Coordination of complex bimanual multijoint movements under increasing cycling frequencies: The prevalence of mirror-image and translational symmetry

The present study examined the principles underlying inter and intralimb coordination constraints during performance of bimanual elbow–wrist movements at different cycling frequencies (from 0.75 Hz to 2.50 Hz). Participants performed eight coordination tasks that consisted of a combination of in-phase (IN) and/or anti-phase (AN) coordination modes between both elbows and wrists (interlimb), with isodirectional (Iso) or non-isodirectional (NonI) coordination modes within each limb (intralimb). As expected, the principle of muscle homology (in-phase coordination), giving rise to mirror symmetrical movements with respect to the mid-sagittal plane, had a powerful influence on the quality of global coordinative behavior both between and within limbs. When this principle was violated (i.e., when the anti-phase mode was introduced in one or both joint pairs), the non-isodirectional intralimb mode exhibited a (de)stabilizing role in coordination, which became more pronounced at higher cycling frequencies. However, pattern loss with increasing cycling frequency resulted not only in convergence toward the more stable in-phase patterns with the elbows and wrists but also to the anti-phase patterns (which were associated with directional compatibility of within-limb motions). Moreover, participants generally preserved their initial mode of coordination (either in-phase or anti-phase) in the proximal joints (i.e., elbows) while shifting from anti-phase to in-phase (or vice versa) with their distal joint pair (i.e., wrists). Taken together, these findings reflect the impact of two immanent types of symmetry in bimanual coordination: mirror-image and translational symmetry.     

Restoring the Spiritual: Reflections on Arrogance and Myopia—Allopathic and Holistic

Over the past two decades, researchers have successfully accumulated lots of data pointing to a salutary impact of religious involvement. But progress in the religion and health field has been inhibited by the relative lack of attention to important conceptual and theoretical issues. This paper asserts that until we focus as much on the latter as on the former, this field will remain marginalized and thus ineffective in contributing to understandings of the determinants of health and healing. Careful attention to the how and why of a religion–health connection is imperative for bringing this research into the mainstream of biomedicine.     

The five-factor personality model in applied settings

Two studies of the Revised NEO-Personality Inventory (NEO-PI-R) conducted on two different applicant samples (one consisting of 539 female subjects and the other consisting of 396 male subjects) are reported. Factor analysis of the female sample yielded a five-factor solution, highly congruent with the factors presented by Costa, McCrae and Dye (1991). Results of the male data were less clear-cut, yielding four to five factors which were moderately congruent with the American data. The combined male and female sample showed again high congruence coefficients. Various minor deviations in the location of the facet variables are discussed.     

The role of memory and integration in early time concepts

The nature of 5- to 8-year-old childrens ' time concepts was examined by analyzing two possible explanations for the greater difficulty children demonstrate in comparing durations that differ in beginning times as compared to those that differ in ending times. The explanations were (a) poor recall of beginnings as compared to endings due to their lower salience, (b) difficulty in integrating information from both points and reliance on endings only due to their greater salience. The subjects were 630 boys and girls from kindergarten to second grade. The children were presented with a series of two lights in different orders and combinations and were asked to compare order of beginnings and endings, and duration of the two lights. Results contradicted the memory explanation. In addition, repetitious questioning about order of one point (beginning or ending) appeared to have shifted children's attention from that point to the complementary point. Possible sources of children's failure to integrate beginning and end points when comparing durations were discussed.     

Information integration in price-quality tradeoffs: The effect of missing information

Support for averaging processes in information integration has relied on experimental designs in which the amount of information to be integrated was varied. The usual interpretation is that subjects balance the values of the various stimuli presented on a given trial. An alternative interpretation is that subjects may use their perceptions of the relationship between stimulus dimensions to infer the value of missing information. In the present study, subjects were asked to rate their expected satisfaction with purchases of ground beef on the basis of quality and/or price information. The responses of some subjects appeared to be based on the inference that high prices imply high quality and low prices imply low quality when no quality information is given. Other subjects appeared to assign a constant value to missing information. An averaging model that incorporates inferred as well as presented stimulus values is proposed.     

Family therapy for the borderline patient

Family therapy can be an appropriate modality of treatment for borderline patients: family sessions may be helpful in making order out of chaos in the system. It also takes into account the fear of separation and other developmental issues which are of concern to the borderline patient. Issues related to the structure and format of sessions in the beginning and middle phase of therapy are discussed. Progress and treatment implications including transference reactions are examined. We have concluded that the family members in a case presented have become considerably stronger and more independent. Their current developmental level indicates that we can begin to work on intrapsychic factors.     

Running: An adjunctive group therapy technique

Group therapists who work with severely disturbed patients know that group sessions are often characterized by verbal rambling, frequent and prolonged pauses and high levels of anxiety on the part of group members. This article focuses on the use of a group activity— namely, running—as an adjunct to group psychotherapy. A brief case report will illustrate the application of this innovative treatment technique; then issues that may arise when one leads a running group are dealt with in a question- and -answer format.The author wishes to express his appreciation to Mrs. Vera Kohn for editorial assistance in the preparation of this article.     

The effects of strategy—Monitoring training on children's selection of effective memory strategies

Second grade children were given training in general principles of strategy monitoring prior to being exposed to differentially effective acquisition strategies in a memory task. The results showed that even though both experimental and placebo control groups could assess when they remembered better, more experimental than control children attributed performance differences to their strategic behavior and then selected the more effective strategy on a forced-choice trial. These findings indicate that instruction in general memory-monitoring principles is sufficient to effect a change in strategy usage. The study therefore provides direct experimental support for the presumed relationship between metacognitive knowledge and subsequent strategy use.     

A further consideration in the application of an analysis-of-variance model for the intrasubject replication design

It is argued that the analysis-of-variance model is inappropriate for assessing treatment effects in single-subject designs. In particular, such designs are demonstrated to violate the crucial assumption concerning the statistical independence of observations. Alternative methods of data analysis are suggested.     

The role of overt activity in children's sentence production

Nursery schooler's abilityto associate pairs of toys was assessed under four experimental conditions: (1) control, (2) S manipulating the toys, (3) S generating a sentence, and (4) S generating a sentence while manipulating the toys. All three S-involvement conditions produced significantly better recognition performance than the control but contrary to initial predictions, the difference between the sentence-only and sentence-plus-manipulation conditions was not significant. In contrast to previous research, Ss in the sentence-only conditions had little difficulty producing sentences when asked. Of interest was the finding that the quality of sentence production was poorer in the sentence-plus-manipulation condition than in the sentence-only condition. Results are discussed in terms of the possible “conflict” produced when the child is required to engage in more than one overt activity simultaneously.