Handedness is the most obvious expression of lateralized behaviour in humans. However, there is only limited knowledge about other forms of lateralized behaviour, e.g. preferential use of an eye and whether these may correlate with handedness. Thus to investigate this, 100 subjects (50 males and 50 females) between 11 and 80 years of age were assessed for their eye preference, eye dominance, visual acuity, and handedness. Eye preference was assessed by performing four different monocular tasks, eye dominance by performing the binocular Dolman test, visual acuity was assessed with a Snellen chart and handedness was surveyed using the Edinburgh Handedness Inventory. Regarding eye preference, the right eye was preferred by 69% of the subjects. 90 % of the subjects were consistent for their preferred eye across all four tasks. 66% of the subjects had a dominant right eye, 33% had left eye dominance and 1% could not be assessed using the Dolman test. 56% of the subjects differed in their visual acuity between both eyes, while 43% had the same visual acuity in both of their eyes. 86% of the subjects were right-handed while 4% were left handed and 10% were ambidextrous. Significant correlations were found between visual acuity and eye preference and between visual acuity and eye dominance. The study also found a positive correlation between handedness and eye preference. These results support the notion that there is a weak correlation between the different aspects of lateralized behaviour in humans.

This study investigated the individual power of teachers as subordinates in elementary schools. It focused on the informal social structure in "good" elementary schools and the roles played by principals, teachers who held formal governance positions, itinerant teachers, and participants in the district's career ladder pilot program. Roles sampled were (1) providers of moral support, (2) sources of teaching expertise, (3) dispensers of procedural information, and (4) those able to "get things done" in the school. Peer and principal dependency data were also collected. Teachers and principals in five elementary schools in a single school district were sampled twice in a two year period. Findings were: (1) Although "good" principals received high total scores for providing resources to the faculty, there were instances when individual teachers scored as high or higher than the principal. (2) Faculty and principals depended on providers of moral support more than they depended on any of the traditionally power-producing roles. (3) Teachers depended on peers mostly for moral support, less for teaching expertise and "getting things done," and least for information. Teachers depended on the principal for moral support and information, less for "getting things done," and least for teaching expertise. (4) Full-time classroom teachers and specialists were most active in the social structure. Part-time teachers, itinerant teachers, and special services personnel, such as psychologists, speech/language pathologists, etc., were not key participants. Some full-time teachers, such as fine arts, physical education, and self-contained special education teachers were less active. (5) Teachers holding formal governance positions in the school established or gained influence while holding the formal positions, and they apparently did not lose influence the year after leaving the positions. Formal positions were held by full-time classroom teachers and only occasionally by a specialist. (6) Career ladder candidates or participants established or gained influence in the school's social structure during the career ladder process. Itinerant teachers and individuals who teach specialized curricula were more active in the career ladder program than they were in the school governance network.

The concept of level of aspiration bears directly on goal setting behavior; it is a convenient and important variable in understanding human motivation in a variety of situations. Thus it was the purpose of this study to investigate the relationships between levels of aspiration and the psychological needs of achievement, dominance, autonomy, change, and aggression.

The purposes of the study were to determine (1) the effect which exercise of the nondominant arm would have upon the reaction-movement time of the dominant and nondominant arms, (2) the degree to which fatigue transfers from one arm to the other arm, and (3) the influence of lateral dominance upon the reaction-movement time of both the dominant, and nondominant arms.

Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal.

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.

Distinguished ways are used to measure hierarchical rank between partners in surveys. Aim of this thesis was to study preference for partner of particular hierarchical rank towards respondent 1) according to rating of photographs, 2) according to respondent's ideas about his/her future partnership organization, 3) according to respondent's natural tendency to lead or to yield, and to compare these ways of preference assessment. Questionnaires from 95 female university students aged to 25 years inc. were processed. Respondents, who claimed they will submit their partner or they will take turns in subordination with their partner half and half, were more submissive in ordinary life than respondents, who claimed they will be equal to their partner. Expected connection between idea about future partnership organization or submissiveness in ordinary life and choice of photograph depicting figurant with particular signs of nonverbal dominance was not found. Nevertheless, differences in choices of photographs were found between females using hormonal contraceptives and females not using any hormonal contraceptives. Key words: mate-choice, dominance, submissiveness, attractiveness.

! Title of thesis : Influence of laterality in somatognostic functions of floorball players Demarcation of the issue : This thesis is dedicated to the influence of laterality in somatognostic functions of floorball players and it rates relation between these two phenomenons. It is a first research in this branch and sport, also, it informs about the coherence of these two phenomenons, from the point of view as a cause of sports injuries and also as a prevention of sports injuries. Justification : Athletes get injured frequently in many different situations. Often, we are dealing with an injury as a consequence, but not the real cause. Physical therapist should get oriented in this problematics to be more effective in the healing process of the athlete. To avoid such problems in adulthood, we should be more focused on the prevention just at the beginning of a sports career of a small athlete. No matter what sports level the athlete had achieved, we are focusing especially in one-sided sport activities. Aim of the thesis : The aim of thesis is to find out any coherence of the effect of one-sided sports, as floorball, to somatognostic functions of players at the age between 6 - 14 years old. Methodology of the thesis : Research is created in a form of descriptive - associative academic method. It is...

M.A. (Psychology) / The motivation for this research arose from the fact that very little if any empirical research has been done in connection with the cognitive abilities of persons with right hemispheric language representation. Knowledge of the structural and functional correlates of hemispheric asymmetry has thus far been obtained primarily from people with left hemispheric language representation. A further motivation was that the existing knowledge about hemispheric asymmetry has been obtained mainly from studies of patients with brain damage...

O experimento 1 objetivou estabelecer um modelo de estudo do desvio folicular, permitindo identificar o momento exato do início do desvio. Vacas das raças Nelore (NEL; n=11) e Holandês (HPB; n=10) tiveram emergência da onda folicular ovariana sincronizada e avaliação ultrassonográfica ovariana realizada a cada 12 h. Quando o maior folículo (F1) atingiu tamanho médio de início do desvio para sua raça (NEL: 6,5; HPB: 8,5 mm), em crossover, foram aleatorizadas em dois grupos (CON: Controle; ASP: Aspiração), com aspiração do F1 ASP e nas vacas do grupo CON não houve aspiração. Avaliações ultrassonográficas foram mantidas até 48h pós-desvio. Os dados foram analisados pelo PROC MIXED (P<=0,05). No grupo CON,12h após F1 atingir tamanho de desvio, diferiu em diâmetro com os demais (F2/F3), caracterizando desvio. Não foi observada diferença entre F1 na aspiração e F2 12h após, no grupo ASP nas duas raças. Não houve diferença entre F1 CON com F2 ASP após aspiração do F1. Todavia, F2 ASP apresentou maior diâmetro em relação ao F2 CON a partir de 12h após o momento do desvio, em ambas as raças. Foi realizada colheita de sangue em 0, 3, 6, 12 e 24h após aspiração, para avaliação da concentração plasmática de FSH e aumentou em 12h após aspiração do F1 ASP. O experimento 2, objetivou verificar expressão de genes associados ao desvio, CYP19A1 (Aromatase), receptor de LH (LHr) e PAPP-A (Pappalysin 1) em vacas NEL utilizando o mesmo modelo do experimento 1, entretanto obtendo células da granulosa por meio de lavagem intrafolicular. As vacas (n=10) tiveram emergência da onda sincronizada. Foram estabelecidos três tratamentos: 0h, o maior folículo atingiu 6,5 mm, e os dois maiores folículos foram aspirados (FD0h; FS0h); 12h, os dois maiores folículos (FD12h; FS12h) foram aspirados 12h após o maior atingir 6,5 mm; e grupo desvio, o maior folículo (FD0h) foi aspirado quando atingiu 6,5 mm, e o segundo maior (FS->FD) 12h depois. A suspensão contendo células da granulosa, foi centrifugada, o sobrenadante dosado para estradiol-17&beta; (E2) por ELISA. O pellet foi analisado para expressão de RNAm. Análise estatística foi realizada pelo PROC MIXED do SAS. Concentração de E2 (ng/mL) para FS->FD diferiu do FS0h e FS12h e não diferiu de FD0h e FD12h comprovando que FS->FD na ausência de um FD0h aumenta sua concentração de E2 semelhante aos folículos dominantes. Não houve diferença entre os grupos para a expressão relativa para PAPP-A e CYP19A1. Para LHr, houve tendência de aumento na expressão nos folículos FS->FD, quando comparados ao do grupo 0h. Não houve diferença entre FS->FD e o grupo 12h. FD12h diferiu do grupo 0h (FD0h e FS0h) e FS12h. Conclui-se que, o segundo maior folículo é capaz de se tornar dominante quando se aspira o maior folículo permitindo que se tenha estimativa mais segura do momento exato da dominância; também, ocorre um aumento no FSH plasmático 12h após a aspiração do maior folículo. O aumento na expressão de LHr foi o principal fator para o estabelecimento do desvio em vacas NEL. / This study was conducted in two experiments. Experiment 1 aimed to establish a manipulative model to study follicle deviation. Nelore (NEL n=11) and Holstein (HOL n=10) cows had the emergence of the wave synchronized. Ovarian ultrasonography was performed every 12h. When largest follicle (F1) reached the average size of deviation to its breed (NEL: 6.5; HOL: 8.5 mm), cows were randomized into two groups (CON: control; ASP: Aspiration) in a crossover design. F1ASP was aspirated, and for cows of CON group there was no aspiration. Ultrasound exams were maintained through 48h post-deviation. Data were analyzed using PROC MIXED (P<=0.05). In the CON group, 12h after F1 has reached deviation size, there was difference in diameter in relation to F2 and F3, characterizing deviation. There was no difference between diameters of F1 at the time of aspiration and F2 12h after in the ASP group for both breeds. There was no difference between the F1 from CON group with F2 ASP group after F1 aspiration. However, F2ASP had a bigger diameter compared to the CON group F2 12h after the time of deviation in both breeds. Blood samples were collected at 0, 3, 6, 12 and 24h after aspiration, to evaluate plasma concentrations of FSH. FSH increased at 12h after the F1 aspiration in ASP group. Experiment 2 was conducted to verify the expression of genes associated with follicle deviation, CYP19A1 (aromatase), LH receptor (LHR) and PAPP-A (Pappalysin 1) in NEL cows using same model of experiment 1, however by obtaining granulosa cells through intrafollicular flushing. Cows (n=10) had the wave emergence synchronized. Three treatments were established: 0h, when the biggest follicle reached 6.5 mm, the two biggest follicles were aspirated (DF0h; SF0h); 12h, the two biggest follicles (DF12h; SF12h) were aspirated 12h after the biggest follicle had reached 6.5 mm; and deviation group, biggest follicle (DF0h) was aspirated when reached 6.5 mm, and the second biggest follicle (SF->DF) was aspirated 12h later. The follicular fluid granulosa cells was centrifuged and supernatant was assayed for 17&beta;-estradiol (E2) concentration by ELISA. The pellet was analyzed for mRNA expression. Statistical analysis was performed using the SAS PROC MIXED. Concentration of E2 (ng/mL) for SF->DF differed from SF0h and SF12h and did not differ from DF0h and DF12h showing that SF->DF in the absence of a DF0h had an increased concentration of E2 similar to dominant follicles. There was no difference between groups for the relative expression of mRNA for PAPP-A and CYP19A1. For LHr expression, there was a tendency to increase in SF->DF follicles when compared to the group 0h. There was no difference between SF->DF and group 12h. DF12h differed from group 0h (DF0h/SF0h) and SF12h. In conclusion, second biggest follicle can become dominant when the biggest follicle is aspirated, allowing to have more reliable estimation of the exact moment of follicle deviation, associated with an increase in plasma FSH 12h after aspiration of the biggest follicle. Increased expression of LHr was the main characteristic of establishment of deviation in NEL cows.