Jogos de Computador Violentos e seus Efeitos na Hostilidade, Ansiedade e Activação Fisiológica

Revista Lusófona de Ciências da Mente e do Comportamento

Relationship between antropometric, corporal composition and performance in young swimmers, boys and girls

The young athlete is physiologically unique from the adult and must be considered differently. The growth and development of their bones, muscles, nerves, and organs largely dictate their physiological and performance capacities (Bar–Or, 1983; Costill & Wilmore, 1994; Stager et al., 2008). Swimming performance, and the required times to reach a competition (TAC), shoud look for those diferences and should be compatibles with them.

A System Dynamics-Based Simulation Experiment for Testing Mental Model and Performance Effects of Using the Balanced Scorecard

This study develops a theoretical model that explains the effectiveness of the balanced scorecard approach by means of a system dynamics and feedback learning perspective. Presumably, the balanced scorecard leads to a better understanding of context, allowing managers to externalize and improve their mental models. We present a set of hypotheses about the influence of the balanced scorecard approach on mental models and performance. A test based on a simulation experiment that uses a system dynamics model is performed. The experiment included three types of parameters: financial indicators; balanced scorecard indicators; and balanced scorecard indicators with the aid of a strategy map review. Two out of the three hypotheses were confirmed. It was concluded that a strategy map review positively influences mental model similarity, and mental model similarity positively influences performance.

Modeling the Diffusion of Energy Performance Contracting

The Portuguese Energy Policy considers the development of a commercially viable and competitive market for energy performance contracting (EPC) as a main mechanism to achieve the objectives of energy efficiency improvement. This paper proposes a study to investigate how to achieve widespread adoption of energy performance contracting by means of system dynamics modelling and simulation. To explore and gather insights on this question, a system dynamics model representing the system of the Portuguese EPC market at industry level will be created. The simulation of that model will provide a helpful basis for analysing and explaining the development of key variables, and accelerating learning on the managerial, organizational and political adaptation processes that foster the diffusion of EPC adoption. The first phase of this research project aims at identifying and analysing the key factors and critical cause-effect relations that drive the adoption of EPC. With this purpose, a qualitative content analysis on relevant documents was performed and a set of interviews was conducted. That data was analysed to capture the critical variables and its interrelation to formulate a preliminary representation of the system structure as stock and flow diagrams.

Relações entre ansiedade-estado e ansiedade-traço, sintomas depressivos e sensibilidade ao stresse em puérperas

RESUMO: A Dissertação teve por objectivos comparar e estudar as relações entre os fenómenos psicológicos observados no puerpério, nomeadamente a ansiedade-estado e ansiedade-traço, os sintomas depressivos e a sensibilidade ao stresse. A amostra foi composta de 200 puérperas, com idades compreendidas entre os 18 e os 42 anos (M = 28,88; DP = 5,87), que sabiam ler e falar Língua Portuguesa, possuíam pelo menos quatro anos de escolaridade, residiam em Portugal há mais de um ano e tinham tido um parto de termo. As participantes responderam a um protocolo de avaliação constituído por um Questionário de dados sociodemográficos, um Questionário de dados clínicos e os instrumentos DASS e STAI. Com a DASS pretendia-se avaliar os construtos ansiedade hiperfisológica, depressão e stresse; através da STAI observou-se a ansiedade-traço e ansiedade-estado. Os resultados demonstraram que as primíparas, quando comparadas com as multíparas, possuíam maior ansiedade-estado. Constatou-se que as mulheres que tiveram um parto distócico mostraram mais sensibilidade ao stresse. Também se concluiu que as puérperas que manifestaram patologias médicas durante a gestação apresentaram, no puerpério, ansiedade-traço, sintomas depressivos e sensibilidade ao stresse. Por último, confirmou-se que as mulheres com um trabalho de parto mais longo revelaram maior ansiedade-estado. Espera-se, com esta investigação, contribuir para um maior conhecimento psicológico das puérperas. ABSTRACT: The aims of this Dissertation were to compare and to ascertain the relationships between postpartum psychological phenomena, namely state-anxiety, trait-anxiety, depressive symptoms and stress sensitivity. The sample encompassed 200 puerperas aged 18 to 42 (M = 28,88; SD = 5,87), who were able to read and write in Portuguese, attended at least four years at school, lived in Portugal for at least one year and had a term delivery. Participants were requested to answer an evaluation protocol composed by a sociodemographic Questionnaire, clinical data Questionnaire, DASS and STAI instruments. DASS enabled the evaluation of hyperphysiological anxiety, depression and stress constructs; through STAI state-anxiety and trait-anxiety were scrutinized. Results revealed that primiparas had greater state-anxiety than multiparas. Women who had a dystocic delivery showed increased stress sensitivity. Postpartum women who suffered medical intercurrences during pregnancy exhibited traitanxiety, depressive symptoms and stress sensitivity. Women who underwent protracted labour had greater state-anxiety. This research is expected to attain a greater psychological knowledge regarding postpartum women.