Psychomotor reactions of aggressive and non-aggressive extrovert children

Abstract.— The subjects comprised two, matched, extremely aggressive (experimental ExG and control) groups of twelve 8–year-old boys, and one criterion group of extrovert, well-controlled boys. The ExG was submitted to a treatment of eight lesson? with the aim of making an individual realize non-aggressive, constructive ways of coping with situations. Video-tape recording was used. The results showed that (1) aggressively extrovert children were more impulsive and utilized more space than the constructively extrovert, (2) psychomotor characteristics were more stable over situations than aggressive and constructive coping strategies, and (3) no changes in the psychomotor characteristics of the ExG, attributable to the experimentally induced increase of constructive behaviour and decrease of aggression, could be found. The results were more in favour of the disposition interpretation of expressive movements than of the communication theory of psychomotor expression.     

GENETIC AND SOCIAL CAUSES OF AGGRESSIVE BEHAVIOUR IN MICE

L agerspetz , K irsti . Genetic and social causes of aggressive behaviour in mice. Scand. J. Psychol ., 1961, 2 , 167—-173.—Significant differences in the aggressiveness of mice selected for aggressiveness and non-aggressiveness have been found to occur in the 2nd and 3rd generation of selective breeding. In S _a, motor activity scores were significantly higher in mice of the aggressive than of the non-aggressive strain. Defecation and ambulation scores obtained both in a standardized open-field test and in connection with the aggression measurements showed that the S₃ descendants of the aggressive mice were emotionally less reactive than the members of the 3rd non-aggressive generation. Defeats tend to decrease, victories to increase the level of aggressiveness in mice, but the aggression scores tend to return to the original level after the termination of the experiments.     

STABILIZING ALETHIC PLURALISM

Alethic pluralism is the view that the nature of truth is not uniform across domains. There are several ways of being true (T₁ ... T_n). A simple argument, the 'instability challenge', purports to show that this view is inherently unstable. One can simply say that something is uniformly true if and only if it is T₁ or ... or T_n. Being uniformly true is a single truth property that applies across the board, and so the nature of truth is uniform across domains, contra pluralism. I defend pluralism against the instability challenge. I show that the challenge bifurcates: one challenge is formulated in terms of predicates, and the other is formulated in terms of properties. The pluralist has the resources to defuse both of these. The sparse/abundant property distinction and considerations of explanatory asymmetry play a crucial role in my argument.     

Concurrent and predictive validity of self-reported aggressiveness

The subjects (60 boys) were drawn from the sample of a longitudinal study of social development and represented extremely aggressive, anxious, constructive, and submissive behaviour at the age of 8. They were presented with three question series concerning (1) their responses to aggressive attacks; (2) reactions in frustration situations presented in short stories; and (3) their aggressive initiatives. In each series the type of aggressive behaviour, attacker, victim, and other situational factors were systematically varied. In series 2 the type of response, open-ended or forced-choice, was also varied. The results showed that the most valid way of studying boys' self-observations on their aggressive behaviour was to ask if they attack somebody without a specific reason (series 3). This correlated with contemporaneous overt aggression at the age of 8 and predicted aggressiveness and various characteristics of antisocial aggressive development at the ages of 14 and 19. Self-observations on one's physical aggression were more valid for ratings of overt aggressiveness than on verbal aggression. The open-ended or forced-choice type of response did not affect the validity of aggressive responses. Of the categories of nonaggression, ‘conciliatory responses’ had the highest concurrent and predictive validity for constructiveness and other indicators of strong self-control.     

Aggression, conflict resolution, popularity, and attitude to school in Russian adolescents

The objective of the present study was to examine the effects of aggression and conflict-managing skills on popularity and attitude to school in Russian adolescents. Three types of aggression (physical, verbal, and indirect), constructive conflict resolution, third-party intervention, withdrawal, and victimization were examined using the Peer-Estimated Conflict Behavior (PECOBE) inventory [Bjorkquist and Osterman, 1998]. Also, all respondents rated peer and self-popularity with same-sex classmates and personal attitude to school. The sample consisted of 212 Russian adolescents (101 boys, 111 girls) aged between 11 and 15 years. The findings attest to significant sex differences in aggression and conflict resolution patterns. Boys scored higher on physical and verbal aggression, and girls on indirect aggression. Girls were socially more skillful than boys in the use of peaceful means of conflict resolution (they scored higher on constructive conflict resolution and third-party intervention). The attributional discrepancy index (ADI) scores were negative for all three types of aggression in both sexes. Verbal aggression is apparently more condemned in boys than in girls. ADI scores were positive for constructive conflict resolution and third-party intervention in both genders, being higher in boys. In girls, verbal aggression was positively correlated with popularity. In both sexes, popularity showed a positive correlation with constructive conflict resolution and third-party intervention, and a negative correlation with withdrawal and victimization. Boys who liked school were popular with same-sex peers and scored higher on constructive conflict resolution. Girls who liked school were less aggressive according to peer rating. They also rated higher on conflict resolution and third-party intervention. Physical aggression was related to age. The results are discussed in a cross-cultural perspective.     

The Role of Relational Aggression in Identifying Aggressive Boys and Girls

Peer perceptions of relational and overt aggression and peer evaluations of social competencies were obtained for 461 boys and 443 girls in second and third grades. In contrast to Crick and Grotpeter (1995), boys obtained higher relational and overt aggression scores than girls, and the relation between both types of aggression and peer evaluations were similar for boys and girls. When controlling for levels of overt aggression, relational aggression made a statistically significant but small contribution to the prediction of both peer-evaluated competencies and teacher ratings of aggression in boys and girls. Analyses treating relational and overt aggression as categorical variables revealed gender differences in the prevalence and corresponding sociometric status of aggressive subtypes. When peer-rated relational aggression status is not considered, 60% of aggressive girls, compared to 7% of aggressive boys, are not identified as aggressive. High levels of overt aggression were more likely to result in peer rejection for girls than for boys. In a subsample of 112 children, peer-rated relational aggression contributed more to the discrimination of teacher-identified aggressive and nonaggressive girls, whereas peer-rated overt aggression contributed more to the discrimination of teacher-identified aggressive and nonaggressive boys.     

An aggression machine: IV. Concurrent and predictive validity over ten years

The subjects (60 boys) were drawn from the sample of a longitudinal study of social development to represent extremely aggressive, anxious, constructive, and submissive patterns of behaviour at the age of 8. A year later they were tested with an aggression machine (PAM). This allows variation of the intensity of both aggressive attack and defence in different stimulus conditions. The intensity of defensive aggression towards different attackers as well as the response style variables, latency, duration, and number of responses were correlated with observed and self-reported data at the ages of 8, 9, 14 and 19. The results showed that the intensity of aggression toward a same-sex peer had the highest validity. Opposite sex and authority figures as attackers called up other associations and motives, such as conflicts with the mother and anxiety. From the response style variables the highest validity was obtained for reaction time. This correlated with constructive behaviour.     

Social Information Processing as a Mediator Between Cognitive Schemas and Aggressive Behavior in Adolescents

This longitudinal investigation assessed whether cognitive schemas of justification of violence, mistrust, and narcissism predicted social information processing (SIP), and SIP in turn predicted aggressive behavior in adolescents. A total of 650 adolescents completed measures of cognitive schemas at Time 1, SIP in ambiguous social scenarios at Time 1 and Time 2, and reactive aggression at Time 1, Time 2, and Time 3 to determine whether SIP measured at Time 2 mediated between the cognitive schemas measured at Time 1 and the aggressive behavior measured at Time 3. The results showed that each schema predicted different SIP components: Justification of violence predicted aggressive response access, narcissism predicted anger and aggressive response access, and mistrust predicted more hostile attributions and less anger. Only the SIP component of aggressive response access was directly associated with reactive aggression. The mediational model was quite similar for boys and girls although some paths, such as the association between aggressive response access and reactive aggression, were higher for boys.     

A note on cue probability learning: what conditioning data reveal about cue contrast

In a probabilistic learning task with two complementary cues (C₁ and C₂) and two events (E₁ and E₂) the subject has a tendency to infer that E₂ will occur when C₂ occurs after he/she has observed that E₁ frequently goes with C₁. This phenomenon was termed cue contrast because it reflects the belief that C₂ contrasts with C₁ and should indicate E₂. Two kinds of predictions following from the notion of cue contrast were tested on response proportions from the first block of trials in four previously published experiments on cue probability learning. Of a total of 15 independent observations (eight within-group comparisons; seven between-group comparisons) 13 confirmed the predictions (sign test, p<0.005). It was concluded that cue utilization is both an inductive process based on association between cues and events and an inferential process based on contrast.     

The role of social‐cognitive abilities in preschoolers' aggressive behaviour

This study investigated the relationship between preschool children's social‐cognitive abilities (theory of mind and social information processing; SIP) and their observed physical and relational aggressive behaviour. Children with more advanced social‐cognitive abilities engaged in fewer acts of physical aggression; however, much of the ability of the social‐cognitive variables to predict physical aggression was shared with language ability. In addition, social‐cognitive understanding moderated the connection between language ability and physical aggression. Exploratory examination of gender differences in patterns of association between physical aggression and the social cognitive understanding variables revealed that the relationships were only true for boys. Relational aggression was not associated with social cognitive ability for either boys or girls, but this is likely due to the low frequency of relationally aggressive behaviour observed in this sample.     

Mitigating aggression and promoting prosocial behavior in aggressive elementary schoolboys

The effects of four school-based interventions designed to decrease children's aggression and promote prosocial behavior were assessed. One hundred and four aggressive boys, ages 8–13, from ‘Behavior Disorder’ classrooms, were assigned to one of four training conditions: cognitive (self-control) training, behavioral (prosocial skills) training, combined cognitive-behavioral training, or attention/play training. School psychologists trained the boys in small groups for 10 1-h sessions. It was hypothesized that training in both cognitive and behavioral competencies would lead to the most behavioral improvement. Results indicated that, according to teacher report, those children receiving the cognitive-behavioral and attention/play interventions improved significantly more than those exposed to cognitive and behavioral training by decreasing their aggression and increasing their prosocial behavior immediately following the intervention. At 6-month follow-up, only those children exposed to the attention/play intervention remained significantly improved.     

网络社会排斥对大学生网络攻击行为及传统攻击行为的影响,疏离感的中介作用

为探讨网络社会排斥、疏离感、大学生网络攻击行为及传统攻击行为间的关系,选取600名大学生为被试,采用网络社会排斥问卷、一般疏离感量表、网络攻击行为量表及大学生攻击行为量表进行测试。结果表明：(1) 网络社会排斥、疏离感、大学生传统攻击行为及网络攻击行为两两之间均呈显著正相关;(2) 网络社会排斥对大学生网络攻击行为和传统攻击行为均具有显著的正向预测作用;(3) 疏离感在网络社会排斥对大学生网络攻击行为和传统攻击行为的影响中均起着部分中介作用。     

网络社会排斥对大学生网络攻击行为及传统攻击行为的影响,疏离感的中介作用

为探讨网络社会排斥、疏离感、大学生网络攻击行为及传统攻击行为间的关系,选取600名大学生为被试,采用网络社会排斥问卷、一般疏离感量表、网络攻击行为量表及大学生攻击行为量表进行测试。结果表明：(1) 网络社会排斥、疏离感、大学生传统攻击行为及网络攻击行为两两之间均呈显著正相关;(2) 网络社会排斥对大学生网络攻击行为和传统攻击行为均具有显著的正向预测作用;(3) 疏离感在网络社会排斥对大学生网络攻击行为和传统攻击行为的影响中均起着部分中介作用。     

Is indirect aggression typical of females? gender differences in aggressiveness in 11- to 12-year-old children

Gender differences regarding aggressive behaviour were investigated in 167 school children, 11 to 12 years of age, through peer-rating techniques supported by self-ratings and interviews. The social structure of the peer groups also was studied. The principal finding was that girls made greater use of indirect means of aggression, whereas the boys tended to employ direct means. Gender differences in verbal aggression were less pronounced. The social structure of peer groups was found to be tighter among girls, making it easier for them to exploit relationships and harm their victims by indirect manipulative aggression. Because indirect aggression has rarely been satisfactorily studied with tests of aggression, this finding may help to explain 1) the generally lower correlation found between peer-rated and self-rated aggression in girls than among boys (indirect means not being so readily recognized by the subject as a kind of aggression) and 2) the low stability of aggressiveness in girls often found in developmental studies.     

The effect of television-mediated aggression and real-life aggression on the behavior of Lebanese children

This study investigated the effect of television-mediated aggression and real-life aggression on the behavior of Lebanese children. The sample consisted of 48 boys and 48 girls of Lebanese origin who were students in an elementary school in Beirut, Lebanon. After controlling for pre-experimental aggression, the subjects were randomly assigned to one of the following treatment conditions: human-film aggression, cartoon-film aggression, neutral film, or real-life (act of war) aggression. The results indicated that boys as a group were more aggressive than girls and exhibited more imitative aggression after viewing both violent film and real-life violence. Girls were not more violent after viewing filmed aggression but were affected by the real-life violence. Comparisons of Bandura's work within the Lebanese culture are made.     

Aggression in boys with attention deficit-hyperactivity disorder: Methylphenidate effects on naturalistically observed aggression,response to provocation,and social information processing

High and low-aggressive boys with attention deficit-hyperactivity disorder (ADHD) were compared and the effects of methylphenidate were examined on measures from three domains of aggression: (1) directly observed verbal and nonverbal aggressive behaviors exhibited in the context of a day treatment program, (2) aggressive responding when provoked during a laboratory task, and (3) social information processing patterns exhibited on tasks designed to tap the putative cognitive components of aggression. The high-aggressive (HA) and low-aggressive (LA) subgroups differed significantly on observational measures of aggression and on the laboratory provocation task, but the HA group showed more deviant cognitions on only one of the numerous measures of social information processing. Regarding medication effects on the direct observation measures, methylphenidate decreased aggression for both subgroups. On the laboratory provocation task, methylphenidate had only minimal effects. Significant drug effects were obtained on only two recall social information processing measures.     

同伴地位对青少年早期不同类型攻击行为发展的影响:性别与班级规范的调节作用

采用同伴提名法,对2470名初二学生进行为期半年的追踪研究,考察两种同伴地位(社会喜好和社会支配)对三种攻击类型(身体、言语和关系攻击)发展的预测,以及性别与班级规范在其中的调节作用。多层线性分析发现:(1)社会喜好负向、社会支配正向预测个体半年后的三类攻击行为,且男生的社会喜好对关系攻击的预测作用强于女生;(2)对于男生而言,身体和言语攻击的班级规范强化个体后续的攻击行为,但关系攻击的班级规范则无显著影响;对于女生而言,身体攻击的班级规范强化个体后续的攻击行为,言语和关系攻击的班级规范强化初始攻击水平低的个体相应的攻击行为、而对于初始攻击水平高的个体表现出弱化效应;(3)班级规范还能调节社会支配对攻击行为的影响,在言语攻击规范高的班级中,社会支配对个体言语攻击的正向预测作用更强。     

An aggression machine II. Interindividual differences in the aggressive defence responses aroused by varying stimulus conditions

PitkÄnen, L. An aggression machine. II. Interindividual differences in the aggressive defence responses aroused by varying stimulus conditions. Scand. J. Psychol., 1973, 14, 65–74.-The subjects, six aggressive and nonaggressive groups of ten 9-year old boys, selected by rating method, were tested with an "aggression machine" (PAM) constructed by the writer. The varying stimulus conditions included two situations of impulsive aggression and six variations of specified attackers. The results showed that (1) the larger part of the variance of the intensity of aggression in the PAM was accounted for by the situational variations than by interindividual differences in coping with thwarting situations as measured by a rating method. (2) The overtly aggressive boys showed strong discrimination between the situations, while the overtly nonaggressive boys were quite insensitive to situational variations. (3) The intensity of aggressive defence towards a boy of the same age correlated most highly with rated aggressiveness. (4) The latency, duration, and number of aggressive responses did not vary as easily as the intensity according to situations.     

Social-information-processing factors in reactive and proactive aggression in children's peer groups

We examined social-information-processing mechanisms (e.g., hostile attributional biases and intention-cue detection deficits) in chronic reactive and proactive aggressive behavior in children's peer groups. In Study 1, a teacher-rating instrument was developed to assess these behaviors in elementary school children (N = 259). Reactive and proactive scales were found to be internally consistent, and factor analyses partially supported convergent and discriminant validities. In Study 2, behavioral correlates of these forms of aggression were examined through assessments by peers (N = 339). Both types of aggression related to social rejection, but only proactively aggressive boys were also viewed as leaders and as having a sense of humor. In Study 3, we hypothesized that reactive aggression (but not proactive aggression) would occur as a function of hostile attributional biases and intention-cue detection deficits. Four groups of socially rejected boys (reactive aggressive, proactive aggressive, reactive-proactive aggressive, and nonaggressive) and a group of average boys were presented with a series of hypothetical videorecorded vignettes depicting provocations by peers and were asked to interpret the intentions of the provocateur (N = 117). Only the two reactive-aggressive groups displayed biases and deficits in interpretations. In Study 4, attributional biases and deficits were found to be positively correlated with the rate of reactive aggression (but not proactive aggression) displayed in free play with peers (N = 127). These studies supported the hypothesis that attributional biases and deficits are related to reactive aggression but not to proactive aggression.     

Estradiol and progesterone in the control of sexual receptivity in female rats

Estradiol (E₂) and progesterone (P) are both required for induction of sexual behavior in female rats under physiological conditions. Administration of E₂ in brief pulses can induce the behavior in ovariectomized rats. P does not normally exert inhibitory or anti-estrogenic effects on the behavior. The decline of sexual receptivity in ovariectomized E₂+P-treated rats is dependent upon the amount of E₂ and P given but independent on the continued presence of either hormone. Ovariectomized animals treated with a constant amount of E₂ show a behavioral rhythm which is disrupted by hypothalamic lesions and it is suggested that peptidergic neurons in the suprachiasmatic nuclei of the hypothalamus rhythmically inhibit the behavior of ovariectomized E₂-treated rats.