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At least 343 records · Page 19Linked to original sources
PubMed2006

The thrill of victory and the agony of defeat: spontaneous expressions of medal winners of the 2004 Athens Olympic Games.

Facial behaviors of medal winners of the judo competition at the 2004 Athens Olympic Games were coded with P. Ekman and W. V. Friesen's (1978) Facial Affect Coding System (FACS) and interpreted using their Emotion FACS dictionary. Winners' spontaneous expressions were captured immediately when they completed medal matches, when they received their medal from a dignitary, and when they posed on the podium. The 84 athletes who contributed expressions came from 35 countries. The findings strongly supported the notion that expressions occur in relation to emotionally evocative contexts in people of all cultures, that these expressions correspond to the facial expressions of emotion considered to be universal, that expressions provide information that can reliably differentiate the antecedent situations that produced them, and that expressions that occur without inhibition are different than those that occur in social and interactive settings.

Affect↗
PubMed1996

Cattell's 16 PF and PSY inventory: relationship between personality traits and behavioral responses in patients with acute myocardial infarction.

The aim of this study was to investigate the relationships between personality and behavioral responses in patients with acute myocardial infarction. In a first step, a new instrument (PSY Inventory) for assessment of six behavioral characteristics (Sense of Responsibility, Energy and Competitiveness, Obsessive Behavior, Anger and Hostility, Stress-related Disturbances, Time Urgency) was developed by using factor analysis on intercorrelations of responses from 524 subjects of the general population. Internal consistency reliability for each of the PSY subscales was estimated by Cronbach alpha coefficients. In a second step, the PSY Inventory was administered with the Cattell 16 PF Questionnaire to 838 patients affected by acute myocardial infarction. Significant correlations although relatively low in magnitude for PSY Inventory subscales and certain scales of the Cattell 16 PF were found. With factor analysis on 22 variables (including the six PSY Inventory subscales and the 16 scales of the Cattell 16 PF), five second-order factors were identified, namely, Extraversion, Neurotic Anxiety, Superego Strength, Pathemia, and Neurotic Hostility. While a Pathemia Factor (characterized by sensitivity, imagination, and self-sufficiency) was factorially independent of scales of the PSY Inventory, Extraversion, Neurotic Anxiety, Superego Strength, and Neurotic Hostility Factors were composed of the PSY Inventory scales and Cattell 16 PF scales combined. These relationships would reflect the concordance of internal constructs for behavioral measures of the PSY Inventory and those of personality traits of the 16 PF Questionnaire in patients with acute myocardial infarction.

Adaptation, Psychological↗
PubMedDate not supplied

[The role of inversions in adaptation and speciation].

Studies concerning the effect of population-specific inversions on mating behavior of Drosophila lummei Hackman showed that competitiveness of males carrying the inversion for mating with females without the inversion significantly decreases, independently from the location of inversions in chromosomes and the origin of studied strains. Crossing of the competing males with the female carrying the population-specific inversion showed that the competitiveness of males with the inversion in their genome increases in a series of crosses but, nevertheless, remains lower than that of males without the inversion. Hence, it can be suggested that population-specific inversions can be involved in prezygotic isolation of specific forms during the species divergence.

Adaptation, Physiological↗
PubMed1997

The role of contextual and personal factors in children's risk taking.

The primary aims of the present studies were to (a) add to the sparse developmental database on risk taking and (b) conduct initial tests of a self-regulation model (SRM) of risk taking. According to the SRM, inappropriate risk taking is associated with overconfidence, falling prey to dysregulating influences (e.g., impulsivity, peer presence, etc.), and an insensitivity to outcomes. Experiment 1 tested these proposals by assessing the effects of peer presence and 4 personal factors on the risk taking of 3rd, 5th, and 7th graders. Results generally supported the predictions of the SRM. In Experiment 2, the SRM gained further support from the finding that 5 variables correlated with risk taking in 4th, 6th, and 8th graders: ability beliefs, a preference for thrill seeking, peer nomination, competitiveness, and interest. The discussion focuses on the meaning of age and gender differences in risk-taking as well as the interventional implications of the SRM.

Age Factors↗
PubMed1999

Influence of competitive adsorption on flocculation and rheology of high-pressure-treated milk protein-stabilized emulsions.

The effect of high-pressure treatment (HPT) on the droplet-size distribution and small-deformation rheology of oil-in-water emulsions containing beta-lactoglobulin and a nonionic surfactant or sodium caseinate has been investigated at neutral pH. Addition of Tween 20 (polyoxyethylenesorbitan monolaurate) to a beta-lactoglobulin-stabilized emulsion results in competitive displacement of the adsorbed globular protein film and, following HPT, the formation of a less flocculated emulsion. The age of the beta-lactoglobulin-stabilized emulsion prior to addition of sodium caseinate influences the competitive adsorption behavior. The strengthening of the beta-lactoglobulin layer with time makes it more resistant to disruption by sodium caseinate. The level of pressure-induced flocculation of beta-lactoglobulin-coated oil droplets depends on the intensity of processing conditions and on the degree of interfacial displacement. In contrast, beta-lactoglobulin added after emulsification appears to show little evidence of competitive adsorption behavior at the caseinate oil-water interface. Changes in the rheological properties of these latter systems following HPT can be attributed to pressure-induced denaturation and gelation of beta-lactoglobulin in the continuous phase of the emulsion.

Adsorption↗
PubMed2000

Coaches' expectations and beliefs regarding benefits of youth sport participation.

Although many have investigated why children participate in sport, little is known about what adults expect children to gain from participation. The present purpose was to examine coaches' expectations of what children should gain from participation in sport and the extent to which coaches believe that these expectations are actually fulfilled. Participants included 109 youth sport coaches who completed a survey packet consisting of a demographic information questionnaire and the Ohio Sport Satisfaction Index. Analysis indicated coaches ranked the variables of having fun, learning life skills, being part of a team, developing confidence, and the excitement of competition as the most important outcomes for the youth they coach. Generally, coaches believe that their expectations are being fulfilled. Coaches' sex and years of coaching were not significantly related to any of the criterion variables in the present study.

Adult↗
PubMed1992

Copulatory behavior, reproduction, and sperm competition in two strains of male rats.

Long-Evans males fathered 72% of the offspring when one Long-Evans and one F344 male mated repeatedly with the same female throughout her estrus. When each male was restricted to one ejaculation and the second male was allowed to begin mating immediately following the first male's ejaculation, the second male left more offspring in each strain. However, the proportion was significantly greater for Long-Evans males. In contrast, there were no strain differences in either number of pregnancies or litter size in noncompetitive matings limited to two ejaculations, the minimal number required to induce pregnancy. The only consistent behavioral differences were the greater number of intromissions performed with shorter latencies by F344 males, differences that cannot readily be used to explain their reduced success. It was hypothesized that the two strains may differ in the adequacy of penile reflexes used to form, set, or dislodge sperm plugs.

Animals↗
PubMed2005

Sexual selection for male dominance reduces opportunities for female mate choice in the European bitterling (Rhodeus sericeus).

Sexual selection involves two main mechanisms: intrasexual competition for mates and intersexual mate choice. We experimentally separated intrasexual (male-male interference competition) and intersexual (female choice) components of sexual selection in a freshwater fish, the European bitterling (Rhodeus sericeus). We compared the roles of multiple morphological and behavioural traits in male success in both components of sexual competition, and their relation to male reproductive success, measured as paternity of offspring. Body size was important for both female choice and male-male competition, though females also preferred males that courted more vigorously. However, dominant males often monopolized females regardless of female preference. Subordinate males were not excluded from reproduction and sired some offspring, possibly through sneaked ejaculations. Male dominance and a greater intensity of carotenoid-based red colouration in their iris were the best predictors of male reproductive success. The extent of red iris colouration and parasite load did not have significant effects on female choice, male dominance or male reproductive success. No effect of parasite load on the expression of red eye colouration was detected, though this may have been due to low parasite prevalence in males overall. In conclusion, we showed that even though larger body size was favoured in both intersexual and intrasexual selection, male-male interference competition reduced opportunities for female choice. Females, despite being choosy, had limited control over the paternity of their offspring. Our study highlights the need for reliable measures of male reproductive success in studies of sexual selection.

Animals↗
PubMed2006

Some doubts about one of the largest smoking prevention programmes in Europe, the smokefree class competition.

With over 600,000 participants in 16 countries, the smokefree class competition is one of the largest smoking prevention programmes in Europe. Participating classes that maintain a smoking prevalence usually below 10% are eligible for a contest and the winner is rewarded with money. There is however no convincing evidence that this competition has any effect on smoking prevalence beyond the short term, and this approach raises serious ethical issues. In particular, the central principle of this competition is to apply negative peer pressure upon teenage smokers. However, promoters of this competition have neglected to report the possible adverse consequences of using negative peer pressure upon smokers. This is a concern, because teenage smokers are more vulnerable than non-smokers, and they are at higher risk of suffering from psychological problems and school failure.

Adolescent↗
PubMed1994

Studying complex decision making in natural settings: using a head-mounted video camera to study competitive orienteering.

Head-mounted video recording is described as a potentially powerful method for studying decision making in natural settings. Most alternative data-collection procedures are intrusive and disruptive of the decision-making processes involved while conventional video-recording procedures are either impractical or impossible. As a severe test of the robustness of the methodology we studied the decision making of 6 experienced orienteers who carried a head-mounted light-weight video camera as they navigated, running as fast as possible, around a set of control points in a forest. Use of the Wilcoxon matched-pairs signed-ranks test indicated that compared with free recall, video-assisted recall evoked (a) significantly greater experiential immersion in the recall, (b) significantly more specific recollections of navigation-related thoughts and feelings, (c) significantly more realizations of map and terrain features and aspects of running speed which were not noticed at the time of actual competition, and (d) significantly greater insight into specific navigational errors and the intrusion of distracting thoughts into the decision-making process. Potential applications of the technique in (a) the environments of emergency services, (b) therapeutic contexts, (c) education and training, and (d) sports psychology are discussed.

Adolescent↗
PubMed2005

Competitive and cooperative adsorption behaviors of phenol and aniline onto nonpolar macroreticular adsorbents.

The adsorption behaviors of phenol and aniline on nonpolar macroreticular adsorbents (NDA100 and Amberlite XAD4) were investigated in single or binary batch system at 293K and 313K respectively in this study. The results indicated that the adsorption isotherms of phenol and aniline on both adsorbents in both systems fitted well Langmuir equation, which indicated a favourable and exothermic process. At the lower equilibrium concentrations, the individual amount adsorbed of phenol or aniline on macroreticular adsorbents in single-component systems was higher than those in binary-component systems because of the competition between phenol and aniline towards the adsorption sites. It is noteworthy, on the contrast, that at higher concentrations, the total uptake amounts of phenol and aniline in binary-component systems were obviously larger than that in single-component systems, and a large excess was noted on the adsorbent surface at saturation, which is presumably due to the cooperative effect primarily arisen from the hydrogen bonding or weak acid-base interaction between phenol and aniline.

Adsorption↗
PubMed1977

Competition for meat between chimpanzees and baboons of the Gombe National Park.

Both chimpanzees (Pan troglodytes) and baboons (Papio anubis) at the Gombe National Park in Western Tanzania are know to catch and eat meat. There are five occasions recorded when chimpanzees were seen to seize prey from baboons and five other occasions when there was evidence strongly suggesting that an appropriation had taken place. This paper describes these observations.

Animals↗
PubMed1984

Males and the advantage of sex.

Most sexual populations are at a two-fold disadvantage to parthenogenetic populations. This is because males are produced in equal numbers to females and males contribute virtually no food supplies to the zygote. Females therefore "waste their energy" in the production of sons. Parthenogenetic females produce only daughters and therefore have a two-fold advantage. It is argued that female choice (of males) and male: male competition can reduce mutational loads and this may compensate for the two-fold disadvantage of males. The Haldane mutation load principle indicates a load of 2mu, where mu is the mutation rate per gamete. Female choice and male: male competition are capable of reducing this substantially. The effect is greatest with mildly deleterious mutations and is therefore dependent on the fitness of the mutations. This is in contrast to the Haldane principle load which is determined by the mutation rate only. As most mutations appear to be mildly deleterious the load in many sexual populations may be substantially below that indicated by the Haldane principle.

Animals↗
PubMed2006

Ranks and rivals: a theory of competition.

Social comparison theories typically imply a comparable degree of competition between commensurate rivals who are competing on a mutually important dimension. However, the present analysis reveals that the degree of competition between such rivals depends on their proximity to a meaningful standard. Studies 1 to 3 test the prediction that individuals become more competitive and less willing to maximize profitable joint gains when they and their commensurate rivals are highly ranked (e.g., #2 vs. #3) than when they are not (e.g., #202 vs. #203). Studies 4 to 6 then generalize these findings, showing that the degree of competition also increases in the proximity of other meaningful standards, such as the bottom of a ranking scale or a qualitative threshold in the middle of a scale. Studies 7 and 8 further examine the psychological processes underlying this phenomenon and reveal that proximity to a standard exerts a direct impact on the basic unidirectional drive upward, beyond the established effects of commensurability and dimension relevance.

Choice Behavior↗
PubMed2002

Expectations of pediatric sport participation among pediatricians, patients, and parents.

As the number of pediatric and adolescent athletes involved in competitive sports continues to grow, and as the competitors in youth sports trend toward a "win at all costs" mentality, pediatricians are increasingly being asked to provide sports medicine treatment and counseling for athletic children. This article outlines the demographic changes in the pediatric and adolescent athlete population in the United States and explains how the pediatrician can become a more effective caregiver to the athletic patient.

Adolescent↗
PubMed1998

The effects of competition and motor reprogramming on visuomotor selection in unilateral neglect.

Patients with unilateral neglect following right hemisphere damage may have difficulty in moving towards contralesional targets. To test the hypothesis that this impairment arises from competing motor programs triggered by irrelevant ipsilesional stimuli, we examined 16 right hemisphere patients, eight with left visual neglect and eight without, in addition to eight healthy control subjects. In experiment 1 subjects performed sequences of movements using their right hand to targets on the contralesional or ipsilesional side of the responding limb. The locations of successive targets in each sequence were either predictable or unpredictable. In separate blocks of trials, targets appeared either alone or with a simultaneous distractor located at the immediately preceding target location. Neglect patients were significantly slower to execute movements to contralesional targets, but only for unpredictable movements and in the presence of a concurrent ipsilesional distractor. In contrast, healthy controls and right hemisphere patients without neglect showed no directional asymmetries of movement execution. In experiment 2 subjects were required to interrupt a predictable, reciprocating sequence of leftward and rightward movements in order to move to an occasional, unpredictable target that occurred either in the direction opposite to that expected, or in the same direction but twice the extent. Neglect patients were significantly slower in reprogramming the direction and extent of movements towards contralesional versus ipsilesional targets, and they also made significantly more errors when executing such movements. Right hemisphere patients without neglect showed a similar bias in reprogramming direction (but not extent) for contralesional targets, whereas healthy controls showed no directional asymmetry in either condition. On the basis of these findings we propose that neglect involves a competitive bias in favour of motor programs for actions directed towards ipsilesional versus contralesional events. We suggest that programming errors and increased latencies for contralesional movements arise because the damaged right hemisphere can no longer effectively inhibit the release of inappropriate motor programs towards ipsilesional events.

Aged↗
PubMed1996

What they want and what they get: the social goals of boys with ADHD and comparison boys.

Twenty-seven boys diagnosed with attention-deficit hyperactivity disorder (ADHD) and 18 comparison boys participated in a competitive tetradic interaction task. Boys were individually interviewed before the game about their goals for the interaction, and adult observers inferred boys' social goals from videotapes of the interaction. Social acceptance was determined by combining positive and negative sociometric nominations collected through individual interviews at the end of the summer research program in which the interaction was held. In their self-reports, ADHD-high aggressive boys prioritized trouble-seeking and fun at the expense of rules to a greater extent than did both ADHD-low aggressive and comparison boys. Observers judged ADHD-high aggressive boys to seek attention more strongly and seek fairness less strongly than of the other two groups. Self-reported goals of defiance and cooperation predicted boys' end-of-program social standing, even with interactional behaviors and subgroup status controlled statistically. Observer-inferred goals were differentially associated with social acceptance for ADHD and comparison boys, suggesting discontinuities in peer interaction processes. Differentiation of goals from behavior and the integral role of children's goals in peer acceptance are discussed.

Aggression↗