Truth,Predication and a Family of Contingent Paradoxes

In truth theory one aims at general formal laws governing the attribution of truth to statements. Gupta’s and Belnap’s revision-theoretic approach provides various well-motivated theories of truth, in particular T* and T#, which tame the Liar and related paradoxes without a Tarskian hierarchy of languages. In property theory, one similarly aims at general formal laws governing the predication of properties. To avoid Russell’s paradox in this area a recourse to type theory is still popular, as testified by recent work in formal metaphysics by Williamson and Hale. There is a contingent Liar that has been taken to be a problem for type theory. But this is because this Liar has been presented without an explicit recourse to a truth predicate. Thus, type theory could avoid this paradox by incorporating such a predicate and accepting an appropriate theory of truth. There is however a contingent paradox of predication that more clearly undermines the viability of type theory. It is then suggested that a type-free property theory is a better option. One can pursue it, by generalizing the revision-theoretic approach to predication, as it has been done by Orilia with his system P*, based on T*. Although Gupta and Belnap do not explicitly declare a preference for T# over T*, they show that the latter has some advantages, such as the recovery of intuitively acceptable principles concerning truth and a better reconstruction of informal arguments involving this notion. A type-free system based on T# rather than T* extends these advantages to predication and thus fares better than P* in the intended applications of property theory.

     

Approximant phases,phason planes and domain-boundary networks in Al−Ni−Rh alloys

Structurally complicated ξ′- and ξ-phases have been found, for the first time, in as-cast Al₇₃Ni₅Rh₂₂ and Al₇₅Ni₁₅Rh₁₀ alloys. The lattice parameters of these two phases were determined by means of electron diffraction and high-resolution transmission electron microscopy (HREM). These two phases have similar orthorhombic structures but with different lattice parameters of a?=?23.2?Å, b?=?16.4?Å, c?=?12.0?Å for the ξ′-phase and a?=?20.3?Å, b?=?16.4?Å, c?=?14.8?Å for the ξ-phase. A new two-dimensional domain-boundary network has also been observed in these two phases. Domain boundaries with normals closely parallel to the [001] direction are actually phason planes represented by a translation vector of r?=(1/2)a?+(1/2τ)c in the ξ′-phase and r=±(1/2τ²) a?+(τ/2)c in the ξ-phase, whereas the newly-found wide and zigzag boundaries perpendicular to the above set were attributed from the step-like boundary structures of domains related by a translation vector of r?=(1/τ)((1/2)a?+(1/2τ)c). The structural difference between the two types of planar faults is discussed.     

Hope,goals, and pathways: Further validating the hope scale with observer ratings

ABSTRACT

Objective: For the past two decades, hope theory has been an important framework for conceptualizing goal pursuits. Surprisingly there has been little effort to test the underlying suppositions of hope theory or to further validate the Hope Scale.

Method: In Study 1, participants (N = 162, M_age = 19, 61% female) completed the Hope Scale and nominated goals they would like to accomplish in the next few months. Goals were coded on several dimensions. In Study 2, participants (N = 118, M_age = 19, 59% female) completed the Hope Scale, measures of optimism and self-efficacy, and generated workable pathways for achieving standardized goals.

Results: Hope scores predicted setting objectively important, prosocial, long-term, and challenging goals. Hope (but not optimism or self-efficacy) was associated with generating more pathways for standardized goals.

Conclusions: The results of these studies generally support the tenets of hope theory and provide further validation for the Hope Scale. As expected, people with higher hope were more likely than their lower-hope counterparts to engage in what has been considered successful goal-setting behavior. Hope is associated with important goal-relevant behaviors and efforts to increase hopeful thought may be important in helping individuals to move toward important life outcomes.     

Mobility of c dislocations in Ti3, Al

Abstract

The rôle of dislocations with Burgers vectors, b, given by b = [0001] during deformation of samples of the intermetallic compound Ti₃Al has been assessed. At room temperature, the experimental evidence is consistent with these dislocations being sessile, their density and morphology being similar to that in undeformed samples. In samples deformed at 650°C and above, it is concluded that motion of these dislocations is effected by dislocation climb. The line directions of the various segments of dislocations with b= [0001] are shown to be perpendicular to planes that contain sheets of Ti atoms, with an expected tendency to exhibit a high Peierls stress.     

Learning by explaining: Impacts of explanations on the development of a competence

IntroductionPrevious research has mainly studied the impact of activity explanation on performances (e.g., Chi, 2009), but little research has been done to examine its impact on the development of a competence.ObjectiveA model of dynamic analysis of competence (Coulet, 2011) has been used to measure the impact of activity explanation on the development of a technical competence.MethodExplanation of tasks of varying complexity has been manipulated in two experimental studies; effects of activity explanation have been measured on objective performance, perceptions related to the task and final explanations.ResultsParticipants who explained their activity not only performed better on the tasks, but also showed more positive perceptions of their relations to the task and a better ability to produce didactic explanations.ConclusionPsychological processes involved in explaining activity and their implications are examined and discussed.     

Qualités psychométriques d’une version francophone du « Displaced Aggression Questionnaire »

IntroductionThe Displaced Aggression Questionnaire is currently the only self-report instrument to measure individual tendency to displace aggression. It is composed of three factors, which assess an affective dimension (angry rumination), a cognitive dimension (revenge planning) and a behavioral dimension (displaced aggression).ObjectiveTo adapt a French translated version of the Displaced Aggression Questionnaire and test the psychometrics.MethodIn this study, we recruited 191 adults in the community. The questionnaire has been adapted and validated with respects to guidelines for the process of transcultural adaptation and validation of self-report measures. A principal component analysis has been used to assess the structure of the French version of the questionnaire.ResultsAfter taking into account one item that has not loaded onto any of the three expected factors, the principal component analysis confirmed the hypothesized three-factor structure for the French version of the questionnaire according to the original structure of the scale. It has been named Questionnaire d’Agression Déplacée in French. Results showed good psychometric qualities for the internal consistency, the discriminant and concomitant validity and the reliability.ConclusionBased on these positive results, this version can already be used by French speaking researchers.     

Can sleep habits predict driver behaviour?

IntroductionThe role of sleep hygiene (those factors that promote or disrupt effective sleep) on human performance was examined.ObjectiveThe study investigated the relationship between sleep hygiene and crash involvement.MethodMeasures of sleep hygiene and crash involvement were considered for a sample of over 6000 drivers.ResultsIt was found that poorer sleep hygiene was associated with younger age and greater crash involvement. The association between sleep hygiene and crash involvement remained when age and risk taking had been taken into account.ConclusionPoor sleep hygiene is associated with poorer performance as measured by crash involvement.     

Effects of workaholism on volunteer firefighters’ performance: a moderated mediation model including supervisor recognition and emotional exhaustion

ABSTRACT

Background and Objectives: Although workaholism has been associated with job performance, the mechanisms that explain this relationship remain unclear. In this study, we investigated the conditional indirect effects of workaholism on performance via emotional exhaustion, across low and high levels of supervisor recognition.

Methods: We conducted an empirical cross-sectional study using a sample of 1028 volunteer firefighters who completed a self-report questionnaire assessing workaholism, emotional exhaustion, work performance, and supervisor recognition.

Results: Tests of latent interactions were performed using the latent moderated structural equation modeling approach. Consistent with our predictions, results revealed that the negative indirect effects of workaholism on performance, through emotional exhaustion, were stronger when supervisor recognition was low.

Conclusions: Theorical contributions and perspectives, as well as implications for practice are discussed.     

Core structure of a〈100〉 superdislocations in a single-crystal superalloy during high-temperature and low-stress creep

A thorough TEM analysis has been carried out to study the dislocations cutting into γ′ phase in a single-crystal superalloy during uniaxial tensile creep under high-temperature and low-stress conditions. It is proved that the a〈100〉 edge superdislocation originates from the interfacial a〈100〉 dislocations and moves into the γ′ phase by pure climbing. And the dissociation of the a〈100〉 superdislocation core into two a/2〈101〉 superpartial dislocations during uniaxial tensile creep has been identified by HRTEM method for the first time.     

Local order description of an icosahedral Al–Cu–Fe quasicrystal

Abstract

A rapidly solidified Al₆₅Cu₂₀Fe₁₅ icosahedral alloy has been studied by extended X-ray absorption he structure above the Cu and Fe K absorption edges. The local order has been determined around Cu and Fe atoms and compared with results obtained previously in other icosahedral alloys     

Cognitive rigidity in patients with depression and fibromyalgia

Background/ObjectiveThe comorbidity of depression and fibromyalgia chronic syndrome has been well documented in the literature; however, the cognitive structure of these patients has not been assessed. Previous results reported variability in cognitive rigidity in depressive patients, the key for this might be the presence of chronic physical pain such as fibromyalgia. The present study explores and compares the cognitive rigidity and differentiation, between patients with depression with and without fibromyalgia syndrome.MethodThirty one patients with depression and fibromyalgia were matched, considering age, sex and number of depressive episodes, with 31 patients with depression but without fibromyalgia diagnosis. Cognitive rigidity and differentiation were measured with the repertory grid technique.ResultsThe results indicated that depressed patients with fibromyalgia presented higher levels of depressive symptoms, greater cognitive rigidity and lower cognitive differentiation than those without fibromyalgia.ConclusionsThe results might inform future treatments to address the cognitive structure of these patients.     

Associations between childhood adversity and daily suppression and avoidance in response to stress in adulthood: can neurobiological sensitivity help explain this relationship?

Background and objectives: Although it has been postulated that psychological responses to stress in adulthood are grounded in childhood experiences in the family environment, evidence has been inconsistent. This study tested whether two putative measures of neurobiological sensitivity (vagal flexibility and attentional capacity) moderated the relation between women’s reported exposure to a risky childhood environment and current engagement in suppressive or avoidant coping in response to daily stress.

Design and methods: Adult women (N?=?158) recruited for a study of stress, coping, and aging reported on early adversity (EA) in their childhood family environment and completed a week-long daily diary in which they described their most stressful event of the day and indicated the degree to which they used suppression or avoidance in response to that event. In addition, women completed a visual tracking task during which heart rate variability and attentional capacity were assessed.

Results: Multilevel mixed modeling analyses revealed that greater EA predicted greater suppression and avoidance only among women with higher attentional capacity. Similarly, greater EA predicted greater use of suppression, but only among women with greater vagal flexibility.

Conclusion: Childhood adversity may predispose individuals with high neurobiological sensitivity to a lifetime of maladaptive coping.     

Critical reflections on second-generation mindfulness-based interventions

ObjectivesThe purpose of this paper is to provide a critical introduction on Second-Generation Mindfulness-Based Interventions (SG-MBIs) to sport and performance psychology scholars and practitioners.MethodThis essay is written as a commentary on Roychowdhury et al.’s, (2021, this issue) article in this issue. Specifically, I apply theoretical insights from Roychowdhury et al., (2021, this issue) to the practical model of SG-MBIs.ResultsI find that SG-MBIs attempt to respond to ethical concerns with the ways that mindfulness has been commodified, secularized, and universalized through appeals to cultural authenticity.DiscussionWhile acknowledging the cultural contexts from which practices like mindfulness have been taken is important, appeals to cultural authenticity often reproduce fixed and essentializing constructions of culture and are easily coopted by neoliberal multiculturalism.ConclusionAs sport and performance psychology professionals reflect on the next generation of mindfulness-based interventions, it will be important to attend to the contextual flexibility of neoliberalism to universalize and essentialize.     

Self-control depletion and sleep duration: the mediating role of television viewing

Abstract

Objective: Sleep insufficiency has been related to self-control failure: people fail to go to bed in time and end up sleep deprived. The role of state self-control in predicting bedtime and sleep duration has not yet been investigated. Based on research claiming an overlap between depleted self-control resources and fatigue, self-control depletion may foster earlier bedtimes. Conversely, self-control depletion also increases the propensity to procrastinate bedtime by giving in to the immediate gratification of late night entertainment. This study therefore looked at procrastinatory television viewing and its intermediary role in the association between state self-control and bedtime. The implications for sleep duration are examined. Design: Firstyear students (N = 234) participated in an online survey. Using Day Reconstruction Method, they charted their activities and experiences during the preceding day and subsequent bedtime behavior. Results: Self-control depletion was directly related to earlier bedtimes, which we explained by its similarity to fatigue. This was associated with longer sleep duration. Self-control depletion was indirectly related to later bedtimes because it increased the propensity to procrastinate by watching television. This was associated with shorter sleep duration. Conclusion: This study exposes a dual pathway between self-control depletion and sleep duration, whereby procrastinatory television viewing may reduce sleep duration.     

Reciprocal relations between workplace bullying,anxiety, and vigor: a two-wave longitudinal study

Background and Objectives: Workplace bullying has been classified as an extreme social stressor in work contexts and has been repeatedly linked to several negative consequences. However, little research has examined reversed or reciprocal relations of bullying and outcomes. Design: We conducted a two-wave longitudinal study with a time lag of six months. Methods: The study sample consisted of 348 employees of the Spanish workforce. The present study examined longitudinal relationships between workplace bullying, psychological health, and well-being. On the basis of conservation of resources theory, we hypothesized that we would find reciprocal relations among study variables over time. Results: Results of cross-lagged structural equation modeling analyses supported our hypotheses. Specifically, it was found that Time 1 (T1) workplace bullying was negatively related to Time 2 (T2) vigor and positively related to T2 anxiety. Additionally, T1 anxiety and vigor had an effect on T2 workplace bullying. Conclusions: Overall, these findings support the validity of the theoretical models postulating a reciprocal bullying–outcome relationship, rather than simple one-way causal pathways approaches.     

The effects of scenario-based risk information on perceptions of susceptibility to Chlamydia and HIV

Abstract

Objectives: The Self-Report Habit Index (SRHI) was originally reported as one-dimensional; however, habit has been described as characterised by several features. Moreover, one-dimensional models for the SRHI have demonstrated poor fit. Therefore, we aimed to compare multidimensional models with a one-dimensional model in both snacking and physical activity habits, besides examining further instrument characteristics.

Design: A cross-sectional study was conducted with high school and university students (n?=?555).

Main outcome measure: The SRHI adapted for physical activity and for snaking habits was applied at one time point.

Results: Nested models with one factor, two factors and three factors were compared. Next, a hierarchical second-order model was tested, and further validity issues, as well as invariance between habits, were examined. Three-dimensional models represented a better fit for both habits. However, fit was still inadequate in the snacking version. In addition, discriminant validity concerns emerged for the physical activity SRHI. Moreover, invariance between the snacking and the physical activity versions was not confirmed.

Conclusions: Considering the SRHI as composed by the dimensions of ‘lack of awareness’, ‘lack of control’ and ‘history of behavioural repetition’ seems to be more accurate. Nevertheless, our findings suggest that further research is needed.     

A French validation of the short Need For Affect scale

IntroductionThe way we interact with our environment depends on our spontaneous tendency to approach or to avoid emotional experiences triggered by that environment. This dimension of the emotional experience is called the need for affect, that is, the tendency of individuals to adopt approaching or avoidance behaviour with regard to emotional stimuli.MethodsThe Need For Affect (NFA) Scale has been the subject of numerous studies since the validation of the original version (Maio & Esses, 2001) and its short version (Appel et al., 2012). However, no validation of the latter scale has been conducted in French. We propose a French version of the short NFA scale on a student sample and a sample from the general population.ResultsWe found the structure of the original scale in a French translation (of the English version). In addition, invariance tests showed that this structure remained the same for both samples.ConclusionWe recommend the use of this version of the short NFA scale for studies conducted on French-speaking samples.     

Trajectories of self-efficacy in persons with chronic illness: An explorative longitudinal study

Background: Self-efficacy is important for changing health behaviour in persons with chronic illness. Longer term trajectories have not been previously explored.

Objective: This study’s objective was to explore the trajectories of self-efficacy in two different groups with chronic illnesses attending a patient education course.

Design: The study design was a longitudinal, comparative cohort study with five time points during a one-year follow-up, using repeated measures analysis of variance.

Setting and participants: Persons with morbid obesity (n = 55) and persons with chronic obstructive pulmonary disease (COPD; n = 56) were recruited at the start of patient education courses in Norway and followed-up four times the following year.

Main outcome measure: The General Self-Efficacy Scale was the main outcome.

Results: Obese persons showed a linear pattern of increasing self-efficacy during the follow-up period, whereas persons with COPD had an initial increase followed by a decrease in self-efficacy. Having paid work was associated with a more positive self-efficacy trajectory.

Conclusion: The results provide support for the currently employed patient education course for morbidly obese persons. In contrast, persons with COPD may need more extensive and/or more frequent support in order to increase and maintain self-efficacy across time.     

Socioemotional selectivity and psychological health in amyotrophic lateral sclerosis patients and caregivers: a longitudinal,dyadic analysis

Abstract

Objective: Socioemotional selectivity theory predicts that as the end of life approaches, goals and resources that provide immediate, hedonic reward become more important than those that provide delayed rewards. This study tested whether these goal domains differentially affected psychological health in the context of marital dyads in which one partner had been diagnosed with amyotrophic lateral sclerosis (ALS), a life-limiting disease.

Design: ALS patients (N?=?102) being treated in three multidisciplinary clinics and their spouses (N?=?100) reported their loneliness, financial worry and psychological health every 3 months for up to 18 months.

Main Outcome Measure: Psychological health composite.

Results: In multilevel dyadic models, patients and spouses had similar levels of financial worry and loneliness. Both patients and spouses had worse psychological health with higher loneliness, but only spouses had worse psychological health with higher financial worry. Significant interactions with age and disease severity indicated that older spouses were more affected by loneliness than were younger spouses, and patients with less severe disease were more affected by financial worry than patients with more severe disease.

Conclusion: The results provide good support for socioemotional selectivity theory’s implications for psychological health in a strong test of the theory.     

Group cohesion and adherence in unstructured exercise groups

ObjectivesPrevious research has reported a positive relationship between perceptions of cohesion and adherence within structured exercise settings. Given that the social determinants of adherence can vary across situations, this study aimed to examine the cohesion–adherence relationship in unstructured exercise settings.DesignThis study employed a cross-sectional design.MethodsYoung adults (N = 125) recalled an unstructured exercise group where they had been participants, and then rated their perceptions of cohesion with respect to that group as well as reported the number of times/month they had been active in that group.ResultsRegression results revealed that cohesion was significantly related to adherence. Individuals who reported higher levels of task and lower levels of social cohesion, with both dimensions of cohesion reflecting the perceptions of the group as a totality, attended more sessions.ConclusionsThese findings extend research reporting that the cohesiveness perceived in a structured exercise group is related to adherence. However, there were two findings that were not consistent with previous research. The failure of the task dimension associated with satisfying personal needs and objectives to emerge as well as the emergence of a negative relationship with one of the social dimensions of cohesion suggest that the relationship between cohesion and adherence may play out differently in an unstructured versus structured setting with young adults.