Conflict resolution in women is related to trait aggression and menstrual cycle phase

Twenty‐four women with a diagnosis of premenstrual dysphoric disorder (PMDD) and 18 controls took part in a study of patterns of female aggression. They completed a version of the Conflict Tactics Scale for a premenstrual and a follicular phase of their menstrual cycle and for the past year. The Life History of Aggression was completed during a clinician interview. The women used more aggressive tactics to solve conflicts in the premenstrual than in the follicular phase, but the difference was only significant for the PMDD group. During the past year, reasoning was the most common strategy used by women to resolve conflicts, but verbal aggression was also prevalent. Although physical violence was less common, the prevalence of any act of violence was 33% in the controls and 62% in the clinical group. Women with PMDD used both verbal and physical aggression more frequently than the controls and had a higher lifetime history of aggression. Aggression by women toward partners was associated with a general tendency to act aggressively. Aggr. Behav. 29:228–238, 2003. © 2003 Wiley‐Liss, Inc.     

Effects of menstrual cycle phase on aggression measured in the laboratory

This study investigated the effects of menstrual cycle phase on aggression in two groups of women, which differed in the severity of their self-reported perimenstrual symptoms. A low- and a high-symptom group were recruited using the Menstrual Distress Questionnaire (MDQ) to define the groups. Twenty-two subjects (11 low and 11 high symptom) participated across one menstrual cycle: during the premenstrual, menstrual, midfollicular, and ovulatory phases. The Point Subtraction Aggression Paradigm was used to assess aggression on each day of participation. There were three main findings; a) rates of aggressive responding did not vary across phases of the menstrual cycle; b) the high-symptom group emitted higher rates of aggressive responding across the menstrual cycle than did the low-symptom group; and c) rates of aggressive responding correlated with the MDQ's behavioral and psychological scales and not the somatic scales. These findings indicate that the menstrual cycle phase does not differentially affect this laboratory measure of aggression. The differences found between the two symptom groups parallel a few reports indicating that women who differ in retrospectively reported mood and behavioral changes related to their menstrual cycle also differ on a number of other psychometric measures. Aggr. Behav. 24:9–26, 1998. © 1998 Wiley-Liss, Inc.     

Differential effects of the menstrual cycle on reactive and proactive aggression in borderline personality disorder

Borderline personality disorder (BPD) is characterized by rapidly shifting symptoms, including intense anger and aggressive behavior. Understanding how fluctuations in ovarian hormones across the menstrual cycle may contribute to symptom instability is key for accurate assessment of BPD symptoms and effective interventions. Reactive and proactive aggression, as well as anger-in and anger-out, were assessed daily in 15 physically healthy, unmedicated naturally cycling female individuals meeting criteria for BPD across 35 days. Urine luteinizing hormone surge and salivary progesterone were used to confirm ovulation and verify the cycle phase. Multilevel models evaluated cyclical differences of symptoms between cycle phases. Both forms of aggressive behavior demonstrated marked cycle effects, with reactive aggression highest during the midluteal cycle phase, co-occurring with initial increases in anger and irritability and followed by perimenstrual peaks in anger and anger-in. In contrast, highest levels of proactive aggression were observed during the follicular and ovulatory phases, when emotional symptoms and anger were otherwise at lowest levels. These findings highlight the importance of identifying the function of aggression when considering potential psychological and biological influences. Naturally cycling individuals with BPD may be at elevated risk for luteal worsening of a range of interpersonally reactive symptoms, including reactive aggression, whereas proactive aggression may occur more in phases characterized by less emotional and cognitive vulnerability and greater reward sensitivity. Research on aggression in this population should consider cycle effects. Cycling individuals with BPD attempting to reduce aggressive behavior may benefit from cycle-tracking to increase awareness of these effects and to develop appropriate strategies.     

The influence of the menstrual cycle on reactivity to a CO2 challenge among women with and without premenstrual symptoms

Clinically significant premenstrual symptoms (PMS) is conceptualized as a depressive disorder in DSM-5, however, it may share pathophysiological processes with anxiety- and fear-related disorders. Specifically, women with PMS panic at higher rates during biological challenge procedures. It is unclear if this increased interoceptive sensitivity is a general vulnerability or specific to the premenstrual phase. The current study examined the role of menstrual cycle phase on reactivity to a CO₂ challenge among women with (n = 11) and without (n = 26) clinically significant PMS (N = 37). During the late follicular phase (days 6–12), women with and without PMS responded similarly to the CO₂ challenge, whereas during the premenstrual phase (within 5 days before menses), women with PMS reported significantly more intense panic symptoms in response to the challenge than women without PMS. Vulnerability to panic in women with PMS may be specific to the premenstrual phase. Potential psychological and neurobiological mechanisms underlying this phenomenon are discussed.     

Reactive aggression tracks within‐participant changes in women's salivary testosterone

The relation between testosterone and aggression has been relatively well documented in men, but it is less well understood in women. Here we assessed the relationship between salivary testosterone and reactive aggression (i.e., rejection rate for unfair offers) in the Ultimatum Game. Forty naturally cycling women were tested twice, once in the late follicular phase (around ovulation) and once during the luteal phase. Ovulation was determined using urine test strips measuring luteinizing hormone levels. Salivary samples were assayed for testosterone, estradiol, progesterone, and cortisol at both test sessions. There was no association with the cycle, but multilevel modeling revealed a significant within‐participant association between testosterone and rejection rate for extremely unfair offers (i.e., high reactive aggression), indicating that women showed greater reactive aggression when their testosterone levels were higher. Additionally, we found that women with relatively high individual concentrations of testosterone were more likely to reject extremely unfair offers than women with relatively low concentrations of testosterone. This study is the first to demonstrate that women react more aggressively in response to provocation when their testosterone level is high than when their testosterone is low, suggesting that testosterone plays an important role in the regulation of women's aggressive behavior following social provocation.

     

Women in the midluteal phase of the menstrual cycle have difficulty suppressing the processing of negative emotional stimuli: An event-related potential study

Emotion regulation deficits have been implicated in anxiety and depressive disorders, and these internalising disorders are more prevalent in women than men. Few electrophysiological studies have investigated sex differences in emotional reactivity and emotion regulation controlling for menstrual phase. Event-related potentials (ERPs) were recorded from 28 early follicular women, 29 midluteal women, and 27 men who completed an emotion regulation task. A novel finding of increased N2 amplitude during suppression was found for midluteal women compared with men. These findings suggest midluteal women may be significantly less able to suppress cortical processing of negative stimuli compared to men. This ERP finding was complemented by behavioral ratings data which revealed that while both early follicular and midluteal women reported more distress than men, midluteal women also reported greater effort when suppressing their responses than men. P1 and N1 components were increased in midluteal women compared to men regardless of instructional set, suggesting greater early attentional processing. No sex or menstrual phase differences were apparent in P3 or LPP. This study underscores the importance of considering menstrual phase when examining sex differences in the cortical processing of emotion regulation and demonstrates that midluteal women may have deficits in down-regulating their neural and behavioural responses.     

From beliefs to behavior: the mediating role of hostile response selection in predicting aggression

This study evaluated the complementary roles that aggressive normative beliefs and hostile response selections play in predicting adolescents' aggressive behavior. Self‐, peer‐, and teacher‐reported data were collected from 2003 young adolescents from a variety of ethnic backgrounds (Black, Latino, Asian, White) during the fall of their sixth grade year to test the hypothesis that adolescents' hostile response selections mediate the association between their normative beliefs and aggressive reputations among their peers and teachers. Structural equation modeling analyses supported our hypothesis, and the model was found to be consistent across both gender and ethnicity. The results suggest that even though gender and ethnic differences in average levels of aggressive cognitions and behavior exist, the general process linking cognitions and behaviors is the same for all young adolescents. Aggr. Behav. 00:1–20, 2005. © 2005 Wiley‐Liss, Inc.     

An exploratory study on self‐evaluated aggression and androgens in women

Healthy, premenopausal women completed the Buss‐Perry Aggression Questionnaire. Venous blood samples were taken at the mid‐cycle phase of the menstrual cycle to determine plasma androgen levels. Total and free testosterone, 5α‐dihydrotestosterone, androstenedione, and dehydroepiandrosterone were assessed. Path analyses were aimed at finding out which of the five circulating hormones might best predict a latent aggression construct derived from the four subscales of the Aggression Questionnaire. A significant correlation was found between free testosterone and physical and verbal aggression subscales. In addition, the results demonstrate for the first time in women a significant link between 5α‐dihydrotestosterone and anger. Thus, both testosterone and 5α‐dihydrotestosterone may affect, by separate pathways, the basal regulation of aggression‐proneness in women. Aggr. Behav. 28:273–280, 2002. © 2002 Wiley‐Liss, Inc.     

The pornography/aggression linkage: Results from a field study

Renewed concern over the possible effects of pornography has been sparked by a “new” body of research. Foremost among these concerns is the possibility of a linkage between viewing pornography and subsequent aggressive behavior, especially toward women. However, the vast majority of this research is limited to laboratory settings. This study reports on a field experiment which assesses the impact of presenting a pornographic movie on a college campus. A longitudinal, self‐report study of 230 women students was conducted to determine any effects of the film's showing on the sample's experiences with aggression from males. Compared with the weeks prior to and following the movie's showing, no significant difference in reported aggression was found. Further, those women reporting association with males attending the movie reported no significantly different levels of experienced aggression from those women whose companions did not view the film. Reasons for the apparent lack of effect are discussed in light of the laboratory‐based literature.     

Relational aggression in college students: Examining the roles of social anxiety and empathy

This study examined the unique contributions of social anxiety and empathy to relational aggression in 300 19–to–25–year–old (M=21.25; SD=1.32) male (n=97) and female (n=203) college students using hierarchical linear regression analysis. The interactive relations between gender and social anxiety, and between gender and empathy, were also assessed. In addition to the gender and overt aggression covariates, fear of negative evaluation and perspective taking were unique predictors of relational aggression. Males, students who were more overtly aggressive, and those who reported greater fear of negative evaluation were more relationally aggressive than were peers. Students with higher levels of perspective taking reported using less relational aggression than did peers. A gender x empathetic concern interaction indicated that for males only, lower levels of empathetic concern were associated with higher levels of relational aggression. Results are discussed within a social information‐processing perspective. Aggr. Behav. 29:430–439, 2003. © 2003 Wiley‐Liss, Inc.     

The collateral effect of compliance training on aggression

This study represents a report on unexpected positive collateral benefits in the reduction of aggression. The treatment, for compliance across three classes of requests, resulted in the spontaneous reduction in non-targeted aggressive behavior across settings and time. An institutionalized adult male who was severely retarded and chronically aggressive served as the subject. Archival investigator- and facility staff-generated reports of aggressive episodes, based upon an operational definition in use for over a year at the time of the study, were used as dependent measures. A withdrawal design was used to demonstrate the collateral treatment effects upon aggression. The subject received positive treatment for his noncompliance within a multiple baseline across behavior classes design. Fifteen requests were presented to the subject in random order during each treatment session, compliant behavior was reinforced using praise and physical contact. Results of the compliance training showed immediate and marked increases in compliance with a collateral decrease in the incidents of aggression. While aggression increased during the nonintervention follow-up phase of the study, it remained significantly lower than baseline levels.     

Psychiatric nurses' experiences with inpatient aggression

Using a survey instrument, the experiences of psychiatric nurses with inpatient aggression were investigated in East London, U.K. On this “Perceptions of Prevalence Of Aggression Scale” (POPAS), annual experiences with 15 types of disruptive and aggressive behavior were rated anonymously. Staff members were also asked to disclose the number of days missed from work due to inpatient violence. On the basis of these POPAS forms, internal consistency of the instrument, mean reported aggression frequencies, and days missed from work due to violence were calculated. Internal consistency of the POPAS appeared to be reasonable. Verbal abuse and threats were experienced by most of the psychiatric nurses during a one‐year period (i.e., by about 80–90 percent of nurses). Sexual harassment or intimidation was also experienced relatively often on an annual basis (68 percent), particularly by female and young staff members. A minority of staff members (i.e., 16 percent) had experienced severe physical violence. Although not prevalent, this type of behavior was most strongly connected with reporting sick. In particular, staff members working with involuntarily admitted patients experienced much (severe) violence during their work. Although the validity of estimates of aggression prevalence with the POPAS instrument needs to be investigated further, such a survey may be helpful in gaining insight rather quickly into the level of day‐to‐day contact with aggressive behavior. Also, since information on verbal, physical, and sexual violence, and on days missed from work, can be provided anonymously, this rather delicate, but essential management information, may be accessed relatively easily with the POPAS. Aggr. Behav. 00:000–000, 2005. © 2005 Wiley‐Liss, Inc.     

Rough‐and‐tumble play and the regulation of aggression: an observational study of father–child play dyads

Rough‐and‐tumble play (RTP) is a common form of play between fathers and children. It has been suggested that RTP can contribute to the development of selfregulation. This study addressed the hypothesis that the frequency of father–child RTP is related to the frequency of physically aggressive behavior in early childhood. This relationship was expected to be moderated by the dominance relationship between father and son during play. Eighty‐five children between the ages of 2 and 6 years were videotaped during a free‐play session with their fathers in their homes and questionnaire data was collected about father–child RTP frequency during the past year. The play dyads were rated for the degree to which the father dominated play interactions. A significant statistical interaction revealed that RTP frequency was associated with higher levels of physical aggression in children whose fathers were less dominant. These results indicate that RTP is indeed related to physical aggression, though this relationship is moderated by the degree to which the father is a dominant playmate. Aggr. Behav. 35:285–295, 2009. © 2009 Wiley‐Liss, Inc.     

Social isolation,aggression, and dominance in attacks in juvenile angelfish,Pterophyllum scalare

The effects of social isolation on aggressive behavior and rank order have been investigated in small groups of juvenile angelfish, Pterophyllum scalare. An experimental protocol including a “double transfer” of the subjects was used, in which fish were transferred to new aquaria in groups, before subsequent isolation and regrouping. A significant decrease in aggression was observed in the first recording session following both isolation and group transfer, after which the level returned to that recorded in the home tanks. The social hierarchy was also perturbed, but changes generally involed the two highest ranking fish in two out of the three groups, and were found not to be statistically significant. The behavior patterns are interpreted as adaptive responses to environmental change. © 1993 Wiley-Liss, Inc.     

Illuminating the nomological network of digital aggression: Results from two studies

We examined the nomological network surrounding digital aggression (DA), in regards to other forms of aggression/antisocial behavior and individual difference variables commonly associated with other forms of aggression/antisocial behavior. Two large samples of university students (N = 713 and 633, respectively) completed a series of questionnaires and in some cases, an additional experience sampling study. Results revealed that, in emerging adulthood, DA appears to have a unique demographic profile relative to the other forms of aggression and antisocial behavior. Results further suggested that, when examined simultaneously, only social aggression and non‐aggressive rule‐breaking evidenced independent associations with DA. These associations persisted even in the absence of social media use. Unique associations with most individual difference variables dissipated once we controlled for social aggression and rule‐breaking, although DA was independently associated with extraversion and alcohol use problems. Such findings begin to embed DA in its broader nomological network and suggest clear functional links with both social aggression and non‐aggressive rule‐breaking.

     

A prospective study of the distribution of illness within the menstrual cycle

The cyclic physiological variations during the menstrual cycle are thought to be associated with change in emotional state, in susceptibility to illness, and in frequency of illness-related behavior. Variations in frequency of illness with the phases of the menstrual cycle were examined using data from a 3-year prospective study of social and psychological antecedents of viral illness in 94 student nurses. Reported illnesses, accidents, medical consultations, and hospital admissions were randomly distributed throughout the menstrual cycle. Subjects took more medication on the 1st day of menses than on any other day of the cycle; howeverreported menstrual symptoms were infrequent, with only 4% of the population reporting two or more such episodes. It was concluded that there was an increase in discomfort on the data of onset of menses which was self-medicated but not defined as illness. There was no discernible relationship of illness or disability to any phase of the cycle.This work was supported in part by Center for Oral Health Research (COHR) grant DEO 2116, and Oral Medicine Training Grant ST01-DE-77. The authors wish to recognize the contribution of Carol Ram, R. N., who was the administrator of this study and responsible for the collection and organization of the large bank of information from which the material for this paper was abstracted. Without her care, diligence, and intelligent management, this study could not have been completed. We also wish to acknowledge the consultive advice of Dr. Larry Laster, Director, Division of Biometrics, School of Dental Medicine, in choice of analytic techniques, and the help of Dr. Arthur Segal in the early stages of data analysis.     

Maternal aggression in mice and rats towards male and female conspecifics

Although postpartum aggression is primarily studied in laboratory mice and rats, it is unclear how the two species compare in terms of the factors associated with peak levels of aggressive behavior. Using the same experimental protocol, we assessed the relative effect of intruder sex and time since parturition on the frequency of maternal aggression in Long-Evans rats and CFW mice. Females were studied for 2 consecutive cycles of pregnancy and lactation. During the first lactation, aggression was tested 2 times per week for 3 weeks in order to select animals that attacked at least once. During the second lactation, both pup care and aggressive behavior were assessed in detail. Testing occurred twice in each lactation week, with postpartum days 1–7, 8–14, and 15–21 considered weeks 1, 2, and 3, respectively. Maternal behavior towards 3 pups was observed for 5 minutes, followed by a confrontation with an intruder. Lactating females encountered female intruders once per week, and male intruders in the alternate weekly test. The same behaviors were measured in the 2 species, except for the tail rattle exhibited by mice and the aggressive posture shown by rats. Lactating rats and mice show similar decreases in pup care behavior as lactation progresses in time; yet the factors associated with peak levels of aggression differ between species. In Long-Evans rats, female intruders receive more attacks, threats, and aggressive postures than males. Frequency of attack bite and sideways threat declines in each passing week of lactation. Lactating mice are more aggressive toward male intruders throughout the lactation period. Mice still attack and threaten during the third week of lactation, but less often in comparison to the first week. Therefore, peak levels of aggression vary in mice and rats both as a function of intruder sex and lactation week.     

Effects of peer reporting on cooperative play and aggression of kindergarten children

Kindergarten children were given opportunities to report to their class during “sharing time” the cooperative or friendly behaviors of their peers which had occurred during the day. Children whose cooperative behavior was reported by a peer received a happy face badge as a reward. Later, only peer praise served as a reward for those whose friendliness was mentioned by a peer. Cooperative behavior increased and aggressive acts decreased when peers reported prosocial behavior to the class. A reversal phase, in which unfriendly acts were reported, produced a decrease in cooperation and an increase in aggression. Peer reporting was a natural and inexpensive means of increasing prosocial responses of these children. Anecdotal teacher reports suggested a generalized behavioral improvement.     

Exposure to violent video games and aggression in German adolescents: a longitudinal analysis

The relationship between exposure to violent electronic games and aggressive cognitions and behavior was examined in a longitudinal study. A total of 295 German adolescents completed the measures of violent video game usage, endorsement of aggressive norms, hostile attribution bias, and physical as well as indirect/relational aggression cross‐sectionally, and a subsample of N=143 was measured again 30 months later. Cross‐sectional results at T1 showed a direct relationship between violent game usage and aggressive norms, and an indirect link to hostile attribution bias through aggressive norms. In combination, exposure to game violence, normative beliefs, and hostile attribution bias predicted physical and indirect/relational aggression. Longitudinal analyses using path analysis showed that violence exposure at T1 predicted physical (but not indirect/relational) aggression 30 months later, whereas aggression at T1 was unrelated to later video game use. Exposure to violent games at T1 influenced physical (but not indirect/relational) aggression at T2 via an increase of aggressive norms and hostile attribution bias. The findings are discussed in relation to social‐cognitive explanations of long‐term effects of media violence on aggression. Aggr. Behav. 35:75–89, 2009. © 2008 Wiley‐Liss, Inc.     

Behavioral correlates of learned aggression in male mice

The aims of this paper are to study the aggressive behavior in male mice with consecutive experience of victories in 2, 10, and 20 days (T2, T10, and T20 winners) of daily agonistic confrontations under the sensory contact model and to determine the most probable behavioral domains that should be used as animal models for learned aggression in humans. It has been shown that the structure of winners' behavior changes from test to test: the attacking behavior prevailed (81% of the total time) in the behavior of T2 winners. Attacks and diggings (herein: digging up and scattering the litter on the partner' territory) prevailed in the behavior of T10 winners (each approximately 40%). T20 winners demonstrated aggressive grooming half of the testing time and digging behavior 25% of the time. Correlational analysis revealed that the number of significant correlations between the behavioral domains (attacking, digging, aggressive grooming, self‐grooming, threats, rotations) and between different behavioral parameters (latency, number, total and average time) of one behavioral domain are growing from the second test to twentieth test, and the relationships between the behavioral domains change qualitatively. The following may be regarded as elements of learned aggression in male mice: (1) appearance of aggressive grooming instead of the intensive attacking behavior and (2) involvement of the digging behavior in the hostile behavior together with the threats and attacking behavior. Negative correlations between parameters of the behavioral domains may testify to the replacement of one behavioral pattern by another and reflect learned behavior. Positive correlations between certain behavioral domains may reflect the formation of a common motivational background for the winners' behavior. Aggr. Behav. 26:386–400, 2000. © 2000 Wiley‐Liss, Inc.