Post-traumatic stress disorder and health risk behaviour among persons 15 years and older in South Africa

The aim of this study was to investigate the association between post-traumatic stress disorder (PTSD) and health risk behaviours among persons 15 years and older in South Africa. We analysed data from the South African National Health and Nutrition Examination Survey (SANHANES-1, 2012) (N = 15 201; mean age = 36.9 years, SD = 16.5; 2.1% with PSTD, 4.0% with partial PTSD). The survey included questions from validated measures of the following health risk behaviours: problem drinking, current tobacco use, physical activity, sedentary behaviour, vegetable consumption, and fast food and frequent soft drinks consumption. In adjusted logistic regression analysis, only self-reporting with PTSD was associated with problem drinking. The data did not yield significant association between PTSD status and any of the other health risk behaviours (tobacco use, low physical activity, and fast food consumption).     

Les effets des activités auto-descriptives sur la clarté du concept de soi : le rôle modérateur des variables sociodémographiques

This research questions the possibility of inducing the development of self-concept clarity (SCC), through a self-describing activity. A test-retest device comprises three groups: neutral (no intermediate activity), control (logical-cognitive activity), experimental (self-describing activity). The results indicate that the self-describing activity generates the largest effect, but become significantly stronger when individuals start with a low CCS, which is often the when belonging to less values socio-demographic categories. We reinterpet these process in terms of “remediation” et we explore possibilities to measure and develop professional orientation practices for this purpose.     

Enactment effects and integration processes in younger and older adults’ memory for actions

The present study investigates the mental processes that are applied to previously attended items of working memory. In an object-switching task, participants counted the number of sequentially presented objects. In Experiment 1 the processing time increased when the object category switched from the prior trial compared to a repetition. More importantly, the further in the past the last instance of a current category was presented, the more processing time was necessary—an observation suggesting passive decay rather than inhibition of previously attended items. However, results differed when only two object categories were employed. Experiment 2 suggests that the lack of a clear indication of decay with small numbers of categories was due to participants’ expectancy of category switches rather than repetitions. Taken together, the results suggest that working memory items become less accessible the longer they have not been attended to, when strategic processes are controlled.     

Decomposing the within-person and between-person sources of variation in physical activity-cognition associations for low-active older adults

Abstract

Objectives: To examine within-person and between-person sources of variation in the relationship between physical activity and cognition in older adults participating in a walking program. To explore whether demographic, health and fitness variables, and their interactions with activity, are significant predictors of cognition.

Design: Brief longitudinal burst design.

Participants: 118 participants (91 females, mean age?=?72.81?+ 5.24 years).

Main Outcome Measures: Cognition, self-reported moderate-to-vigorous walking and self-reported moderate-to-vigorous physical activity were assessed at baseline and 6, 9, 12 and 16 weeks follow-up. Attendance at weekly walks was also recorded.

Results: Within-persons, changes in physical activity were related to select measures of executive functioning, with increased activity predictive of better cognition (three of four cognitive functions, p<.05). Between-persons, activity was also associated with cognition (two of four cognitive functions, p<.05). Younger age and higher education were related to better cognition. Interactions of demographic, health, and fitness variables with changes in within-person activity were generally non-significant.

Conclusion: The results highlight the importance of distinguishing within- from between-person effects in longitudinal analyses of the association between physical activity and cognition. This stringent within-person test of association underscores the potential value of simple physical activity interventions for improving cognitive function.     

Predictors of physical activity,healthy eating and being smoke-free in teens: A theory of planned behaviour approach

This paper elicited context specific underlying beliefs for physical activity, fruit and vegetable consumption and smoke-free behaviour from the Theory of Planned Behaviour (TPB), and then determined whether the TPB explained significant variation in intentions and behaviour over a 1 month period in a sample of grade 7–9 (age 12–16 years) adolescents. Eighteen individual interviews and one focus group were used to elicit student beliefs. Analyses of this data produced behavioural, normative and control beliefs which were put into a TPB questionnaire completed by 183 students at time 1 and time 2. The Path analyses from the main study showed that the attitude/intention relationship was moderately large for fruit and vegetable consumption and small to moderate for being smoke free. Perceived behavioural control had a large effect on being smoke free and a moderately large effect for fruit and vegetable consumption and physical activity. Intention had a large direct effect on all three behaviours. Common (e.g. feel better, more energy) and behaviour-specific (e.g., prevent yellow fingers, control my weight) beliefs emerged across the three health behaviours. These novel findings, to the adolescent population, support the importance of specific attention being given to each of the behaviours in future multi-behavioural interventions.     

Perceived variety,psychological needs satisfaction and exercise-related well-being

Objective: Perceived variety represents a psychosocial experience that gives rise to, and supports the maintenance of, an individual’s well-being. In this study, we developed an instrument to measure perceived variety in exercise (PVE), and examined whether ratings of PVE predict unique variance in indices of exercise-related well-being in addition to that explained by satisfaction of the three basic psychological needs (for competence, relatedness and autonomy) embedded within self-determination theory (SDT). We also examined the extent to which variance in perceived variety is empirically distinct from (or subsumed by) competence, relatedness and autonomy in the context of exercise.

Methods: A convenience sample of community adults (N?=?507) completed online surveys twice over a six-week period (n?=?367).

Results: PVE was found to prospectively predict unique variance in indices of exercise-related well-being, in addition to that explained by perceived competence, relatedness and autonomy. Using exploratory and confirmatory factor analytic procedures, perceived variety was found to be empirically distinct from perceived competence, relatedness and autonomy.

Conclusion: Results from this work suggest that perceived variety holds potential for theoretical and applied advancements in understanding and predicting well-being in exercise settings.     

Dimensions of perceived control: A factor analysis of three measures and an examination of their relation to activity level and mood in a student and cross-cultural patient sample

Abstract

This study investigated whether measures of three perceived control (PC) concepts tapped independent dimensions, were invariant to population characteristics of health and culture, were differentially sensitive to health outcomes, and were discriminable from self-report disability. The Multidimensional Health Locus of Control, Generalized Self-efficacy, and Perceived Health Competence (PHC) Scales were administered to 106 Scottish students and 145 Scottish, Spanish and Irish patients, who also completed versions of the Sickness Impact Profile. Principal Components analyses revealed five factors reflecting scale constructions for students and six factors for patients, as PHC items fell on two factors. Disability items fell on a separate factor from all PC items. Results suggest: (a) PC is multidimensional regardless of health and culture; (b) adequate assessment requires multiple PC measures; and (c) it is meaningful to consider PC as a possible influence on disability.     

Health enhancing physical activity as perceived in interviews based on the theory of planned behaviour

Abstract

The perception of behaviours from two categories of health enhancing physical activity (HEPA): outdoor aerobic exercise (OAE) and everyday commuting activity (ECA) was examined in a sample of middle-aged persons (N= 50). A focused semi-standardised interview was constructed on the bases of the components of the Theory of Planned Behaviour (TPB). The participants perceived OAE behaviours predominantly from the viewpoint of exercise and those of the ECA from that of the fluency of daily routines. They considered the OAE as sensible and associated it with positive health or fitness outcomes, but only those practising it also attributed positive psychological effects to OAE behaviours. A slightly better congruence with the TPB was found for the OAE behaviours than for those of the ECA. The difference is discussed in the light of the higher degree of decisional control with the OAE behaviours and the greater psychological heterogeneity of the ECA.     

The relation between risk perceptions and physical activity among older adults: A prospective study

Past studies have found that risk perceptions of suffering from diseases play an important role in the development of intentions to perform physical activity (PA). According to the behaviour motivation hypothesis, perceived risk could be positively and directly related to PA, but this possibility has been ignored and/or underestimated. Accounting for recent methodological developments on the importance of study design and risk perception assessment, the purpose of the present study was to examine the risk-perceptions–PA relationship among older adults. Participants (N?=?143) aged from 61 to 70 years initially underwent measurement of risk perceptions, baseline PA, socio-demographic and health factors. Six months later, they were asked about their PA participation. Multiple regression analyses revealed that perceived risk of suffering from diseases and conditions without regular PA participation was an independent positive predictor of later PA, over and beyond baseline behaviour, socio-demographic and health variables. This study fills a gap in the existing literature on the PAs of older adults and reveals that risk perceptions are directly linked to their participation. In addition, it extends existing knowledge in health psychology on the behaviour motivation hypothesis, and emphasises the necessity of methodological adjustments when assessing the risk-perception–behaviour relationship.