Aim of this research is to analyze motivation and verbal aggressiveness as structure of relations and to detect their determinants. A university class of 62 students and 4 instructors has been analyzed as a network. In-and out-degree, degree, pagerank, katz and authority have been calculated. They were correlated (Spearman test) with several non-network variables such as economic status, age, gender, etc. Visone and SPSS have been used. Main results are the following: Mastery influence is a more common situation than influence aiming at performance and verbal aggressiveness which necessitate fanaticism or familiarity. Students with high grade are quite central in influencing and being influenced for learning pedagogic-psychological issues. In the case of learning biology (mastery), the teaching staff is the main stimulator in contrast to case of pedagogic-psychological field. The age and the experience of travelling abroad are also conducive to learning biology. Male students seem to be more influential than the female ones, as the sport is still perceived as a male-dominated field. Students interested in medicinal subjects are rather unable to stimulate others in sport issues, as there is a contextual deficit between medicinal and sport subjects. Female students seem to stimulate for improvement. Students interested in the medicinal subjects tend to be stimulated and to stimulate others to surpass performance limits. The desire for professional eminence also seems to discourage offenders indicating the existence of organization culture at the department. Travelling abroad for sport reasons increases offensiveness. Students originating from rural areas tend more to become target of offenses, indicating thus spatial-regional discrimination. Students of higher economic state are more deriding. The proposed typologies of motivation influence and verbal aggressiveness include the "invulnerable motivator" and the "vulnerable motivator" as well as the "strong motivator" and the "brawler" type.

Aim of this research is the detection of aggressive communication parameters and typology. A network sample of 62 students (male = 32, female = 30) and 4 instructors (male = 2, female = 2) at the physical education and sport sciences dept. at the University of Thessaly has been collected in 2016. A standardized questionnaire consisting of network and non-network part was used. Social network analysis (algebraic analysis) combined with conventional statistics has been used. Basic results are the following ones: Persons dedicated to sport appear to target others and be targeted. Dedication to study content is proved to play a role of a refuge against criticism. High grade and ambition seem to protect against negative comments. Physical qualification (tallness) seems also to discourage rudeness. Spatial-regional discrimination is also revealed. Mockery seems to be even a cause of absence from the courses. A superiorityinduced aggressiveness (on economic basis) has been detected. Threat may be regarded as a behavioral extension of mockery (or inversely). In the course of study time, more aggressive persons emerge who even threat others. High grade students are unattractive for arguing. Internet seems to develop communication stimuli. The tendency for professional distinction is connected with arguing. Younger students show an integration deficit in terms of argumentation. Communicational types (three profiles of targets: "depreciated assaulted", "attractive", "repellent", and two profiles of general involvement: "lively", "controversial") have emerged. A typology of targets is depicting a sharper fragmentation than a typology of general involvement (targeted and acting).

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This study is aiming at examining 1) physical education teachers' self-perceived verbal aggressiveness and argumentativeness, 2) students' perceptions about verbal aggressiveness and argumentativeness developed by their teachers, in order to assess the communicational accordance between students' and teachers' perceptions in elementary, junior and high schools. A combination of qualitative (study 1) and quantitative methods (study 2) has been implemented for this purpose. Fifteen PE teachers (6 females and 9 males), participated in the qualitative study; and 894 students (442 males, 452 females), participated in the quantitative study. According to the study 1, argumentativeness and verbal aggressiveness are features that co-exist to a person's behavior.

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