Ecological Validity,Representative Design,and Correspondence Between Experimental Task Constraints and Behavioral Setting: Comment on Rogers,Kadar, and Costall (2005)

More than 20 years ago, Swenson (1988) Swenson, R. 1988. Emergence and the principle of maximum entropy production: Multi-level system theory, evolution, and non-equilibrium thermodynamics.. Proceedings of the 32nd annual meeting of the International Society for General Systems Research, 32: 32 [Google Scholar] proposed and elaborated the Law of Maximum Entropy Production (LMEP) as the missing piece of physical or universal law that would account for the ubiquitous and opportunistic transformation from disordered, or less ordered, to more highly ordered states. Given Boltzmann's (1974) Boltzmann, L. 1974. “The second law of thermodynamics”. In Theoretical physics and philosophical problems, Edited by: Bush, S. G. Boston: Reidel. (Original work published 1886) [Google Scholar] interpretation, the Second Law of Thermodynamics has generally been interpreted as a “law of disorder.” Schrödinger (1945) Schrodinger, E. 1945. What is life?, New York: Macmillan.  [Google Scholar] and Bertalanffy (1952) had shown, however, that the Second Law, viewed from the classical perspective of Clausius (1865) Clausius, R. 1865. Ueber verschiedene fur die anwendung bequeme formen der haupt gleichungen der mechanischen warmtheorie.. Annalen der Phys. und Chem., 7: 389–400.  [Google Scholar] and Thomson (1852) Thomson, W. 1852. On the universal tendency in nature to the dissipation of mechanical energy. Philosophical Magazine and Journal of Science, 4: 304–306. [Taylor &; Francis Online] , [Google Scholar], was not anathema to order. Ordered flow, including life, was permissible as long as it produced enough entropy to compensate for its own internal entropy reduction. The central problem remained, however: If the spontaneous production of order was “infinitely improbable,” as Boltzmann had surmised, then why were ordered systems such a fundamental and characteristic property of the visible world? LMEP provided the answer: Order production is inexorable because order produces entropy faster than disorder. In Swenson (1989d) Swenson, R. 1989d. Gauss-in-a-box: Nailing down the first principles of action. Perceiving Acting Workshop Review, 5: 60–63. (Technical Report of the Center for the Ecological Study of Perception and Action) [Google Scholar], LMEP was given expression as a precise law that could be demonstrated in falsifiable, experimental, physical terms. In Swenson and Turvey (1991) Swenson, R. 1991a. “End-directed physics and evolutionary ordering: Obviating the problem of the population of one”. In The cybernetics of complex systems: Self-organization, evolution, and social change, Edited by: Geyer, F. 41–60. Salinas, CA: Intersystems Publications.  [Google Scholar], LMEP was tied explicitly to the progressive emergence of living things with their perception–action capabilities.     

Exploring risk and protective mechanisms associated with HIV infection among adolescents in South Africa

This study explored South African adolescents’ perceived risk and protection for HIV infection. Adolescents (N=28) with a mean age of 14.6 years receiving mental health care participated in Focus Group Discussions (FGDs) to engage in an in-depth exploration of their perceived risk and protective mechanisms for HIV prevention. The data were analysed using thematic content analysis. Themes that emerged from the FGDs associated with risk for HIV infection were: Alcohol and illicit drug use; Non-condom use; Prostitution and risky sexual activity with multiple partners; and Non-disclosure of HIV status. Themes that emerged as protective mechanisms included: HIV knowledge and appropriate HIV risk reducing behaviour; and Proactive parental attitudes and behaviour. These findings highlight the importance of ascertaining the perceptions of adolescents about risk and protection from HIV infection in order to inform future programs for HIV prevention among adolescents.     

Catching With Both Hands: An Evaluation of Neural Cross-Talk and Coordinative Structure Models of Bimanual Coordination

Kelso, Southard, and Goodman (1979) and Marteniuk and MacKenzie (1980) have each proposed a different theoretical model for bimanual coordination. In the model of Kelso et al., a close temporal relationship between the hands in a bimanual task is predicted, even when each hand is required to move different distances. In Marteniuk and MacKenzie's model, separate motor commands are issued so that each limb will arrive simultaneously at the specified movement endpoint, leading to low temporal associations between limbs. In most previous work on bimanual coordination, manual aiming tasks with differing constraints have been used by subjects in individual studies. In this study, the usefulness of existing models for predicting performance in a real-world catching task in which the required movement pattern was constrained by ball flight characteristics was examined. Eleven university students caught tennis balls with both hands in the following 3 conditions: Condition 1. Ball projected to the right shoulder area (left hand moved a greater distance than the right); Condition 2. Ball projected to center of the chest area, (both hands moved same distance); and Condition 3. Ball projected to left shoulder area (right hand moved a greater distance). Kinematic data (time to peak velocity, movement initiation time) indicating significant cross-correlations between the left and right limbs in all 3 conditions concurred with the data of Kelso et al. (1979) on manual aiming. Timing appeared to be an essential variable coordinating bimanual interceptive actions. Although the limbs moved at different speeds when each was required to move different distances, times to peak velocity showed strong associations, suggesting the presence of a coordinative structure.     

Introduction to Group-Analytic Psychotherapy by S. H. Foulkes

This article will explore special leader issues that emerge in psychodynamically oriented therapy groups with adult children of alcoholics. Particular focus will be on countertransference feelings that get stirred up in group leaders and techniques for dealing with some of these special dilemmas. Specific issues include (a) assumption of sameness between the therapist and the patient (the therapist assuming that he or she “understands” because of having also grown up in an alcoholic family); (b) the “will to restore,” which may be destructive when the therapist, whose own self-esteem is dependent on the patient's progress in therapy, forces a “rush to recovery” on the patient; (c) other personal issues in the life of the therapist that may also resonate with experiences of the patient; (d) “countertransference goodness and availability” as it affects therapists' abilities to set reasonable limits on their patients, as well as reasonable expectations for themselves; and (e) special issues regarding therapist transparency and self-disclosure.     

Reasons for Declining Preconception Expanded Carrier Screening Using Genome Sequencing

Genomic carrier screening can identify more disease-associated variants than existing carrier screening methodologies, but its utility from patients’ perspective is not yet established. A randomized controlled trial for preconception genomic carrier screening provided an opportunity to understand patients’ decisions about whether to accept or decline testing. We administered a survey to potential genomic carrier screening recipients who declined participation (N = 240) to evaluate their reasons for doing so. Two thirds of women declined participation. We identified major themes describing reasons these individuals declined to participate; the most common were time limitation, lack of interest, not wanting to know the information, and potential cause of worry or anxiety. Most women eligible for genomic carrier screening indicated that their reasons for opting out were due to logistical issues rather than opposing the rationale for testing. As expanded carrier screening and genomic sequencing become a more routine part of clinical care, it is anticipated there will be variable uptake from individuals for this testing. Thus, the advancement of clinical carrier screening from single genes, to expanded screening panels, to an exome- or genome-wide platform, will require approaches that respect individual choice to receive genetic testing for reproductive risk assessment.     

A Preliminary Investigation of Body Dissatisfaction and Eating Disorder Symptomatology with Bisexual Individuals

Body dissatisfaction and eating disorder symptomatology were examined in bisexual individuals (n?=?139 women, n?=?37 men) and compared to lesbian/gay (n?=?51 women, n?=?96 men) and heterosexual individuals (n?=?82 women, n?=?34 men) in a U.S. online sample. Age, body mass index (BMI), income, and exercise frequency served as covariates. MANCOVA results showed a significant gender by sexual orientation interaction and significant main effects of gender and sexuality. Univariate tests were used to explore multivariate results. ANCOVA results for body dissatisfaction showed a significant gender by sexual orientation interaction. Post-hoc comparisons revealed higher levels of body dissatisfaction among all groups compared to heterosexual men. ANCOVA results for eating disorder symptomatology showed a significant main effect of sexual orientation. Post-hoc comparisons revealed higher levels of eating disorder symptoms among bisexual compared to heterosexual individuals. For bisexual men, gay community involvement, maladaptive social comparison, drive for muscularity, self-esteem, gender role orientation, and body dissatisfaction were explored as predictors of eating disorder symptomatology while controlling for age, BMI, exercise frequency, and income in a hierarchical regression analysis. The same factors, minus body dissatisfaction, were explored as predictors of body dissatisfaction in bisexual men. For bisexual women, similar factors, with the exception of drive for muscularity, were explored. Drive for muscularity predicted body dissatisfaction and exercise frequency predicted eating disorder symptomatology in bisexual men. BMI and self-esteem predicted body dissatisfaction in bisexual women; gay community involvement and body dissatisfaction predicted eating disorder symptomatology.     

Coordination changes in a discrete multi-articular action as a function of practice

This study investigated how novices re-organized motor system degrees of freedom when practicing a multi-articular discrete kicking task. Four male participants practiced a soccer chipping task to seven different target positions over 12 sessions for 4 weeks. Data from each participant indicated changes in degrees of freedom involvement as a function of practice. Further, each participant showed a different progression of change in levels of joint involvement for hip, knee and ankle in the kicking limb. Cross-correlations between joints in the kicking limb also showed different pathways of coupling and de-coupling with practice. Performance outcome scores improved and variability of intra-limb coordination decreased as a consequence of practice for all participants. Angle-angle plots also showed qualitative changes in intra-limb coordination between early and late practice sessions. Evidence suggested that foot velocity at ball contact was functionally manipulated by participants when kicking to target positions with varying height and distance constraints. Referencing data to a model of learning [Newell, K. M. (1985). Coordination, control and skill. In: Goodman, D., Franks, I., & Wilberg, R.B. (Eds.), Differing perspectives in motor learning, memory, and control. Amsterdam: North-Holland, pp. 295-317] determined that progression through different stages of learning may not be sequential and could alternate between learning stages. The present study highlighted individual differences in acquisition of coordination and control of joint motion even under similar task constraints, showing how degeneracy in movement systems facilitates learning.     

Repeated Behavior and Environmental Psychology: The Role of Personal Involvement and Habit Formation in Explaining Water Consumption1

Extending existing theory in social and environmental psychology, we develop a model to study important predictors of water consumption behavior. Overall results provide support for the predictive ability of stimuli (e.g., environmental awareness), reasoned processes (e.g., personal involvement), unreasoned processes (e.g., habits), and situational factors (e.g., income) on water consumption behavior. Findings indicate that households with lower water usage display greater awareness of water conservation issues, are more highly involved in the decision to use water, and tend to form habits associated with lower usage levels. Furthermore, the results are consistent with past research that attitudes toward water usage appear to be poor predictors of water consumption behavior. After controlling for situational factors (e.g., household size), the findings substantiate the role of personal involvement and habit formation in explaining water consumption, lending further support to the adaptation and development of repeated behavior models in environmental psychology.     

Binding feature dimensions in visual short-term memory

We explored several possible influences on binding in visual short-term memory (VSTM) performance. The task was to report whether a test object was the same (“old” trials) or different (“new” trials) from any of the sample objects seen a second ago. The objects were composed of two features that varied from continuous to discrete shapes and colors. In “old” trials the test object appeared either in the same or different position. In “new” trials the test object differed along both features, requiring storage of only one feature per object; along one feature, requiring no binding but storage of all features; or it was created by recombining features from the sample, which requires binding. Existing storage hypotheses are unable to explain the similar sensitivity (d′) obtained in the two last conditions when position remained the same and may suggest that links are created between positions and features. Highest sensitivity occurred when the test object remained at the same position, required no binding, and discrete features were used. Object-type × position, and feature combination × position interactions occurred, suggesting different storage modes depending on whether objects change position during retention.