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Análise fatorial confirmatória do Exercise Motivation Inventory-2 (EMI-2) e validação de uma versão reduzida
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Advisor(s)
Abstract(s)
Resumo geral
Esta tese centra-se na validação de instrumentos para análise dos motivos para a prática de
exercício físico e divide-se em dois estudos com um seguimento lógico de organização entre eles.
O primeiro estudo centra-se na necessidade de validação do Exercise Motivation Invetory 2,
onde é elaborada uma Análise Fatorial Confirmatória que pretende determinar se este questionário
preenche todos os requisitos para que possa ser aplicado na população portuguesa. Para que este
processo se pudesse suceder foi necessário recorrer a utilização de programas específicos e a
procedimentos estatísticos avançados específicos numa amostra bastante larga.
No seguimento do primeiro estudo, surge o segundo estudo que pretende fazer uma redução
do EMI-2p. Visto que o instrumento se encontra validado, ocorre uma nova preocupação, o fato deste
ter um vasto número de itens cria, assim, a necessidade selecionar os itens com pesos fatoriais mais
fortes dentro dos catorze fatores, fazendo assim com que a estrutura original se mantenha. Este
processo foi possível através de uma Análise Fatorial Exploratória, para que se pudesse elaborar a
distribuição dos itens por novos fatores, e uma Análise Fatorial Confirmatória, com intuito de
confirmar esta nova versão.
A partir dos resultados obtidos foi possível validar o instrumento de medida para a população
portuguesa bem como uma versão reduzida do EMI-2p.
General Abstract This thesis focuses on the validation of tools for analysis of the reasons for the practice of physical exercise and it is divided in two studies with a logical continuation of organization among them. The first study focuses on the need for validation of the Exercise Motivation Invetory 2, which is drafting a Confirmatory Factor Analysis which aims to determine whether this questionnaire meets all the requirements for it to be applied in the Portuguese population. For this process could succeed was necessary to resort to the use of specific programs and specific advanced statistical procedures in a fairly large sample. Following the first study, the second study arises you want to make a reduction of EMI-2p. Since the instrument is valid, a new concern is the fact that these have a large number of items thus creates the need to select items factor weights within fourteen strongest factors, thereby making the original structure remains . This process was made possible through an exploratory factor analysis, so that one could draw the distribution of items by new factors, and a Confirmatory Factor Analysis, in order to confirm this new version. From these results it was possible to validate the measurement instrument for the Portuguese population as well as a reduced version of the EMI-2p
General Abstract This thesis focuses on the validation of tools for analysis of the reasons for the practice of physical exercise and it is divided in two studies with a logical continuation of organization among them. The first study focuses on the need for validation of the Exercise Motivation Invetory 2, which is drafting a Confirmatory Factor Analysis which aims to determine whether this questionnaire meets all the requirements for it to be applied in the Portuguese population. For this process could succeed was necessary to resort to the use of specific programs and specific advanced statistical procedures in a fairly large sample. Following the first study, the second study arises you want to make a reduction of EMI-2p. Since the instrument is valid, a new concern is the fact that these have a large number of items thus creates the need to select items factor weights within fourteen strongest factors, thereby making the original structure remains . This process was made possible through an exploratory factor analysis, so that one could draw the distribution of items by new factors, and a Confirmatory Factor Analysis, in order to confirm this new version. From these results it was possible to validate the measurement instrument for the Portuguese population as well as a reduced version of the EMI-2p
Description
Projeto de Investigação apresentado para a obtenção do grau de Mestre em Psicologia do Desporto e do Exercício
Keywords
Exercise Motivation Inventory-2 (EMI-2) Análise Validação