Toy-oriented changes during early arm movements IV: shoulder-elbow coordination

Our recent work on the initial emergence of reaching identified a mosaic of developmental changes and consistencies within the hand and joint kinematics of arm movements across the pre-reaching period. The purpose of this study was to test hypotheses regarding the coordination of hand and joint kinematics over this same pre-reaching period. Principal component analysis (PCA) was conducted on hand, shoulder, and elbow kinematic data from 15 full-term infants observed biweekly from 8 weeks of age through the week of reach onset. Separate PCAs were calculated for spatial variables and for velocity variables in trials with a toy and without a toy. From the PCA results, we constructed ‘variance profiles’ to reflect the coordinative structure of the hand, shoulder, and elbow. By coordinative structure is meant here the relative contribution of each joint to the factors revealed by the PCA. Shifts in these profiles, which reflected coordination changes, were compared across the hand and joints within each pre-reaching phase (Early, Mid, Late) as well as across phases and trial conditions (no-toy and toy). Results identified both surprising consistencies and important developmental changes in coordination. First, over development, spatial coordination changed in different ways for the shoulder and elbow. Between the Early and Late phases, spatial coordination at the shoulder showed more adult-like coordination during both spontaneous movements and movements with a toy present. In contrast, elbow spatial coordination became more adult-like only during movements with a toy and less adult-like during spontaneous movements. Second, over development, velocity coordination became more adult-like at both joints in movements with and without a toy present. We propose that the features of coordination that changed over development suggest explanations for the differential roles and developmental trajectories of the control of arm movements between the shoulder and elbow. We propose that features that remained consistent over development suggest the presence of developmentally important constraints inherent in arm biomechanics, which may simplify arm control for reaching. Taken together, these findings highlight the critical role of spontaneous arm movements in the emergence of purposeful reaching.     

Toy-oriented changes in early arm movements II--joint kinematics

Our recent work suggests that infants begin to change their hand and joint kinematics in the presence of a toy months before the onset of purposeful reaching. Moreover, these 'toy-oriented' changes in hand kinematics cluster into Early, Mid and Late phases. The purpose of the present study was to test hypotheses regarding toy-oriented changes in joint kinematics in the same infants. METHODS: Thirteen infants were observed every other week from 8 weeks up to the first week of reaching around 20 weeks. At each session, a high-speed motion analysis system recorded infants' arm movements with and without a toy present. RESULTS: During the Early phase, infants scaled down their movements. In contrast, during the Mid phase infants scaled up their movements and did not change the relationship between the shoulder and elbow for speed and smoothness-related variables. In addition, infants showed toy-oriented changes such as increase in shoulder flexion and adduction. In the Late phase, infants continued to produce toy-oriented changes in shoulder orientation, and increased shoulder excursion and speed relative to the elbow. Thus, the toy-oriented changes in hand kinematics in the Mid and Late phases [Bhat, A. N., & Galloway, J. C. (2006). Toy-oriented changes in early arm movements of young infants: Hand kinematics. Infant Behavior and Development, 29(3), 358-372] more closely followed changes in shoulder kinematics. Lastly, results are discussed in terms of shoulder-elbow dissociations, speed-amplitude relationships, and the key role of spontaneous movements in the development of reaching.     

Report to the World Federation for Mental Health Editor's Note

The effects of written, cognitive pretraining on self-reported self-disclosure and cohesion in group psychotherapy were studied. Subjects were members of time-limited psychotherapy groups that focused on incest-related issues. The experimental groups were given written cognitive pretraining designed to increase self-reported self-disclosure and cohesion. The control groups received general group information. Subjects in the pretrained groups reported higher levels of self-perceived self-disclosure than the control groups after sessions 4 (p = .003) and 8 (p = .003). Self-reported self-disclosure did not increase over time for pretrained or nonpretrained subjects. Cohesion did not differ across groups, but increased over time for experimental subjects (p = .008), and not for control subjects.     

Comparison of grasping movements made by healthy subjects in a 3-dimensional immersive virtual versus physical environment

Virtual reality (VR) technology is being used with increasing frequency as a training medium for motor rehabilitation. However, before addressing training effectiveness in virtual environments (VEs), it is necessary to identify if movements made in such environments are kinematically similar to those made in physical environments (PEs) and the effect of provision of haptic feedback on these movement patterns. These questions are important since reach-to-grasp movements may be inaccurate when visual or haptic feedback is altered or absent. Our goal was to compare kinematics of reaching and grasping movements to three objects performed in an immersive three-dimensional (3D) VE with haptic feedback (cyberglove/grasp system) viewed through a head-mounted display to those made in an equivalent physical environment (PE). We also compared movements in PE made with and without wearing the cyberglove/grasp haptic feedback system. Ten healthy subjects (8 women, 62.1 ± 8.8 years) reached and grasped objects requiring 3 different grasp types (can, diameter 65.6 mm, cylindrical grasp; screwdriver, diameter 31.6 mm, power grasp; pen, diameter 7.5 mm, precision grasp) in PE and visually similar virtual objects in VE. Temporal and spatial arm and trunk kinematics were analyzed. Movements were slower and grip apertures were wider when wearing the glove in both the PE and the VE compared to movements made in the PE without the glove. When wearing the glove, subjects used similar reaching trajectories in both environments, preserved the coordination between reaching and grasping and scaled grip aperture to object size for the larger object (cylindrical grasp). However, in VE compared to PE, movements were slower and had longer deceleration times, elbow extension was greater when reaching to the smallest object and apertures were wider for the power and precision grip tasks. Overall, the differences in spatial and temporal kinematics of movements between environments were greater than those due only to wearing the cyberglove/grasp system. Differences in movement kinematics due to the viewing environment were likely due to a lack of prior experience with the virtual environment, an uncertainty of object location and the restricted field-of-view when wearing the head-mounted display. The results can be used to inform the design and disposition of objects within 3D VEs for the study of the control of prehension and for upper limb rehabilitation.     

The Role of Optimism/Pessimism in HRQOL in Chronic Hepatitis C Patients

One hundred and twenty three outpatients with compensated chronic hepatitis C (CHC) completed the SF-36, BSI, and questions regarding the expected impact of CHC on their health. Respondents were categorized as optimists (N = 17, 13.8%), realists (N = 98, 79.6%), and pessimists (N = 8, 6.5%). Pessimism was associated with lower scores on nearly all SF-36 subscales (p < .001 –.03) and higher scores on 6 BSI subscales indicative of greater emotional distress (p < .05). Pessimism was not associated with demographics, liver disease severity, substance abuse, or comorbid medical conditions. However, pessimism was associated with the presence of a psychiatric comorbidity and self-reported health status (p < .05). We conclude that optimism/pessimism may be an important determinant of QOL and emotional status in CHC patients and that additional studies of cognitive predispositions and coping skills in CHC patients are warranted.     

A randomized controlled pilot study evaluating Worry Less,Live More: The Mindful Way Through Anxiety Workbook

ABSTRACT

Effective interventions for generalized anxiety exist, but barriers to treatment prevent their broad dissemination. Commercially available self-help materials may help bridge this gap, but few have been empirically evaluated. This study compared self-reported change in generalized anxiety symptomology and associated problems between community members with excessive worry who were randomly assigned to receive the Worry Less, Live More: The Mindful Way through Anxiety Workbook (n = 35) and those in a delayed condition (n = 29). Participants in the workbook condition reported significantly greater reductions between baseline and 11-week follow-up in self-reported worry (η ² =.15), general anxiety/tension (η ² =.13), and anxiety (η ² =.24) than those in the delayed condition, although no statistically significant differences across condition on changes in depression, functional impairment or acceptance were detected. This pilot study provides support for continued research examining the efficacy of acceptance-based behavioral therapy delivered in a self-help format.     

Gendered adversity and mental health of adolescents orphaned by AIDS in a rural South African community: An exploratory study

This study explored gender differences in adversity and mental health among South African adolescents orphaned by AIDS. Adolescents (N = 121; females = 45.5%; mean age 14.14 years, SD = 2.09) self-reported their childhood adversities and probable mental ill health on the Child Trauma and General Health Questionnaire. Results revealed that female participants orphaned by AIDS were significantly more likely to report childhood adversity at total score level as compared to male participants. However, both male and female participants reported comparable scores on subscales of childhood adversity (emotional abuse, physical abuse, sexual abuse, and physical neglect). Moreover, female participants displayed higher composite mental ill health and all its subscales except for social dysfunction. Our findings suggest that gender-sensitive programmes and policies to address the effect of childhood adversity and mental ill health among adolescents orphaned by AIDS, are urgently needed.     

Assessing the Rising Emphasis on Muscularity for Women: Psychometric Properties of the Brazilian Version of the Female Muscularity Scale

The female appearance ideal has undergone considerable changes in recent years, resulting in increases in drive for muscularity among Brazilian women. The Female Muscularity Scale (FMS) was developed to assess muscularity concerns among U.S. women and was shown to be a promising measure of muscularity-related attitudes and behaviors. The present studies aimed to translate and culturally adapt the FMS to Brazilian Portuguese and to explore its factorial structure among Brazilian women (Study 1: n = 202, M_age = 24.40, SD = 5.03) and to confirm the factor structure as well as evaluate convergent and divergent validity and reliability of the FMS for young adult Brazilian women (Study 2: n = 382, M_age = 22.71, SD = 4.32). Exploratory factor analysis revealed a two-factor structure (Attitudes and Behaviors subscales), each comprising five items. Confirmatory factor analysis upheld the original two-factor structure with good fit indices. The full scale and its subscales presented convergent validity through associations with measures of body dissatisfaction, drive for muscularity, body-ideal internalization, body checking and avoidance behaviors, disordered eating, and exercise engagement. Evidence of divergent validity was obtained in relation to self-esteem and depressive symptoms. The Brazilian version of FMS also presented adequate values for internal consistency and 2-week test-retest reliability. These findings support the Brazilian version of the FMS as a useful tool for investigating muscularity-related aspects of body image and body change behaviors that are increasingly a source of concern for women.

     

Situation Awareness and Transformational Leadership in Senior Military Leaders: An Exploratory Study

This study explored the relationship between leadership style and operational readiness in a sample of senior Norwegian military officers (N = 43), who participated in a 1-week joint staff exercise. Leadership style was measured by the Multifactor Leadership Questionnaire (MLQ-45), and indicators of operational readiness included situation awareness and interpersonal influence. Transformational leadership emerged as a predictor of situation awareness (R² = .33) and interpersonal influence (R² = .25), with intellectual stimulation as the only significant predictor among the facet subscales. Some possible theoretical and methodological implications for future research are also pointed out.     

Parenting Intervention to Reduce Attention and Behavior Difficulties in Preschoolers: A CUIDAR Evaluation Study

In this study, we evaluated CUIDAR, a program that provides community-based 10-week parent training to reduce attention and behavior problems in preschool children. We recruited 154 predominantly low-income and Latino preschoolers and their parents to participate in this evaluation study. We collected data prior to and immediately following intervention and one year later. At the time of follow-up, we also recruited 15 parents who had initially enrolled, but never participated in the program to serve as a comparison group for a limited set of analyses. From pre to post intervention, we observed significant, positive changes in eight out of ten measured parenting behaviors. From pre intervention to follow-up, improvements in the use of transitional statements and planning ahead were significant. Children’s SDQ Total Difficulties scores significantly decreased from pre to post intervention (d = .36), and we observed significant, positive changes in all SDQ subscales. From pre intervention to follow-up, children’s SDQ Total Difficulties scores significantly decreased (d = .71) and all SDQ subscales reflected significant, positive changes. We observed no significant differences in reported barriers to participation between parents who participated in the program and those who enrolled, but never participated. Intervention gains were moderated by several factors, including history of out-of-home care and family structure. Our results should be interpreted cautiously because not all analyses included a comparison group, and a randomized trial of CUIDAR effectiveness is still needed.     

The Beliefs About Medication Scale: Development, Reliability, and Validity

The purpose of the study was to develop and evaluate a psychometrically sound health belief measure, the Beliefs About Medication Scale (BAMS) that can be used with adolescent chronic illness populations whose prescribed treatment includes oral medication. One hundred and thirty-three adolescents (age 11–18 years) with asthma (n = 60), HIV (n = 31), or inflammatory bowel disease (n = 42) completed the BAMS and, along with their parent, a self-report medication interview. A confirmatory factor analysis supported the hypothesized subscales of Perceived Threat, Positive Outcome Expectancy, Negative Outcome Expectancy, and Intent to Adhere to treatment. The subscales evidenced good internal consistency and 3-week test-retest reliability. Univariate and multivariate analyses demonstrated that the health belief constructs accounted for 22% of the variance in medication adherence beyond demographic and illness characteristics. The study provides preliminary evidence of the reliability and validity of a theoretically based measure of health beliefs for adolescents. The BAMS may be a useful tool to evaluate the psychological barriers to adherence that place teenagers at risk for nonadherence.     

Is God's call more than audible? A preliminary exploration using a two‐dimensional model of theistic/spiritual beliefs and experiences

Among spiritual individuals, auditory hallucinations (AHs) are often accompanied by positive affectivity (PA) suggesting that such coincidental affective valence might gainfully demark spiritual from comparable non‐spiritual aberrant perceptions. Yet nearly all of the relevant past religiosity/spirituality research has been limited to AHs and/or known groups (Evangelicals, epilepsy patients, etc.). Using a community sample (N = 485), this article explores whether unusual perceptual experiences (UEs) more generally (not simply AHs) together with PA predict participants' self‐reported spirituality. Specifically, a dual marker hypothesis developed from affect attribution theory—in which UE, PA, and their interaction predict spirituality in a non‐additive positive fashion—is proposed and confirmed (even after controlling for socio‐demographics). The estimators reveal that spirituality is disproportionately elevated for high scorers on both predictors. These results are consistent with previous known‐group studies and support recent speculation that the affective–cognitive interpretation of perceptual aberrations might be a key feature of spirituality and one that potentially demarks it from psychosis. Moreover, the correlation between spirituality and PA varies depending upon one's UE level; a result not anticipated by the incumbent positive psychological theory of spirituality.     

Changes in Movement Symmetry Associated With Strengthening and Fatigue of Agonist and Antagonist Muscles

The hypothesis that strengthening or fatiguing procedures applied on active muscles can affect the symmetry of rapid, discrete movements was tested. Subjects (N = 12) performed rapid, consecutive elbow flexions and extensions between 2 targets before and after (a) applying a strength training program, (b) fatiguing elbow flexors, and (c) fatiguing elbow extensors. The results demonstrated that an increase in strength of elbow extensors caused by applied strength training is associated with an increase in the symmetry ratio (i.e., acceleration time divided by deceleration time) of elbow flexion movements. The symmetry ratio also increased and decreased in movements when agonists and antagonists were fatigued, respectively. Because the strength training and fatiguing procedures are both known to affect muscle force, the data are interpreted as changes in muscles' ability to exert the force while acting as agonists or antagonists. Namely, muscles need equal impulses of force (torque multiplied by time) to accelerate and, thereafter, to decelerate the limb while performing a rapid, discrete movement. The symmetry ratio may therefore be changed so that more time will be provided for muscles that become relatively weaker (compared with their antagonists) because a strengthening or fatiguing procedure has been applied, whereas a shorter time period should be sufficient for action of their stronger antagonists. Although, in the literature, the studied phenomenon has been discussed as a predominantly motor control phenomenon, the present data suggest that the movement symmetry could also be related to agonists' and antagonists' ability to exert force, particularly while performing rapid, discrete movements.     

Using Personality Testing for Personnel Selection: Faking and Test-Taking Inductions

This research assessed whether warning subjects that faked responses could be detected would reduce the amount of faking that might occur when using a personality test for selection of police officers. Also, personality test subscales which best differentiated honest from dissimulated responses were determined. Subjects (N=120) were randomly assigned to a straight-take (that is, respond honestly), fake good, or modified fake good group. Both fake good groups were instructed to respond to the test so as to appear favourably for the job; additionally, the modified fake good group was warned that faking could be detected and could reduce hiring chances. Multivariate analyses revealed significant differences on the Denial and Deviation subscales between the three conditions (p <0.01). The pattern of differences suggested that the threat of faking detection reduced faking. Potential application of these findings in personnel selection was discussed.     

Toward a reliable and valid measure of institutional mission and values perception: the DePaul values inventory

Across three studies, the development of a reliable and valid measure of perceptions by students of an urban, private, faith‐based teaching university's mission and values was assessed. Study 1 presented scale construction and reliability of the DePaul Values Inventory (DeVI) with undergraduates (n = 111), yielding a final 22‐item rating scale with four subscales. Study 2 supported the psychometric structure of the DeVI through a confirmatory factor analysis (n = 292). Study 3 assessed the DeVI's discriminant validity by correlating scores with social desirability and personal values surveys (n = 106). Overall, the DeVI was determined to be a reliable and valid measure of students' perceptions of an institution's mission and values, regardless of student gender, and independent of one's personal values even controlling for social approval tendencies. Future studies should examine the DeVI and its applicability for other similar institutions of higher learning.     

Clinical Effectiveness of an Intensive Outpatient Program for Integrated Treatment of Posttraumatic Stress Disorder and Mild Traumatic Brain Injury

Mild traumatic brain injury (mTBI) and posttraumatic stress disorder (PTSD) are pervasive consequences of the post-9/11 conflicts. Treatment of PTSD and mTBI has historically occurred separately and sequentially, which does not reflect the overlapping etiology of symptoms and may attenuate or delay recovery. This paper describes an integrated 2-week treatment program using prolonged exposure and cognitive symptom management and rehabilitation therapy to comprehensively treat PTSD and cognitive complaints attributed to mTBI, regardless of etiology. To minimize potential iatrogenic effects of treating presumed mTBI-related symptoms, a central focus of the program was to instill expectations of full recovery. Thirty patients with full or subclinical PTSD and self-reported TBI history completed the PTSD+TBI treatment program. Results indicated that self-reported PTSD, depression, and neurobehavioral symptoms significantly decreased following treatment, while satisfaction with participation in social roles increased. These preliminary effectiveness data indicate that PTSD complicated by mTBI history can be effectively treated within a 2-week intensive outpatient program.     

Visual Information and Object Size in the Control of Reaching

The role of vision in the control of reaching and grasping was investigated by varying the available visual information. Adults (N = 7) reached in conditions that had full visual information, visual information about the target object but not the hand or surrounding environment, and no visual information. Four different object diameters were used. The results indicated that as visual information and object size decreased, subjects used longer movement times, had slower speeds, and more asymmetrical hand-speed profiles. Subjects matched grasp aperture to object diameter, but overcompensated with larger grasp apertures when visual information was reduced. Subjects also qualitatively differed in reach kinematics when challenged with reduced visual information or smaller object size. These results emphasize the importance of vision of the target in reaching and show that subjects do not simply scale a command template with task difficulty.     

Toy-oriented changes in hand and joint kinematics during the emergence of purposeful reaching

Infants first consistently reach for objects between 3 and 5 months of age. In the months before reaching, infants produce a variety of arm movements. The relationship between these early arm movements and the emergence of purposeful reaching is still unclear. The purpose of the present study was to determine how groups of non-reaching, nearly reaching, and newly reaching infants changed the kinematics of their spontaneous arm movements in the presence of a toy. Five infants in each of these groups were observed with a high-speed motion capture system during trials with and without a toy present. Kinematic analyses examined 3D hand, shoulder, and elbow motions. Our results suggest that with a toy present, non-reachers altered their movement quantity whereas near- and new-reachers altered their movement quality through spatio-temporal dissociation and reorientation of the arm. When comparing the changes across groups we observed three preliminary patterns of toy-oriented changes. Our results join other studies to strengthen the relationship between early arm movements and purposeful reaching. Future longitudinal studies are now required to begin to fully understand the complex process by which infants adapt their early arm movements for purposeful behaviors.     

The roles of thought suppression and metacognitive beliefs in proneness to auditory verbal hallucinations in a non-clinical sample

In a non-clinical sample (N = 751), we investigated relations among two subscales (self-reported intrusiveness of unwanted thoughts and thought suppression) of the White Bear Suppression Inventory (WBSI), metacognitive beliefs, and proneness to auditory verbal hallucinations (AVHs). Both subscales of the WBSI were found to be related to AVH-proneness and strongly positively related to metacognitive beliefs about the uncontrollability and danger of thoughts. Regression analyses were used to test models of the relations among AVH-proneness and a range of metacognitive beliefs. When the WBSI subscale relating to the self-reported intrusiveness of unwanted thoughts was controlled for, the metacognitive style that was the strongest predictor of AVH-proneness was cognitive self-consciousness. Cognitive confidence and beliefs about the uncontrollability of thoughts were also significant predictors of AVH-proneness. These findings are used to revise existing models of the relations between metacognitive beliefs and AVHs. Implications for the management of AVHs are discussed.     

Perceptions of the Supervisory Relationship: Recovering and Nonrecovering Substance Abuse Counselors

The unique set of dynamics found in the substance abuse field (i.e., recovering and nonrecovering counselors and supervisors) calls for a separate examination of the supervisory relationship within this context. The authors examined differences in counselors' perceptions of the supervisory relationship based on counselor and supervisor recovery status, and the match or mismatch of counselor and supervisor recovery status. Substance abuse counselors (N = 547) working in a statewide public mental health system located in the Southeast rated satisfaction with supervision and reported perceptions of various dimensions of the supervisory relationship. Results of the 2 (counselor recovery status: nonrecovering and recovering) × 2 (supervisor recovery status: nonrecovering and recovering) multivariate analysis of variance indicated no significant differences in ratings of satisfaction or relationship dimensions based on either the counselors' or supervisors' recovery status. A significant interaction effect for counselor and supervisor recovery status (i.e., match or mismatch of recovery status) was found for all satisfaction and relationship measures.