Pierre Valois

Development and validation of a brief version of the Dyadic adjustment scale with a nonparametric item analysis model

The main purpose of the current research was to develop an abbreviated form of the Dyadic Adjustment Scale (DAS) with nonparametric item response theory. The authors conducted 5 studies, with a total participation of 8,256 married or cohabiting individuals. Results showed that the item characteristic curves behaved in a monotonically increasing function for all items of the brief 4-item version of the DAS (DAS-4). The DAS-4 proved to be informative at all levels of couple satisfaction. Compared with the 32-item version of the DAS (DAS-32), it was as effective in predicting couple dissolution and was significantly less contaminated by socially desirable responding. In addition, structural equation modeling demonstrated that the underlying latent construct measured by the DAS-4 was very stable over a 2-year period. This brief version has the advantage of being less time consuming and constitutes a promising alternative to the original DAS-32 for clinicians and researchers.

The pattern of influence of perceived behavioral control upon exercising behavior: an application of Ajzen's theory of planned behavior

The aim of the present studies was to verify the basic assumptions underlying the theory of planned behavior for the prediction of exercising intentions and behavior among adults of the general population (study 1) and a group of pregnant women (study 2). In both studies, baseline data were collected at home with trained interviewers and with the use of paper-and-pencil questionnaires. The self-report on behavior was obtained 6 months (study 1) and between 8 and 9 months (study 2) after baseline data collection. In study 1, perceived behavioral control influenced behavior only through intention. In study 2, none of the Ajzen model variables was associated to exercising behavior. Nonetheless, intention was influenced by attitude, habit, and perceived behavioral control. The results of the present studies suggest that perceived behavioral control contributes to the understanding of intentions to exercise but not to the prediction of exercising behavior.

A comparison of the Fishbein and Ajzen and the Triandis attitudinal models for the prediction of exercise intention and behavior.

The main purpose of the study was to compare the efficiency of the Fishbein and Ajzen and the Triandis models to predict (1) the intention to participate regularly in some physical activities during free time within a 3-week period and (2) the exercise behavior within these 3 weeks among a group of 166 subjects, aged 22 to 65 years. Our results show that the Triandis model was as efficient as the Fishbein and Ajzen model in predicting the exercise behavior. However, the results obtained from the Triandis model demonstrate the importance of the habit of exercising in predicting the exercise behavior. Moreover, the Triandis model was superior to the Fishbein and Ajzen model in explaining behavioral intention. Of particular interest was the salience of the affective, social, and personal belief components of the Triandis model. In addition, from a practical perspective, this comparative study showed that (1) to exercise regularly is perceived as hard work, and (2) individuals believe that it is their own responsibility to exercise or not to exercise.

Prediction of leisure-time exercise behavior: a path analysis (LISREL V) model.

In an attempt to understand the inherent process underlying the regular practice of physical activity, the relationships among subjective norm, attitude, habit, intention, and future behaviors have been investigated in a random sample of 136 University of Toronto employees. For this purpose, leisure-time exercise behavior was measured on two occasions after a statement of intentions had been obtained: (1) 3 weeks later (proximal behavior) and (2) 2 months later (distal behavior). The results of a path analysis (LISREL) suggest that (1) intention is directly influenced by habit and attitude, (2) proximal behavior is the result of habit only, and (3) distal behavior can be explained by a combination of intention and proximal behavior. Subjective norm was not a significant predictor of intention, proximal behavior, or distal behavior. This modeling approach offers a clearer understanding of the dynamics of exercise intention and behavior, strongly supporting the role of habit as a determinant of exercise behavior.

Differences in Perceived Barriers to Exercise Between High and Low Intenders: Observations Among Different Populations

Purpose. The goal of this study was to describe the salient perceived barriers to exercise in three different groups and to examine the perceived barriers characterizing individuals with a high or a low intention to exercise in the context of the theory of planned behavior. Design. Cross-sectional studies relating perceived barriers and intention to exercise were utilized. Subjects. Three independent samples were used: general population (n=349), individuals who have suffered from coronary heart disease (n=162), and pregnant women (n=139). Measures. Firstly, standard elicitation procedures were applied to identify the particular perceived barriers characterizing each population. Then, three self-administered questionnaires, one per sample, were used to measure perceived barriers and intention to exercise. Results. MANOVA analyses contrasting high and low intenders indicated a significant difference in perceived barriers to exercise in two of the three samples: general population (F5,343=6.37, p<.001) and individuals suffering from coronary heart disease (F9,152=2.28, p<.05). Conclusion. The results indicate not only that each population has specific salient perceived barriers to exercise, but also that within each group high and low intenders differ on a number of these perceived barriers. Therefore, it is recommended that the study of perceived barriers to exercise in any population should be based upon a standardized method of measuring these barriers such as the method adopted in the present study.

Prediction of intention to exercise of individuals who have suffered from coronary heart disease

The aim of the study was to understand the intention to exercise of individuals who suffer from CHD. A group of 161 cardiac patients completed a questionnaire that investigated intentions, attitudes, subjective norms, perceived barriers, habits, perceived difficulties, and personal normative beliefs with respect to exercising, as well as perceived severity of and perceived vulnerability to re-infarction. Regression of intention yielded an R2 of .41 (p less than .0001), with perceived barriers, habits, and perceived difficulties as the significant predictors. MANOVA indicated that high and low intenders differed (p less than .01) according to their perception of three barriers: difficulties in time management, difficulties in psychological adaptation, and laziness. These results suggest that new guidelines should be adopted for the development of cardiac rehabilitation exercise programs.

Application of Exploratory Structural Equation Modeling to Evaluate the Academic Motivation Scale

In this research, the authors examined the construct validity of scores of the Academic Motivation Scale using exploratory structural equation modeling. Study 1 and Study 2 involved 1,416 college students and 4,498 high school students, respectively. First, results of both studies indicated that the factor structure tested with exploratory structural equation modeling provides better fit to the data than the one tested with confirmatory factor analysis. Second, the factor structure was gender invariant in the exploratory structural equation modeling framework. Third, the pattern of convergent and divergent correlations among Academic Motivation Scale factors was more in line with theoretical expectations when computed with exploratory structural equation modeling rather than confirmatory factor analysis. Fourth, the configuration of convergent and divergent correlations connecting each Academic Motivation Scale factors to a validity criterion was more in line with theoretical expectations with exploratory structural equation modeling than with confirmatory factor analysis.

La détresse psychologique dans la population du Québec non institutionnalisée résultats normatifs de l'enquête Santé Québec

Based on the results of the Santé Québec survey, this article describes the normative values of the psychological distress indices developed as part of the Santé Québec survey (IDPESQ-29 and IDPESQ-14) for the reference population as a whole, women and men separately, and for certain age groups.

Risk factors associated with alpine skiing injuries in children. A case-control study.

We investigated the relative contribution of four risk factors to the occurrence of injuries among alpine skiers aged 12 years and younger (3 to 12 years old; mean age, 9.43 years). The risk factors selected were deficient binding adjustment, absence of formal training, low skill level, and use of rented equipment. A group of injured skiers (N 41) and a control group of uninjured skiers (N 313) were recruited among young skiers at one major alpine ski center in the Québec City, Canada, area during the 1995 to 1996 season. No significant group differences were found for mean age or sex distribution. The adjusted odds ratios for injury were 7.54 (95% confidence interval [2.57, 22.15]) for skiers in the low level of skill category relative to highly skilled skiers, 7.14 (2.59, 19.87) for skiers who rented their ski equipment compared with skiers who owned their equipment, and 2.11 (1.02, 4.33) for skiers with ill-adjusted bindings compared with skiers with better-adjusted bindings. Only formal training did not meet the 0.05 significance level for entry into the model; this is probably because of methodologic limitations. Implications of these results for the development of a prevention program aimed at young skiers are discussed.

OPTIMISM AND HEALTH-RELEVANT COGNITIONS AFTER A MYOCARDIAL INFARCTION

The relationship between dispositional optimism (LOT) and health-relevant cognitions after a myocardial infarction was examined with 158 patients (mean age = 52.7 ± 8.1 yr.). Patients above the median on optimism (i.e., optimists) scored significantly lower on perceived susceptibility, perceived severity, and experienced fear than did pessimists. However, no difference on perceived self-efficacy was reported between optimists and pessimists. It is concluded that these results provide further evidence for the LOTs construct validity.