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Propriedades psicométricas de uma escala de autoeficácia para a prática de atividade física em adultos brasileiros

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Date
2011
Author
Rech, Cassiano Ricardo
Sarabia, Tais Taiana
Fermino, Rogério César
Hallal, Pedro Curi
Reis, Rodrigo Siqueira
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Abstract
OBJETIVO: Verificar a validade e a fidedignidade de uma escala de autoeficácia para a prática de atividade física (AF) em adultos brasileiros. MÉTODOS: A escala de autoeficácia foi aplicada juntamente com um questionário multidimensional face a face em 1 418 indivíduos (63,4 por cento mulheres) com idade > 18 anos. O instrumento foi submetido à análise de validade (fatorial e construto) e fidedignidade (consistência interna e estabilidade temporal). O procedimento de teste-reteste foi aplicado em 74 indivíduos para verificar a estabilidade temporal do instrumento. RESULTADOS: A análise fatorial exploratória apresentou dois fatores distintos: autoeficácia para a prática de caminhada e autoeficácia para a prática de AF moderada e vigorosa (AFMV). Ambos os fatores explicaram 65,4 por cento da variância total da escala (20,9 e 44,5 por cento para caminhada e AFMV, respectivamente). Foram obtidos valores de α = 0,83 (caminhada) e 0,90 (AFMV), que indicam elevada consistência interna. Ambos os fatores da escala apresentaram correlação positiva e significativa (rho > 0,17; P 0,001) com os indicadores de qualidade de vida (percepção de saúde, satisfação pessoal e disposição para as atividades diárias), indicando a adequada validade de construto do instrumento. CONCLUSÕES: A escala aplicada apresenta validade, consistência interna e reprodutibilidade adequadas para avaliar a autoeficácia para a prática de AF em adultos brasileiros.(AU)
 
OBJECTIVE: To test the validity and reliability of a self-efficacy scale for physical activity (PA) in Brazilian adults. METHODS: A self-efficacy scale was applied jointly with a multidimensional questionnaire through face-to-face interviews with 1418 individuals (63.4 percent women) aged > 18 years. The scale was submitted to validity (factorial and construct) and reliability analysis (internal consistency and temporal stability). A test-retest procedure was conducted with 74 individuals to evaluate temporal stability. RESULTS: Exploratory factor analyses revealed two independent factors: self-efficacy for walking and self-efficacy for moderate and vigorous PA (MVPA). Together, these two factors explained 65.4 percent of the total variance of the scale (20.9 percent and 44.5 percent for walking and MVPA, respectively). Cronbach's alpha values were 0.83 for walking and 0.90 for MVPA, indicating high internal consistency. Both factors were significantly and positively correlated (rho > 0.17, P 0.001) with quality of life indicators (health perception, self-satisfaction, and energy for daily activities), indicating an adequate construct validity. CONCLUSIONS: The scale's validity, internal consistency, and reliability were adequate to evaluate self-efficacy for PA in Brazilian adults.(AU)
 
Series
Rev Panam Salud Publica;29(4),abr. 2011
Subject
Atividade Motora; Exercício; Psicometria; Auto-eficácia; Brasil; Motor Activity; Exercise; Psychometrics; Self-efficacy; Brazil; Atividade Motora; Psicometria; Autoeficácia; Brasil; Questionários; Reprodutibilidade dos Testes
URI
http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892011000400007
https://iris.paho.org/handle/10665.2/9541
Citation
Rech, Cassiano Ricardo,Sarabia, Tais Taiana,Fermino, Rogério César,Hallal, Pedro Curi,Reis, Rodrigo Siqueira (2011) Propriedades psicométricas de uma escala de autoeficácia para a prática de atividade física em adultos brasileiros. Rev Panam Salud Publica;29(4) 259-266,abr. 2011. Retrieved from http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892011000400007
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  • Pan American Journal of Public Health

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