Effects of plantar cutaneo-muscular and tendon vibration on posture and balance during quiet and perturbed stance

Modulation of lower limb somatosensory information by tendon or plantar vibration produces directionally specific, vibration-induced falling reactions that depend on the tendon or the region of the sole that is vibrated. This study characterized the effects of different patterns of plantar cutaneo-muscular vibration and bilateral Achilles tendon vibration (ATV) on the postural strategies observed during quiet and perturbed stance. Twelve healthy young participants stood barefooted, with their vision blocked, on two sets of plantar vibrators placed on two AMTI force plates embedded in a moveable support surface. Two other vibrators were positioned over the Achilles tendons. Participants were randomly exposed to different patterns of plantar cutaneo-muscular and ATV. Tilts of the support surface in the toes-up (TU) and toes-down (TD) directions were given 5-8 s after the beginning of vibration. Body kinematics in 3D and ground reaction forces were recorded. Bilateral ATV applied with or without rearfoot vibration (RFV) during quiet stance resulted in a whole-body backward leaning accompanied by an increase in trunk extension and hip and knee flexion. RFV alone produced a forward whole-body tilt with increased flexion in trunk, hip, and ankle. When stance was perturbed by TU tilts, the center of mass (CoM) and center of pressure (CoP) displacements were larger in the presence of RFV or ATV and associated with increased peak trunk flexion. TD tilts with or without ATV resulted in no significant difference in CoM and CoP displacements, while larger trunk extension and smaller distal angular displacements were observed during ATV. RFV altered the magnitude of the balance reactions, as observed by an increase in CoP displacements and variable response in trunk displacement. Significant interactions between ATV and RFV were obtained for the peak angular excursions for both directions of perturbations, where ATV either enhanced (for TU tilts) or attenuated (for TD tilts) the influence of RFV. Manipulating somatosensory information from the plantar cutaneo-muscular and muscle spindle Ia afferents thus results in altered and widespread postural responses, as shown by profound changes in body kinematics and CoM and CoP displacements. This suggests that the CNS uses plantar cutaneo-muscular and ankle spindle afferent inputs to build an appropriate reference of verticality that influences the control of equilibrium during quiet and perturbed stance.     

The perception of humanness from the movements of synthetic agents

As technology develops, social robots and synthetic avatars might begin to play more of a role in our lives. An influential theory of the perception of synthetic agents states that as they begin to look and move in a more human-like way, they elicit profound discomfort in the observer--an effect known as the Uncanny Valley. Previous attempts to examine the existence of the Uncanny Valley have not adequately manipulated movement parameters that contribute to perceptions of the humanness or eeriness. Here we parametrically manipulated three different kinematic features of two walking avatars and found that, contrary to the Uncanny Valley hypothesis, ratings of the humanness, familiarity, and eeriness of these avatars changed monotonically. Our results indicate that, when a full gradient of motion parameter changes is examined, ratings of synthetic agents by human observers do not show an Uncanny Valley.     

The effect of relationship status on communicating emotions through touch

Research into emotional communication to date has largely focused on facial and vocal expressions. In contrast, recent studies by Hertenstein, Keltner, App, Bulleit, and Jaskolka (2006) and Hertenstein, Holmes, McCullough, and Keltner (2009) exploring nonverbal communication of emotion discovered that people could identify anger, disgust, fear, gratitude, happiness, love, sadness and sympathy from the experience of being touched on either the arm or body by a stranger, without seeing the touch. The study showed that strangers were unable to communicate the self-focused emotions embarrassment, envy and pride, or the universal emotion surprise. Literature relating to touch indicates that the interpretation of a tactile experience is significantly influenced by the relationship between the touchers (Coan, Schaefer, & Davidson, 2006). The present study compared the ability of romantic couples and strangers to communicate emotions solely via touch. Results showed that both strangers and romantic couples were able to communicate universal and prosocial emotions, whereas only romantic couples were able to communicate the self-focused emotions envy and pride.     

Supporting the students most in need: academic self-efficacy and perceived teacher support in relation to within-year academic growth

Academic self-efficacy and perceived teacher support in relation to academic skill growth across one academic year were examined in the study. Participants included 193 5th-grade students. Teachers collected curriculum-based measures (CBM) of reading and math on three occasions as part of routine academic benchmarks, and researchers collected student-reported measures of academic self-efficacy and perceived teacher support in the spring of the same academic year. Results indicated that academic self-efficacy was positively related to fall reading and math CBM scores and that perceived teacher support was unrelated to fall scores or growth across the academic year. Academic self-efficacy and perceived teacher support interacted in relation to math CBM growth such that low levels of perceived teacher support were related to greater growth, particularly for students with high academic self-efficacy. Follow-up analyses indicated that students with the lowest fall CBM scores and smallest growth rates reported higher levels of perceived teacher support, suggesting that teachers support the students most in need.     

Data-based decision making: the impact of data variability, training, and context

The current study examines agreement among individuals with varying expertise in behavior analysis about the length of baseline when data were presented point by point. Participants were asked to respond to baseline data and to indicate when to terminate the baseline phase. When only minimal information was provided about the data set, experts and Board Certified Behavior Analyst participants generated baselines of similar lengths, whereas novices did not. Agreement was similar across participants when variability was low but deteriorated as variability in the data set increased. Participants generated shorter baselines when provided with information regarding the independent or dependent variable. Implications for training and the use of visual inspection are discussed.     

The Moderating Effect of Anxiety on Development in Atypically Developing Toddlers

In typically developing children, researchers have found that anxiety disorders are associated with poorer intellectual abilities (Davis et al. Journal of Psychopathology and Behavioral Assessment 30:43–51, 2008). The aim of the current study was to examine the impact anxiety symptoms had on the developmental quotients of toddlers. A total of 170 toddlers ranging in age from 17 to 37 months were selected for inclusion in this study, all of whom were at risk for or had a developmental delay. Two factors indicative of behavioral symptoms of anxiety from the Baby and Infant Screen for Children with aUtIsm Traits-Part2 were utilized as the independent variables and the total developmental quotient from the Battelle Developmental Inventory, 2nd Edition was utilized for the dependent variable. Examination of results revealed that atypically developing toddlers with symptoms of anxiety had significantly lower developmental quotients when compared to toddlers without any anxiety symptoms. A discussion of the implications and limitations of this study are included.     

Childhood maltreatment, emotional distress, and early adolescent sexual intercourse: multi-informant perspectives on parental monitoring

This prospective investigation used multi-informant models to examine whether parental monitoring moderated associations between child maltreatment and either emotional distress or sexual intercourse. Data included 637 youth in the Longitudinal Studies of Child Abuse and Neglect (LONGSCAN). Child maltreatment was determined by lifetime Child Protective Service records and youth self-report and included sexual, physical, psychological abuse, and neglect (age 12). The moderating variable was youth- and caregiver-reported parental monitoring (age 12). Outcome variables were emotional distress (age 12) and sexual intercourse (age 14). Analyses included multi- and individual-informant models, adjusting for age, ethnicity/race, family income, and study site. Rates of parental monitoring did not differ by gender, but gender-specific analyses found that among girls, but not boys, youth-reported parental monitoring buffered the effect of maltreatment on emotional distress. Subtype analyses found that the buffering effects of monitoring on emotional distress were strongest for sexual and physical abuse and when youth experienced multiple subtypes of maltreatment. Caregiver-reported monitoring was not associated with reduced emotional distress. Youth and caregiver reports of parental monitoring were inversely associated with sexual intercourse, regardless of maltreatment history. Findings suggest that promoting parental monitoring among caregivers, and perceptions of monitoring among youth, may prevent early sexual intercourse regardless of maltreatment history. Promoting parental monitoring among youth with a history of maltreatment, especially girls or those who have experienced sexual or physical abuse or multiple subtypes of abuse, may reduce the likelihood of emotional distress.     

Experiential Activities in Family Therapy: Perceptions of Caregivers and Youth

Novel and creative therapeutic modalities have been developed in an effort to increase motivation in family therapy for adolescents and families. Many of these approaches incorporate experiential activities or “family play”, which provides a supplemental approach to traditional talk therapy. Incorporating experiential activities into family therapy sessions has been shown to increase engagement and enhance participation in therapy. Therefore, to understand how families view experiential activities within family therapy, we interviewed nineteen adolescents (age 12–17) and their parents/caregivers who were receiving family therapy augmented with experiential activities. We asked a series of open-ended questions to understand the families’ experiences concerning how they initially felt about participating in family therapy and their perceptions of the experiential activities. The activities involved experiential interactions and skill-building exercises that elicited active participation from all family members and encouraged further discussions. Topics of these activities focused on problem areas the family had identified, such as anger management, problem-solving, improving communication, substance use, expressing feelings, coping, etc. Results showed that most caregivers and youth found the experiential activities helpful in creating positive family interactions and developing communication skills. Caregivers and adolescents noted that the activities increased their desire to participate in family therapy sessions and they were more motivated to engage in the treatment process. Clinicians using the methods discussed in this intervention should be aware of the study’s limitations. Implications for clinical practice and research are discussed.     

Beyond Original Sin: A Paradigm Shift for the Age of Neuroscience

In this article I explore the implications of Jesus?? location of the kingdom of heaven in the lived experience of the individual and of the findings of neuroscientific research for a paradigm shift in Christian theology, one that moves us beyond the Adamic myth and belief in original sin. Support for a theological paradigm shift based on lived experience is provided by Capps (1993) and for this particular paradigm shift by Pagels (1989) and Ricoeur (2004). I point out that the doctrine of original sin supports and fosters the negativity bias of the brain and inhibits the resculpting of the brain. Drawing on Hanson??s (2009) evidence in support of the brain??s neuroplasticity (i.e., its capacity to change itself) and on Brach??s (2003) critique of the ??trance of unworthiness,?? I make the case for meditative and mindful awareness practices in Christianity and other religious traditions as proven methods for the resculpting of the brain in order that individuals may experience greater joy, contentment, and awareness of the goodness of life and of God??s creation. A longitudinal neuroscientific research study of Roman Catholic nuns (Newberg and Waldman 2009) provides evidence in support of the role of contemplative prayer and meditation in generating the joy and serenity that Jesus?? allusion to the hidden treasure envisions.