Predicting physical activity intention and behaviour using achievement goal theory: A person-centred analysis

The purpose of the current study was to identify the 2 × 2 achievement goals profiles at the intraindividual level using a latent profile analyses (LPA) approach while controlling for the nesting of students within classroom. Additional analyses involving the direct inclusion of predictors and outcomes to the final latent profile solution were also used to examine the relationships between the latent profiles and perceived motivational climate, intention to be physically active and physical activity participation. A sample of 1810 school children aged 14–19 years drawn from 79 classes in 13 Singaporean schools took part in the study. Using the latent profile analysis, four distinct motivational profiles could be identified. The results from multinomial logistic regressions showed that profile membership was significantly predicted by perceptions of mastery and performance climate. Finally, the results showed that the four profiles differed significantly in terms of intention to be physically active and physical activity participation.     

A step away from impaired well-being: a latent growth curve analysis of an intervention with activity trackers among employees

ABSTRACT

The present study evaluated the effectiveness of a workplace intervention combining activity trackers (behavioural approach) with an online coach (cognitive approach) in order to increase employees’ number of steps and improve their impaired well-being (i.e., emotional strain and negative affect). To analyse the intervention’s effectiveness, the study applied latent growth curve modelling. Moreover, we tested whether work-related and personal resources (i.e., job control and self-efficacy) moderated the intervention’s effectiveness and whether an increase in number of steps was associated with an improvement in impaired well-being. During the intervention, data were collected at six measurement points from 108 mainly low active employees. The results revealed that employees increased their number of steps until the second intervention week; this increase was not moderated by job control or self-efficacy. Moreover, the intervention was effective in decreasing emotional strain and negative affect over the course of the intervention. Further analyses showed that the increase in number of steps was related to the decrease in negative affect, whereas no such association was found for the increase in number of steps and the decrease in emotional strain. In conclusion, the findings showed that our intervention was effective in improving physical activity and impaired well-being among employees.     

An electrophysiological model of working memory performance

Working memory (WM) enables us to keep a limited amount of information in active mode. It is believed that attention refreshes necessary information in WM and prevents their forgetting. Despite a plethora of models offered, it is not fully understood that what factors may be involved in forgetfulness and in the required time for refreshing the information. In this study, an electrophysiological model of WM is proposed that consists of several resistor-capacitor units. Inspired of the “resource capacity theory,” attention as a limited source of energy refreshes the voltage level of these units. According to the “time-based resource sharing theory,” only one of these units is allowed to use the limited source of attention at each moment. The source of attention is shared between active units. This model mimics the pattern of several well-known observations of WM such as the recall interval, the word length, and the serial position effect. Some suggestions have been provided about influencing factors in WM performance. Model parameters give the ability of investigating the possible effect of some other factors on WM performance and also a probable prediction about how much information can we chunk?     

‘The doing is everything’: a middle-voiced reading of agency in Nietzsche

ABSTRACT

Nietzsche's famous claim, ‘das Thun ist Alles’, is usually translated as ‘the deed is everything’. I argue that it is better rendered as ‘the doing is everything’. Accordingly, I propose a processual reading of agency in GM 1 13 which draws both on Nietzsche's reflections on grammar, and on the Greek middle voice, to displace the opposition between deeds and events, agents and patients by introducing the notion of middle-voiced ‘doings’. The relevant question then is not ‘is this a doing or a happening?’ but ‘what is the process unfolding in the doer, and what is her engagement with it?’. I argue (a) that this middle voiced reading makes better sense than either naturalist or expressivist interpretations of the key thought in GM 1 13 that ‘there is no doer behind the doing’, and (b) that GM 1 13 does not only provide us with a critique of slave morality, as is often said, but also with an example of a middle-voiced doing: self-deception. I explore the phenomenology of middle-voiced doings in other passages and show that it has at least three features: (pre-)reflective awareness of being engaged with an internal process, responsiveness, and absence of reflective control.     

The dynamic mechanism of a novel stochastic neural firing pattern observed in a real biological system

In the experimental neural pacemaker of a rat, a novel firing pattern has been discovered. This pattern was generated between the period 2 firing pattern and the period 3 firing pattern during the periodic adding bifurcation and inverse periodic adding bifurcation. The pattern was observed and analyzed in the present investigation. The composition of this novel firing pattern could be regarded as a transition between a string of period 2 burst and a string of period 3 burst without single period 2 or period 3 burst, which was different from those chaotic and stochastic neural firing patterns in previous reports. It was identified to be stochastic by the inter-event intervals (IEIs) analysis, although it exhibited chaos-like characteristics with the results of the inter-spike intervals (ISIs) analysis. The numerical simulation suggested that the new pattern observed in the real biological system could be simulated in the stochastic Chay model but not in the deterministic model. With the signal to noise ratio (SNR) analysis and bifurcation analysis, this novel firing pattern was considered to be generated by stochastic resonance under the influence of noise near the periodic adding (inverse) bifurcation point. The probability analysis of transformed binary chain further confirmed that the origin of stochastic and chaos (deterministic)-like characteristics of this novel firing pattern.     

Depression severity and psychosocial determinants of physical activity behavior in in-patients with major depressive disorders

BackgroundPhysical inactivity is a world-wide health issue. In people with major depressive disorders approximately 68% do not reach the recommended physical activity levels. Psychosocial determinants of and implicit attitudes towards physical activity serve to explain physical activity behavior and may form the basis of interventions to promote physical activity. The aim of this study was to examine, whether psychosocial determinants and implicit attitudes towards physical activity vary according to depression severity.MethodsPhysically inactive, adult in-patients diagnosed with major depressive disorder (according to ICD-10) were recruited from four Swiss psychiatric clinics. Psychosocial determinants of physical activity were assessed with seven questionnaires pertaining to motivational and volitional aspects of physical activity. Implicit attitudes towards physical activity were measured with a computer-based Single Target Implicit Association Test.ResultsIn-patients (N = 215, M_age = 41 ± 13 years, 53% female) with major depressive disorder reporting more severe (n = 52) depression symptomology exhibited less favorable psychosocial determinants for physical activity behavior (self-efficacy, negative outcome expectancies, intention, intrinsic motivation, introjected motivation, external motivation, action planning, perceived barriers, coping planning) compared to those with mild (n = 89) and moderate (n = 74) depression symptomology. Positive outcome expectancies, identified, social support and implicit attitudes towards physical activity did not vary according to depression severity.ConclusionsPsychosocial determinants of physical activity do vary according to depression severity. Attempts to promote physical activity among people with major depressive disorder should take depression severity into account when developing and delivering interventions.Trial registrationISRCTN registry, ISRCTN10469580, registered on 3^rd September 2018, https://www.isrctn.com/ISRCTN10469580.