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PubMed2006

Relationships between cohesion, collective efficacy and performance in professional basketball teams: an examination of mediating effects.

The main aim of this study was to examine mediating effects in the relationships between cohesion, collective efficacy and performance in professional basketball teams. A secondary aim was to examine the correlates of collective efficacy in a professional sport. A total of 154 French and foreign professional players completed French or English versions of questionnaires about cohesion and collective efficacy. Two composite measures of individual performance were used (pre- and post-performance). Individual-level analyses were performed. Regression analyses supported two mediating relationships with collective efficacy as a mediator of the pre-performance - Group integration-task relationship, and Group integration-task as a mediator of the pre-performance - collective efficacy relationship. Statistical analyses indicated that neither Group integration-task nor collective efficacy was a better mediator in the relationship between pre-performance and the other group variables. Results also revealed positive relationships between three dimensions of cohesion (i.e. Individual attractions to the group-task, Group integration-task, Group integration-social) and collective efficacy. These findings suggest that in professional basketball teams, staff members should look after athletes who perform at a lower or below their usual level because their performances might lead them into a downward cohesion - collective efficacy spiral. Staff members should also develop a high quality of group functioning, both on and off the basketball court, given its relationship with collective efficacy.

Adult↗
PubMed2005

The impact of head injury neurobehavioural sequelae on personal relationships: preliminary findings.

BACKGROUND: Existing evidence suggests that neurobehavioural disability is a frequent legacy of serious head trauma and has a major impact on the psychological well-being of relatives and friends of people with brain injuries. OBJECTIVE: To explore which neurobehavioural legacies of serious head trauma have the greatest impact on personal relationships and increase the risk of relationship breakdown. METHOD: Forty-eight partners of people who had suffered serious head trauma were asked to complete a 12-item measure to rate how different neurobehavioural characteristics had adversely affected their relationship with the brain injured person. Twenty-three couples who had divorced or separated from their injured partner in the years following injury comprised the 'separated' group, 25 still in the relationship at the time data were collected comprised the 'together' group. RESULTS: Even though many neurobehavioural characteristics of brain injury were reported by partners of both the separated and the together group as placing a strain on the relationship only mood swings accounted for a significant between groups difference [t(40.13) = 3.33, p = 0.002]. The magnitude of the difference in the means was large (712 = 0.19). CONCLUSIONS: Unpredictable patterns of behaviour, as perceived by partners of brain injured individuals, impose the greatest burden on personal relationships and may contribute to relationship breakdown.

Adolescent↗
PubMed2001

The negotiation of sexual relationships among school pupils in south-western Uganda.

The objective of the study was to explore how school-going adolescents in south-western Uganda negotiate sexual relationships. Qualitative data were obtained from 15 boys and 15 girls (14-18 years old), during a series of role plays, focus group discussions and one-to-one interviews. A questionnaire was administered to 80 pupils (12-20 years old) from the same school. Most of the pupils were sexually active. Sexual relationships between boys and girls were mediated by peers. Boys initiated relationships. Exchange played an important role in the negotiation of sexual relationships. Money or gifts were given and received in exchange for sexual favours and to strengthen the relationship. To maximize gains, some adolescents had sexual relationships with adults. Sexual relationships were characterized by ambiguity. Love is intertwined with sexual desire, money and prestige. Girls have to be explicit enough to get a good deal; if they are too explicit they will be stigmatized as 'loose' but if they are not interested in money they may be suspected of wanting to spread HIV. Boys try to persuade girls that they have money, but do not want to emphasize this too much. In sexual negotiations a boy must persuade a girl that although he is modern and sophisticated (i.e. experienced) he does not chase after every girl; the girl does not want to come over as an unsophisticated virgin, but does not want to give the impression that she is loose either. There is a tension between the traditional ideal of female chastity and submissiveness and the modern image of sexual freedom. Multiple partnerships were highly valued as a sign of sophistication. Condoms were not considered important. Interventions aimed at reducing the spread of HIV do not seem to be having an effect on the behaviour of this group of adolescents. On the contrary, risky attitudes and behaviour are part of an adolescent ideal of modernity and sophistication. New approaches are needed to persuade this group of the need for change. Shifting the source of interventions from adults to the adolescents themselves, encouraging girls to try other means of earning money and debunking the idea that having many partners is sophisticated may be productive alternatives.

Acquired Immunodeficiency Syndrome↗
PubMed2001

Consistent condom use in the heterosexual relationships of young adults who live in a high-HIV-risk neighbourhood and do not use "hard drugs".

This study was set up to determine the predictors of condom use in the heterosexual non-commercial sexual relationships of young adults who neither inject drugs nor use cocaine, heroin or crack, in a neighbourhood with widespread drug-use-connected HIV. The analytic sample is 279 young adults, aged 18-24, who have never injected drugs and who have not used heroin, cocaine or crack in the last year. They were recruited in the Bushwick neighbourhood of New York City, July 1997 to September 1999. A face-to-face interview included items about their sociodemographic background, substance use and sexual networks. Sexual relationship and self-reported consistent (100%) condom use over the prior year with the partner in a given relationship was examined. Subjects had 337 heterosexual non-commercial relationships. Consistent condom use was reported in 32% of these relationships. In multiple logistic regression, consistent condom use was more likely in relationships that are not 'very close' (odds ratio = 3.92; 95% confidence interval = 2.08, 7.52); in the relationships of subjects whose peer norms support condom use (OR = 1.94; 95% CI = 1.43, 2.69), who are not problem drinkers (OR = 8.70; 95% CI = 2.22, 58.8), and (perhaps as a result of measurement issues) who are men (OR = 1.95; 95% CI = 1.04, 3.68). In conclusion, consistent condom use remains uncommon among youth in this high-risk neighbourhood. It is thus important to keep HIV from entering the sexual networks of youth in communities like this through programmes aimed at drug injectors and their sexual partners. Programmes to increase condom use among young adults should focus on strengthening norms that promote safer sex to protect oneself and others. In addition, assistance should be provided to youth who are problem drinkers.

Adolescent↗
PubMed2002

Relationship power, condom use and HIV risk among women in the USA.

Women's ability to negotiate safer sexual practices, particularly condom use, is a vital component of HIV/STD prevention strategies. Gender-based power imbalances may constrain women's negotiation ability, yet few empirical studies have tested the hypothesis that sexual relationship power constitutes a key factor in condom use negotiation. In this investigation, a new measure - the Sexual Relationship Power Scale (SRPS) - was applied. Data were collected from 388, mostly Latina, women at an urban community health centre in Massachusetts. Women with high levels of relationship power were five times as likely as women with low levels to report consistent condom use, after controlling for sociodemographic and psychosocial variables (p < 0.05). Population attributable risk estimates indicate that 52% of the lack of consistent condom use among women can be attributed to low sexual relationship power. The strong association between the Sexual Relationship Power Scale and consistent condom use supports the hypothesis that relationship power plays a key role in safer sex decision making. These findings underscore the importance of including the issue of relationship power in the design and implementation of programmes that promote sexual and reproductive health, as well as research investigating condom use and HIV risk.

Adolescent↗
PubMed2003

Sexual sensation seeking, reduced concern about HIV and sexual risk behaviour among gay men in primary relationships.

Gay and bisexual men who indicated they were currently in a primary relationship with another man (N = 230) completed measures of HIV treatment attitudes, sexual risk behaviour and sexual sensation seeking. Results indicate non-primary partner sexual activity is common in many gay relationships and men in non-exclusive relationships possessed greater levels of sexual sensation seeking and treatment-related reduced concern about the dangerousness of HIV than men in exclusive relationships. Results also suggest that individuals who were members of HIV-seroconcordant relationships were more likely to engage in unprotected sexual activity with their primary sexual partners than gay men who were members of HIV-discordant couples. A series of regression analyses revealed that reduced concern about HIV mediated the relationship between sexual sensation seeking and sexual risk behaviour. The next generation of HIV prevention interventions must address the attitudinal shifts that have occurred among some gay men regarding the seriousness of HIV and should be sensitive to the dynamics of gay relationships.

Adult↗
PubMed2005

Predictors of young adults' representations of and behavior in their current romantic relationship: prospective tests of the prototype hypothesis.

Although attachment theory suggests that childhood experiences with caregivers serve as a prototype for adult love relationships, few explicit tests of this hypothesis exist in the literature. Drawing on data from a longitudinal cohort followed from birth to young adulthood, this paper examined correlates and antecedents of young adults' representations of and behavior in their current romantic relationship. Young adults who experienced a secure relationship with their primary caregiver in infancy as assessed in the Strange Situation were more likely to (a) produce coherent discourse regarding their current romantic partnership in the context of the Current Relationship Interview (CRI) and (b) have a higher quality romantic relationship as observed in standard conflict and collaboration tasks. Infant security accounted for variation in CRI security above and beyond the observed quality of participants' current romantic relationship. In contrast, the association between infant and romantic security was partially mediated by individuals' self-reports about their romantic experiences, suggesting that one plausible mechanism by which early experiences with caregivers shape young adults' representations of their attachments with romantic partners is through adults' expectations for and perceptions of love relationships.

Adult↗
PubMedDate not supplied

Family background characteristics and relationship satisfaction in a native community in Canada.

Using data collected from a Native Canadian community by Embree (1993), we examine the influence of personal and family background characteristics on satisfaction with spousal relationships, both legal marriages and cohabitations. Of special interest are the quality of relationships with parents while growing up, alcohol abuse by the parent(s), and the experience of sexual abuse during childhood. Personal traits such as age, sex, and gender role attitudes and the respondent's own drinking behavior are also considered. Path analytic techniques model both the direct effects of independent variables on relationship satisfaction as well as the role of personal consumption of alcohol as an intervening variable in level of satisfaction with a relationship. The results of the analysis indicate that personal consumption of alcohol and the experience of sexual abuse during childhood are the best direct predictors of level of satisfaction with the current relationship, with higher alcohol consumption and experience of sexual abuse related to lower satisfaction. Age also has a significant direct, though smaller, positive influence on relationship satisfaction. Sexual abuse and the respondent's sex are also linked to level of satisfaction through personal alcohol consumption. With personal alcohol use, both the respondent's sex and the experience of sexual abuse during childhood have a significant effect, with males and those sexually abused as children reporting higher levels of alcohol consumption. The socialization explanation of the intergenerational consequences of parental behavior argues that parental role models are primary to the future family formation behavior of children. Consistent with this hypothesis, the findings concerning sexual abuse, in particular, as a predictor of both personal alcohol use and relationship satisfaction seem to underscore the importance of antecedent family characteristics in influencing later adjustment to adult roles and responsibilities.

Adult↗
PubMed1997

Accurate inference of relationships in sib-pair linkage studies.

Relative-pair designs are routinely employed in linkage studies of complex genetic diseases and quantitative traits. Valid application of these methods requires correct specification of the relationships of the pairs. For example, within a sibship, presumed full sibs actually might be MZ twins, half sibs, or unrelated. Misclassification of half-sib pairs or unrelated individuals as full sibs can result in reduced power to detect linkage. When other family members, such as parents or additional siblings, are available, incorrectly specified relationships usually will be detected through apparent incompatibilities with Mendelian inheritance. Without other family members, sibling relationships cannot be determined absolutely, but they still can be inferred probabilistically if sufficient genetic marker data are available. In this paper, we describe a simple likelihood ratio method to infer the true relationship of a putative sibling pair. We explore the number of markers required to accurately infer relationships typically encountered in a sib-pair study, as a function of marker allele frequencies, marker spacing, and genotyping error rate, and we conclude that very accurate inference of relationships can be achieved, given the marker data from even part of a genome scan. We compare our method to related methods of relationship inference that have been suggested. Finally, we demonstrate the value of excluding non-full sibs in a genetic linkage study of non-insulin-dependent diabetes mellitus.

Alleles↗
PubMed2001

Age/sex/location: uncovering the social cues in the development of online relationships.

Past research on online relationships has predominantly been concerned with how the quality of online relationships compares with offline relationships. This research has been more concerned with the medium itself than with the meanings that users construct around their interpersonal interactions within this medium. The current paper seeks to redress this imbalance by exploring the ways that available social cues are used to shape the meanings of online relationships. Sixty Internet users, ranging in age from 19-51 years, were interviewed about their online relationships. It was found that ideals that are important in traditional relationships, such as trust, honesty, and commitment are just as important in online relationships; however, the cues that signify these ideals vary.

Adolescent↗
PubMed2002

College students' Internet use, relationship formation, and personality correlates.

The Internet has become a standard fixture in the lives of many people, with communication being one of its most popular uses. Several mediums-such as electronic mail (e-mail), group mailing forums, interactive games, and real-time chatting-provide users with communication opportunities. Through extended communication on the Internet, many users have formed relationships with others online. Several aspects of the Internet medium interact to make the course of relationship development online differ from offline development. The Internet is still a rather uncharted area in terms of psychological research, especially in the field of online relationship development. This research examined college students' Internet use, relationship formation, and personality characteristics. No differences were found between participants who did and did not form new relationships online. However, differences were present within the group that formed online relationships, such as ease at finding similar others online as well as differences in social skills and loneliness scores. This calls for a reexamination of previous hypotheses regarding individuals who form relationships online.

Adolescent↗
PubMed2000

The psychological impact of aging on sexuality and relationships.

Aging has a powerful impact on the quality of relationships and sexual functioning. The psychological impact of aging after midlife is a particularly timely topic given improved medical and psychological understanding of sexuality in both women and men, as well as more effective treatment for age-related sexual dysfunctions. It is time to dispel the stereotype of the midlife relationship as the continuation of a traditional heterosexual marriage with grown or almost grown children in order to more effectively address emotional and sexual issues arising in relationships. Regardless of the length or nature of the relationship, however, its quality is enhanced by emotional intimacy, autonomy without too much distance, an ability to manage stress and distractions by external factors, and achieving a satisfying sexual equilibrium. Perception of the quality of the primary relationship and sexuality is influenced by the other factors in a person's life. Thus, the relationship must be examined and issues must be addressed taking these external factors into consideration. Among the most powerful external factors is one's occupation or avocation, as it tends to strongly influence one's sense of identity, self-esteem, and self-worth in all areas of life. To understand and treat effects of aging on sexuality, it is important to address the three components of sexual desire: drive, beliefs/values, and motivation, as well as the sexual equilibrium within the primary relationship. It is also essential to understand how the physiological changes in male and female sexual functioning affect desire and equilibrium. Other health-related changes that occur with aging must be recognized and addressed, including the fact that the oldest of old women will outlive their corresponding male cohort. Treatment implications for these issues are discussed.

Aging↗
PubMed2005

The relationship between nuclear DNA content and leaf strategy in seed plants.

BACKGROUND AND AIMS: Species' 2C-values (mass of DNA in G(1) phase 2n nuclei) vary by at least four orders of magnitude among seed plants. The 2C-value has been shown to be co-ordinated with a number of other species traits, and with environmental variables. A prediction that species 2C-values are negatively related to leaf life span (LL) and leaf mass per area (LMA) is tested. These leaf traits are components of a major dimension of ecological variation among plant species. METHODS: Flow cytometry was used to measure the 2C-values for 41 Australian seed plant species, 40 of which were new to the literature. Where possible, LL and LMA data from the global literature were combined with 2C-values from our data set and online C-value databases. KEY RESULTS: Across all species, weak positive relationships were found between 2C-values and both LL and LMA; however, these did not reflect the relationships within either angiosperms or gymnosperms. Across 59 angiosperm species, there were weak negative relationships between 2C-values and both LL (r2 = 0.13, P = 0.005) and LMA (r2 = 0.15, P = 0.002). These relationships were the result of shifts to longer LL and greater LMA in woody compared with herbaceous growth forms, with no relationships present within growth forms. It was not possible to explain a positive relationship between 2C-values and LMA (r2 = 0.30, P = 0.024) across 17 gymnosperm species. The 2C-value was not related to LL or LMA either across species within orders (except for LMA among Pinales), or as radiation divergences in a model phylogeny. CONCLUSIONS: Gymnosperms appear to vary along a spectrum different from angiosperms. Among angiosperms, weak negative cross-species relationships were associated with growth form differences, and traced to a few divergences deep in the model phylogeny. These results suggest that among angiosperms, nuclear DNA content and leaf strategy are unrelated.

Cell Nucleus↗
PubMed1994

Accounting for the Gregg effect in tetanised coronary arterial pressure-flow relationships.

OBJECTIVE: Myocardial contraction shifts the diastolic coronary pressure-flow relationship to lower flows at any given pressure, the amount of shift being determined primarily by the contractile level. A portion of this shift may be attributable to the Gregg effect. The purpose of this study was to quantify the influence of the Gregg effect and thereby demonstrate the pure effect of activation at a constant contractile level on the pressure-flow relationships. METHODS: It was first shown in beating canine interventricular septa that transverse stiffness induced by small high frequency indentations transverse to the plane of the tissue was an index of contractility. At constant perfusion pressure and preload, there was an inverse relationship between peak transverse stiffness and contractile level (induced by graded doses of 2,3-butanedione monoxime) for both isotonic and auxotonic contractions. A Gregg effect was next verified by showing a linear dependence between transverse stiffness and perfusion pressure during ryanodine induced tetanizations. Finally, the relationship between changes in flow and transverse stiffness was determined from diastole to tetany at two contractile levels. These relationships suffice to quantify the Gregg effect. RESULTS: Correcting for the Gregg effect from the transverse stiffness measurements obtained concomitantly with previously reported pressure-flow data in six specimens showed the following: using a linear fit to the pressure-flow data, the mean slope of the diastolic pressure-flow relationships decreased from 0.88 to 0.81 and 0.74 ml.min-1 x mmHg-1 during tetanisation at normal and reduced contractile levels, respectively. Correcting for the Gregg effect decreased the tetanised slopes to intermediate values of 0.85 and 0.79 ml.min-1 x mmHg-1, respectively. CONCLUSIONS: A small but clearly discernible portion of the shift in tetanised pressure-flow relationships is attributable to the Gregg effect. Similar conclusions pertained when quadratic regressions were fitted to the pressure-flow data.

Animals↗
PubMed2003

Patterns of change in marital relationships among parents of children with cancer.

This study examined changes in marital relationships among parents of children with cancer. Data for both parents of 35 children treated for cancer for less than a year to more than five years showed changes in marital relationships across 10 dimensions of the relationship. The findings showed that some aspects of the relationship (for example, communication and trust) tended to be strengthened, whereas others (especially sexuality) were prone to deterioration. Second, changes in the marital relationship were examined in relation to the duration of illness. The data showed a slight decrease in relationship satisfaction within one year of diagnosis, an increase in marital strength in cases of children who had been ill for two or three years, and a deterioration in the marital relationship after more than four years of children's illness.

Adolescent↗
PubMed1993

Predictors of decline in social relationships in the rural elderly.

Prospective evidence for predictors of decline in social relationships over a 3-year follow-up period in an elderly cohort are presented. The cohort consisted of men (n = 903) and women (n = 1,673) over age 65 years in two rural Iowa counties who were interviewed in 1982 and again in 1985. Three separate measures of social relationships were dichotomized into lower and higher levels and included the number of close friends and relatives (less than three vs. three or more), church attendance (less than once per month or not at all vs. once per month or more), and membership in a group (nonmember vs. member). Those with higher social relationship levels at both interviews were compared with those who had higher levels at baseline but lower levels at follow-up (i.e., a decline in social relationship level) using logistic regression. In multivariate analysis, important baseline predictors of decline in social relationship levels included greater age, lower educational level, lower memory test score, the presence of physical disabilities, and a higher level of depressive symptoms. Marital status and lower self-perceived health status were less consistent predictors, and having any living children, history of major illness, and continence status were generally not important predictors of decline in social relationship levels. These findings underscore the multifactorial and complex influences on changes in social relationships, but they also identify factors for possible prevention and intervention strategies.

Aged↗
PubMed2003

Attachment and core relationship themes: wishes for autonomy and closeness in the narratives of securely and insecurely attached adults.

This study examines links between attachment states of mind and relationship schemas in a sample of 40 young adults, half of whom were hospitalized as adolescents for psychiatric treatment. Participants were interviewed about their closest relationships, and, using the Core Conflictual Relationship Theme method, their narratives about these relationships were analyzed for the relative frequency with which they expressed wishes for closeness and for autonomy in relation to others. Participants were also administered the Adult Attachment Interview and were classified with respect to security of attachment. Security of attachment was associated with the relative frequency with which participants expressed wishes for autonomy in their narratives about close relationships, even after accounting for current levels of psychological functioning and history of serious psychopathology in adolescence. Security of attachment was not associated with the relative frequency with which participants expressed wishes for closeness. The study suggests that core relational wishes for autonomy are linked specifically with subtypes of insecure attachment. These findings extend what is known about connections between the representation of early attachment relationships and the wishes and needs expressed in current relationships with significant others.

Journal Article↗
PubMed1996

Pressure-heart rate relationship in intact and after stepwise elimination of three major baroreflex loops in dogs.

Systemic arterial blood pressure (BP)-heart rate (HR) relationship (the pressor test) is often used as an index of baroreflex. We evaluated this index by simultaneously comparing BP-HR, right carotid sinus pressure (CSP)-nerve action potentials (NAP), and NAP-HR relationship in dogs anesthetized with pentobarbital. BP was increased or decreased stepwise by intravenous (IV) infusions of phenylephrine or sodium nitroprusside, respectively. In nine dogs BP-HR and CSP-NAP relationships were measured and NAP-HR relationship was constructed before and after sequential and stepwise sectioning of the left aortic depressor nerve (LADN), the right aortic depressor nerve (RADN), and blockade of the left carotid sinus nerve (BLK) with 1% lidocaine. We found that HR was a negative sigmoidal function of BP in intact dogs. Linear slope of this relationship was significantly reduced after sectioning of LADN and RADN, but returned toward baseline after BLK. NAP was a positive sigmoidal function of CSP in intact dogs. Linear slope of this relationship was significantly depressed after sectioning of LADN and RADN. However, after BLK, the slope surpassed control, suggesting the existence of a central communication between the two carotid sinuses. HR was a negative function of NAP in intact dogs. However, as the other baroreflex feedback loops were eliminated, the slope of the NAP-HR relationship approached zero indicating that a closed integrated parallel feedback system is required for reflex regulation of HR. Our findings suggest that under normal conditions the pressor test is a valid index for baroreceptor function, but its use may not be warranted in chronic pathological states, such as atherosclerosis and hypertension. However, in contrast to the present acute experimental model, chronic pathological processes may not develop in sequence, and baroreceptor function on the affected site may not be completely eliminated from the baroreceptor loop such as performed in this study.

Action Potentials↗