female student observers were shown computer-simulated sequences of male and female head movement based on time-series protocols of real-life interactions and were asked to rate their impressions of the computer actors on the screen. While in one experimental condition the sex of the movement origin matched the sex of the computer model, the movement protocols were exchanged in the second condition. Impression formation effects were analyzed in a three-factorial ANOVA design, with the independent factors (1) sex of observer, (2) sex of computer model, and (3) sex of movement origin. The results point to strong main effects of the sex of movement origin. Male behavior was perceived as more active and mobile, whether displayed by a male or female computer model. However, three-way interactions indicate that male and female head movement was evaluated differently by male and female observers depending on the sex of the computer model. Counterintuitively, female computer models scored higher in male observers' judgments of friendliness and attractiveness when displaying male head movement.     

Tackling Diving: The Perception of Deceptive Intentions in Association Football (Soccer)

The three studies reported examine judgment about the attempts of footballers (soccer players) to deceptively exaggerate the effect of a tackle. Study one reveals that non-professional participants agree about which players were attempting deception and those that were not; there was also agreement about the tackles in which the intentions were ambiguous. Study two demonstrates that the intentions of tackled players match the judgment of their intentions by observers. Study three provides a taxonomy of behaviors that are associated with deceptive and non deceptive intentions. We conclude that deceptive intentions in this context are to a degree manifest in behavior and are observable.     

COLLECTIVE MOBILIZATION AND IDENTITY FROM THE UNDERGROUND: The Deployment of "Oppositional Capital" in the Harm Reduction Movement

Within social movement literature, the concept of collective identity is used to discuss the process through which political activists create in-group cohesion and distinguish themselves from society at large. Newer approaches to collective identity focus on the negotiation of boundaries as social movement agents interact with social structural forces. However, in their adoption of a perspective that holds identity as a process, these social movement studies neglect the more tangible cultural elements that actors manipulate when they express collective identity. This research project adopts a subcultural perspective in the Birmingham tradition to address the question of how social movement actors reapporpriate symbolic expressions of identity and what meaning systems they draw from that enable them to redefine "stigmatization" as "status" This article offers the concept of "oppositional capital" as a general framework for analyzing the symbolic work that social movement actors perform in their expressions of collective identity. For the purposes of analysis, the primary elements of oppositional symbolic expressions are divided into the four categories of distinction, antagonism, political activism, and popular cultural aesthetics. This article applies the concept of oppositional capital to representations of collective identity of a radical branch of political activism within the social movement of harm reduction. Specifically, it analyzes the zine, Junkphood to describe how actors within this social movement cohort are able to present their collective identity as part of an alternative status system by drawing from an economy of signs that are generally recognized as oppositional.     

Who runs the mill? The distribution of power in Swedish social service agencies

The aim of the article is to describe how significant actors in Swedish social service agencies perceive their own and other groups' influence over central areas of their agencies, and also to investigate the correspondence between these actors' perceptions of influence and what is said about the distribution of influence in the legislation and in the literature on social service organisations. The investigation is based on a questionnaire sent to politicians, managers and social workers in Swedish municipalities.

The analysis shows a concordance between the actors' own perceptions of their influence, and the ‘real’ distribution of influence, as perceived by the same actor groups. The general picture is that the politicians feel they have a strong influence on policy, delegation and, partly, also on organisational issues, but it is noteworthy that the top managers feel they have a stronger influence over all these areas. Social workers' influence is limited to the choice of working methods and operational procedures. The results indicate that some core elements of the New Public Management (NPM) model of governance exist in Swedish municipalities and seem to be generally accepted among significant actors. However, the results raise important questions about who should be held accountable for neglect and mismanagement and for failure in implementation of reforms in the social services.     

Association between handgrip strength,walking, age-related illnesses and cognitive status in a sample of Portuguese centenarians

Background

Centenarians are a growing population in Europe and present significant variability in motor and cognitive functions. The aim of our study was to characterize health status, as well as cognitive and motor functions in a group of Portuguese centenarians. In addition, our study also aimed at analyzing the relationship between cognitive functions and the burden of diseases affecting the elderly.

Methods

Fifty-two centenarians were evaluated using the Mini-Mental State Examination, short version. Walking-related parameters (velocity and time spent in the 3 m walk test), grip strength and number of age-related illnesses were also measured. The relationship between cognitive scores and time spent in the three metre walk test, velocity, grip strength and number of diseases was analysed.

Results

Cognitive scores showed a positive correlation with both handgrip strength and time spent in the three metre walk. In contrast, no association was found between cognitive scores and the presence/absence of disease, walking velocity or number of diseases present.

Conclusions

These results suggest that in centenarians, cognitive functions may be related with motor functions.

     

Creating the collective: social media,the Occupy Movement and its constitution as a collective actor

This paper examines the process through which Occupy activists came to constitute themselves as a collective actor and the role of social media in this process. The theoretical framework combines Melucci's (1996 Melucci, A. (1996). Challenging codes: Collective action in the information age. Cambridge: Cambridge University Press.[Crossref] , [Google Scholar]) theory of collective identity with insights from the field of organizational communication and particularly from the ‘CCO’ strand – short for ‘Communication is Constitutive of Organizing’. This allows us to conceptualize collective identity as an open-ended and dynamic process that is constructed in conversations and codified in texts. Based on interviews with Occupy activists in New York, London and other cities, I then discuss the communication processes through which the movement was drawing the boundaries with its environment, creating codes and foundational documents, as well as speaking in a collective voice. The findings show that social media tended to blur the boundaries between the inside and the outside of the movement in a way that suited its values of inclusiveness and direct participation. Social media users could also follow remotely the meetings of the general assembly where the foundational documents were ratified, but their voices were not included in the process. The presence of the movement on social media also led to conflicts and negotiations around Occupy's collective voice as constructed on these platforms. Thus, viewing the movement as a phenomenon emerging in communication allows us an insight into the efforts of Occupy activists to create a collective that was both inclusive of the 99% and a distinctive actor with its own identity.     

The significance of uprightness: parents’ reflections on children’s responses to a hands-free walker for children

The benefits and drawbacks of facilitating independent walking in children with physical mobility impairments, such as cerebral palsy, remain to be determined. This knowledge gap creates decision dilemmas about which mobility practices parents and children should adopt and rehabilitation professionals should foster. These dilemmas are reflected in continuing debates about allocation of time, effort and resources to optimize walking versus encouraging use of manual or powered wheelchairs. Recent studies have reported only modest measurable walking progress for severely disabled children using hands-free walkers. Despite these seemingly disappointing results, parents remained highly motivated to encourage their children to use these walking devices and appraised them very positively. In the present paper, we suggest that parents’ symbolic value of their children assuming upright comportment may explain why they perceive hands-free walkers positively and why they are so motivated to devote much time and effort to improving independent, walking-based mobility of their children.     

Locomotion development and infants' object interaction in a day-care environment

This longitudinal study examined the relationship between the development of locomotion and infants' interaction with others involving objects. Observations took place in a multi-person situation—a day-care class—for one-year-old infants for 1 year. The study participants were 13 infants and 7 caregivers (all Japanese). Frequencies of infants’ manual contact with objects and moving before contact with them did not differ according to locomotion developmental level. However, infants who began walking engaged in more social interactions than those who were cruising or crawling. Throughout all locomotor developmental periods, social interactions increased in frequency when more caregivers were present. As infants began to walk, they moved more prior to social interactions, had more frequent bidirectional and triadic social interactions, and moved and interacted more often with others during a single object episode. These results suggest that crawlers' engagement with objects is relatively object-oriented, while for walkers, locomotion seems to be driven by social stimuli. Infants who have begun to walk moved among caregivers and peers in a multi-person environment and developed more elaborated social interactions through objects.     

Perceptions of the Neighborhood Environment Associated With Walking at Recommended Intensity and Volume Levels in Recreational Senior Walkers

This study examined the relationship of perceived neighborhood environment factors with recommended volume and intensity of walking in recreational senior walkers. A sample of 85 seniors used an accelerometer and completed the ALPHA questionnaire. Binomial logistic regressions were conducted to detect associations. Perceptions about traffic safety (odds ratio [OR] = 4.395; 95% confidence interval [CI] = 1.024; 18.866) and pleasant environment (OR = 8.718; 95% CI = 1.803; 42.149) were positively related with the achievement of 10,000 steps per day, in older women. The perception of nearby parks was positively associated with the compliance with peak 30-minutes cadence above 100, in older men (OR = 14.353; CI 95% = 1.321; 15.591). No more significant associations were found between perceptions of the neighborhood environment and walking at recommended intensity and volume levels. These results indicated that community initiatives that encourage traffic safety, pleasant environment, and parks may be a promising direction to promote walking at recommended volume and intensity in senior walkers.