Locomotor strategies in response to altered lower limb segmental mechanical properties

The present study sought to use stilt walking as a model to uncover modifications to gait dynamics caused by changes in lower limb anthropometrics. We examined 10 novice and 10 expert stilt walkers, each walking with and without stilts, to determine the specific adaptations brought about by experience. Three-dimensional kinematics and force platform data were used to calculate the intersegmental forces, net joint moments and moment powers at the ankle, knee and hip. Spatio-temporal data were computed to aid the interpretation of these data. Non-dimensional scaling was used to facilitate comparison between stilt- and normal-walking. In general, the stilts induced largely the same alterations in the locomotor patterns of both novices and experts, which did not allow for the conclusion that the experts employed locomotor dynamics that were better suited to the challenges imposed by alterations to limb length, mass and mass moment of inertia induced by the stilts. Nevertheless, the experts exhibited a lesser reduction in dimensionless stride length and velocity and generated larger concentric knee flexor and hip extensor powers, relative to the novices, which may be indicative of enhanced dynamic stability control.     

Pay attention! Attention to the primes increases attitude assessment accuracy

We demonstrate that an oft-used indirect attitude assessment technique—the attitude activation paradigm—accurately assesses attitudes only when participants attend to the prime stimuli during the attitude activation task. Attitude activation attitudes toward obviously valenced words (e.g., torture, liberty) were more sensitive to attitude valence and extremity when participants were required to attend to the prime words than when they attended to a competing stimulus. As a result, we observed a significantly stronger correlation between attitude activation attitudes and a direct, self-report attitude measure when participants attended to the primes than when they ignored them. We conclude that failing to require participants to attend to the primes during the attitude activation task results in a flawed measurement, which could lead researchers to underestimate relations between the attitude activation measure and direct, self-report attitude measures.     

Do Some People Need Autonomy More Than Others? Implicit Dispositions Toward Autonomy Moderate the Effects of Felt Autonomy on Well‐Being

The present studies examined whether implicit or explicit autonomy dispositions moderate the relationship between felt autonomy and well‐being. Study 1 (N = 187 undergraduate students) presents an initial test of the moderator hypothesis by predicting flow experience from the interaction of autonomy need satisfaction and autonomy dispositions. Study 2 (N = 127 physically inactive persons) used vignettes involving an autonomy (un)supportive coach to test a moderated mediation model in which perceived coach autonomy support leads to well‐being through basic need satisfaction. Again, the effects of need satisfaction on well‐being were hypothesized to be moderated by an implicit autonomy disposition. Study 1 showed that individuals with a strong implicit autonomy (but not power or achievement) motive disposition derived more flow experience from felt autonomy than individuals with a weak implicit autonomy disposition. Study 2 revealed that perceived autonomy support from sports coaches, which we experimentally induced with a vignette method, leads to autonomy satisfaction, leading in turn to positive effects on well‐being. This indirect effect held at high and average but not low implicit autonomy disposition. The results indicate that the degree to which people benefit from autonomy need satisfaction depends on their implicit disposition toward autonomy.     

An experience sampling study of the momentary dynamics of moral,autonomous, competent,and related need satisfactions,moral enactments,and psychological thriving

Motivation and Emotion - Do people really have a psychological need to be moral? We present results from an experience sampling study of momentary moral need satisfaction, moral behaviors, and...     

INTRAORGANIZATIONAL EMPLOYEE NAVIGATION AND SOCIALLY DERIVED OUTCOMES: CONCEPTUALIZATION,VALIDATION, AND EFFECTS ON OVERALL PERFORMANCE

Intraorganizational employee navigation (IEN) is conceptualized as a means of better understanding how the organizational actor proactively works across their firm's internal environment in the execution of their jobs. Navigation is argued to be a precursor to the employee's overall performance through a class of mediating variables labeled “socially derived outcomes,” which are variables inside the organization that are bestowed upon the employee as a result of them first engaging in proactive behavior (e.g., IEN). Two studies are reported. Study I sees IEN psychometrically validated versus a range of existing proactive behaviors and individual traits (discriminant, nomological, and criterion‐related validity) with a heterogeneous sample of 704 employees. Study II then tests a model relating IEN to performance through six mediating “socially derived outcomes” by leveraging data from 2 Fortune 500 firms. The results of Study II show that IEN significantly impacts multiple measures of the employee's overall performance through mediating effects brought about by key socially derived outcomes, such as the employee's “manager alignment.” The contributions, broader implications, and limitations of the research are then put into context.     

Essentializing differences between women and men

People represent many social categories, including gender categories, in essentialist terms: They see category members as sharing deep, nonobvious properties that make them the kinds of things they are. The present research explored the consequences of this mode of representation for social inferences. In two sets of studies, participants learned (a) that they were similar to a member of the other gender on a novel attribute, (b) that they were different from a member of the other gender on a novel attribute, or (c) just their own standing on a novel attribute. Results showed that participants made stronger inductive inferences about the attribute in question when they learned that it distinguished them from a member of the other gender than in the other conditions. We consider the implications of these results for the representation of social categories and for everyday social inference processes.     

Interrelations of empathy,cognition, and moral reasoning with dimensions of juvenile delinquency

The interrelations of a variety of indices of sociocognitive development (empathy, role-taking, logical cognition, and moral reasoning) were studied in delinquent and nondelinquent adolescents. Delinquent males (grouped into psychopathic, neurotic, and subcultural subgroups) and a matched nondelinquent comparison group were administered individually two empathy scales (the Davis Interpersonal Reactivity Index and the Mehrabian and Epstein Questionnaire Measure of Emotional Empathy), an adaptation of Byrne's and Flavell's role-taking tasks, two Piagetian cognitive tasks, and two of Kohlberg's structured moral dilemmas. Delinquents as a group displayed significantly more immature modes of role-taking, logical cognition, and moral reasoning than did nondelinquents. The delinquent subgroups, however, did not significantly differ from one another on these dimensions. Role-taking, logical cognition, and moral reasoning were significantly related to one another. Anticipated differences in level of empathy between the delinquent and nondelinquent adolescents failed to occur. A number of interpretations for this unexpected finding are offered.This study is based on a doctoral dissertation submitted to the University of Texas at Austin (Lee, 1983) and presented in part at the meetings of the Western Psychological Association, San Jose, April 1985, and the International Society for the Study of Behavioural Development, Tours, France, July 1985. Appreciation is expressed to James Bieri, Edward T. Emmer, Guy J. Manaster, Philip M. Powell, and Robert K. Young for constructive suggestions at various phases of the study.Delinquents were drawn from the Brownwood (Texas) State School through the cordial collaboration of Adrian Moore, Director of Planning, Research, and Evaluation of the Texas Youth Commission. The support of Cary Cockerell, superintendent at the Brownwood State School, and Dann Barger, superintendent at the Statewide Reception Center, and their staff was also instrumental in securing delinquents. Nondelinquents were obtained through the cooperation of Jack Allison, principal of the Travis High School, Austin, Texas, and his staff. Freda M. Holley, Director of the Office of Research and Evaluation, Austin Independent School District, and her staff are thanked for their assistance in obtaining these subjects.The contributions of Danny Escobar and of Ping-Fong Chu in scoring protocols is gratefully acknowledged.     

Simian scribbles: a reappraisal of drawing in the chimpanzee (Pan troglodytes)

Three chimpanzees (Pan troglodytes) were provided with 18 different stimulus pages for drawing. The resulting 618 drawings were coded for drawn marks, and results were compared with early reports on ape drawing (Morris, 1962; Schiller, 1951) and with more recent systematic studies (Smith, 1973). The findings of the present study confirm Smith's observations of a tendency for the animals to draw closer to the center and toward the bottom of the page. No evidence for perceptual balancing was observed in drawings produced on pages with lateral figures, nor was any evidence for closure apparent with complex figures. The present results agree with earlier findings that chimpanzees will engage in drawing activities without training or reinforcement, and this behavior may reflect their intrinsic interest in exploratory and manipulative play.