A test of the optimal classifier’s independence assumption in perceptual categorization

Observers completed perceptual categorization tasks that included separate base-rate/payoff manipulations, corresponding simultaneous base-rate/payoff manipulations, and conflicting simultaneous base-rate/payoff manipulations. Performance (1) was closer to optimal for 2:1 than for 3:1 baserate/ payoff ratios and when base rates as opposed to payoffs were manipulated, and (2) was more in line with the predictions from the flat-maxima hypothesis than from the independence assumption of the optimal classifier in corresponding and conflicting simultaneous base-rate/payoff conditions. A hybrid model that instantiated simultaneously the flat-maxima and the competition between reward and accuracy maximization (COBRA) hypotheses was applied to the data. The hybrid model was superior to a model that incorporated the independence assumption, suggesting that violations of the independence assumption are to be expected and are well captured by the flat-maxima hypothesis without requiring any additional assumptions. The parameters indicated that observers’ reward-maximizing decision criterion rapidly approaches the optimal value and that more weight is placed on accuracy maximization in separate and corresponding simultaneous base-rate/payoff conditions than in conflicting simultaneous base-rate/payoff conditions.     

Job demands–resources model in the context of recovery: Testing recovery experiences as mediators

The aim of the present study was to extend the original Job Demands–Resources (JD-R) model by taking into account recovery as an important mediation mechanism between work characteristics and well-being/ill-health. Specifically, we examined whether recovery experiences—strategies promoting recovery—might have a mediating role in the JD-R model among 527 employees from a variety of different jobs. The results showed that psychological detachment fully mediated the effects of job demands on fatigue at work and mastery partially mediated the effects of job resources on work engagement. Altogether, the results suggest that recovery merits consideration as a mediating mechanism in the JD-R model.     

How psychological stress in the workplace influences presenteeism propensity: A test of the Demand–Control–Support model

The aim of this study is to examine the influence of the sources of psychological stress at work assumed by the Demand–Control–Support (DCS) model on presenteeism propensity. Research propositions are derived from the dynamic version of the Demand–Control model, to which we added the dimension of social support, which is part of the DCS model. Data were obtained from a large representative sample consisting of 1609 public and private sector workers living in the Canadian province of Québec, who responded to a questionnaire, administered using computer-assisted interviewing over a 3-month period in 2007–2008. The results indicate that the combination of low decision authority and high supervisor's support attenuates the positive relationship between job demands and presenteeism propensity within a 10-year time frame of exposure to a new job.     

The origins of hope in adolescence: A test of a social–cognitive model

We investigated the origins of individual differences in hope in adolescents based on a social–cognitive model. Specifically, we examined a mediating role for self-esteem and optimism in the relation between social support and hope. One thousand six hundred fifty four adolescents (781 boys and 873 girls) from Mainland China completed the Multidimensional Scale of Perceived Social Support (MSPSS), the Rosenberg Self-Esteem Scale (RSES), the revised Life Orientation Test (LOT-R) and the Children's Hope Scale (CHS). Social support was associated positively with self-esteem, optimism and hope, and hope was associated positively with self-esteem and optimism. Structural equation modeling analyses revealed that self-esteem and optimism partially mediated the relation between social support and hope, accounting for 62.7% of the effect of social support on hope. The significance and limitations of the results are discussed.     

Probability matching, accuracy maximization, and a test of the optimal classifier’s independence assumption in perceptual categorization

Observers completed perceptual categorization tasks that included 25 base-rate/payoff conditions constructed from the factorial combination of five base-rate ratios (1:3, 1:2, 1:1, 2:1, and 3:1) with five payoff ratios (1:3, 1:2, 1:1, 2:1, and 3:1). This large database allowed an initial comparison of the competition between reward and accuracy maximization (COBRA) hypothesis with a competition between reward maximization and probability matching (COBRM) hypothesis, and an extensive and critical comparison of the flat-maxima hypothesis with the independence assumption of the optimal classifier. Model-based instantiations of the COBRA and COBRM hypotheses provided good accounts of the data, but there was a consistent advantage for the COBRM instantiation early in learning and for the COBRA instantiation later in learning. This pattern held in the present study and in a reanalysis of Bohil and Maddox (2003). Strong support was obtained for the flat-maxima hypothesis over the independence assumption, especially as the observers gained experience with the task. Model parameters indicated that observers’ reward-maximizing decision criterion rapidly approaches the optimal value and that more weight is placed on accuracy maximization in separate base-rate/payoff conditions than in simultaneous base-rate/payoff conditions. The superiority of the flat-maxima hypothesis suggests that violations of the independence assumption are to be expected, and are well captured by the flat-maxima hypothesis, with no need for any additional assumptions.     

The influence of perceptual and semantic categorization on inhibitory processing as measured by the N2–P3 response

In daily activities, humans must attend and respond to a range of important items and inhibit and not respond to unimportant distractions. Our current understanding of these processes is largely based on perceptually simple stimuli. This study investigates the interaction of conceptual-semantic categorization and inhibitory processing using Event Related Potentials (ERPs). Participants completed three Go–NoGo tasks that increased systematically in the degree of conceptual-semantic information necessary to respond correctly (from single items to categories of objects and animals). Findings indicate that the N2 response reflects inhibitory processing but does not change significantly with task difficulty. The P3 NoGo amplitude, on the other hand, is attenuated by task difficulty. Further, the latency of the peak of the P3 NoGo response elicited by the most difficult task is significantly later than are the peaks detected during performance of the other two tasks. Thus, the level of complexity of conceptual-semantic representations influences inhibitory processing in a systematic way. This inhibition paradigm may be a key for investigating inhibitory dysfunction in patient populations.     

Confirmation and the generalized Nagel–Schaffner model of reduction: a Bayesian analysis

Synthese - In their 2010 (Erkenntnis 73:393–412) paper, Dizadji-Bahmani, Frigg, and Hartmann (henceforth ‘DFH’) argue that the generalized version of the Nagel–Schaffner...     

Person–organization fit effects on organizational attraction: A test of an expectations-based model

This study investigates the mechanisms that explain why person–organization (PO) fit impacts organizational attraction. Adopting Edwards and Cable’s (2009) approach, an integrative model is developed around the idea that experiencing value congruence during the recruitment process perpetuates certain expectations about future work environments and employer relationships. These expectations in turn have a positive impact on organizational attraction. Evidence from a longitudinal study on a sample of job seekers suggests that expected opportunities for value expression and need fulfillment offered the most viable explanations of value congruence effects. The implications of important observed differences in the experience of PO fit between job seekers and full-time employees are discussed.     

Can expressions of anger enhance creativity? A test of the emotions as social information (EASI) model

We investigated whether expressions of anger can enhance creative performance. Building on the emotions as social information (EASI) model (Van Kleef, 2009), we predicted that the interpersonal effects of anger expressions on creativity depend on the target's epistemic motivation (EM)—the desire to develop an accurate understanding of the situation (Kruglanski, 1989). Participants worked on an idea generation task in the role of “generator.” Then they received standardized feedback and tips from an “evaluator” (a trained actor) via a video setup. The feedback was delivered in an angry way or in a neutral way (via facial expressions, vocal intonation, and bodily postures). Participants with high EM exhibited greater fluency, originality, and flexibility after receiving angry rather than neutral feedback, whereas those with low EM were less creative after receiving angry feedback. These effects were mediated by task engagement and motivation, which anger increased (decreased) among high (low) EM participants.     

Social support and work–family conflict: A test of an indirect effects model

Most work–family research on social support is based on matching domain relationships, that is, social support in the work domain is related to work interfering with family conflict (WIF) and social support in the family domain is related to family interfering with work conflict (FIW). In this research, based on the conservation of resources (COR) model, we examined the cross domain indirect relationship between social support in the work domain and FIW and the cross domain indirect relationship between social support in the family domain and WIF. We tested this model across three samples in two studies. In Study 1, we examined the cross domain influence of supervisory and spouse support on work–family conflict using two large random samples (N = 1130; N = 2769). In Study 2, we tested an expanded model of social support to include both generic and work–family specific support, and examined the cross domain indirect relationships between these two types of support on work–family conflict using a sample of 435 employees. Specifically, we proposed that social support systems in the work domain such as family friendly organizational policies, family supportive organizational climate, perceived organizational support, and perceived supervisory support will be indirectly and negatively related to FIW via WIF and that spouse/partner support will be indirectly and negatively related to WIF via FIW. Results for Study 1 provided support for the cross domain indirect effects model and results for Study 2 provided support for the cross domain indirect effects for work–family specific social support systems. We discuss implications of these results for the theory and practice of managing work–family conflict.     

Social support and work–family conflict: A test of an indirect effects model

Most work–family research on social support is based on matching domain relationships, that is, social support in the work domain is related to work interfering with family conflict (WIF) and social support in the family domain is related to family interfering with work conflict (FIW). In this research, based on the conservation of resources (COR) model, we examined the cross domain indirect relationship between social support in the work domain and FIW and the cross domain indirect relationship between social support in the family domain and WIF. We tested this model across three samples in two studies. In Study 1, we examined the cross domain influence of supervisory and spouse support on work–family conflict using two large random samples (N = 1130; N = 2769). In Study 2, we tested an expanded model of social support to include both generic and work–family specific support, and examined the cross domain indirect relationships between these two types of support on work–family conflict using a sample of 435 employees. Specifically, we proposed that social support systems in the work domain such as family friendly organizational policies, family supportive organizational climate, perceived organizational support, and perceived supervisory support will be indirectly and negatively related to FIW via WIF and that spouse/partner support will be indirectly and negatively related to WIF via FIW. Results for Study 1 provided support for the cross domain indirect effects model and results for Study 2 provided support for the cross domain indirect effects for work–family specific social support systems. We discuss implications of these results for the theory and practice of managing work–family conflict.     

Perfectionism and emotion regulation in coaches: A test of the 2 × 2 model of dispositional perfectionism

The manner in which coaches regulate their emotions has implications for their performance and well-being. Drawing on research that has found perfectionism to predict emotion regulation in other settings, this study adopted the 2 × 2 model of perfectionism to examine whether subtypes of perfectionism among coaches were associated with variation in the use of emotion regulation strategies. Coaches (N = 238, M age = 23.92, SD = 10.32) from various sports completed measures of perfectionism (personal standards and evaluative concerns) and emotion regulation strategies (expressive suppression, cognitive reappraisal, and control of anger directed inwards and outwards). Moderated hierarchical regression provided mixed support for the 2 × 2 model. As expected, pure personal standards perfectionism (high standards/low concerns) was generally associated with the highest capacity for emotion regulation and pure evaluative concerns perfectionism (low standards/high concerns) with the lowest. Unexpectedly, mixed perfectionism (high standards/high concerns) was associated with the highest level of expressive suppression, suggesting that in some instances standards might exacerbate rather than attenuate concerns.     

Perfectionism and athlete engagement: A multi-sample test of the 2 × 2 model of perfectionism

Few studies have examined how perfectionism relates to athlete engagement. In addition, the studies that do exist have focused on the main effects of dimensions of perfectionism as opposed to their interactive effects. The first purpose of the study was therefore to examine the interactive effects of dimensions of perfectionism in predicting athlete engagement and, in doing so, test the hypotheses of the 2 × 2 model of perfectionism. The second purpose of the study was to examine whether support for the 2 × 2 model depended on the instrument used to measure perfectionism. Three samples of junior and adult athletes from various sports (total N = 730) completed measures of perfectionism indicative of personal standards perfectionism (PSP) and evaluative concerns perfectionism (ECP) (HF-Multidimensional Perfectionism Scale, Cox, Enns, & Clara, 2002; Sport-Multidimensional Perfectionism Scale-2, Gotwals & Dunn, 2009; Multidimensional Inventory of Perfectionism for Sport, Stoeber et al. 2007), as well as a measure of athlete engagement (Athlete Engagement Questionnaire, Lonsdale, Hodge & Jackson, 2007). Moderated regression analyses provided support for the hypotheses of the 2 × 2 model for some facets of engagement but not others. Generally, pure PSP (high PSP/low ECP) was associated with the highest levels of athlete engagement and pure ECP (low PSP/high ECP) was associated with the lowest levels of athlete engagement. Support for the 2 × 2 model also differed depending on the instrument used to measure perfectionism. Overall, the findings suggest that the 2 × 2 model may explain differences between athletes in levels of engagement. However, these differences will depend on which indicators of PSP and ECP are examined.     

Explanations of interindividual – intergroup discontinuity: A review of the evidence

The authors review and evaluate various explanations for the tendency of intergroup relations to be more competitive, or less cooperative, than interindividual relations (the discontinuity effect). They distinguish between two general perspectives, each comprising a set of explanations for the discontinuity effect. The fear and greed perspective assumes that intergroup relations are characterised by greater fear and greed than are interindividual relations. The group decision-making perspective assumes a crucial role for group discussion in facilitating rational comprehension of mixed-motive situations. In general, explanations from the fear and greed perspective were found to be more consistent with the empirical record than explanations from the group decision-making perspective. The authors propose that a complete understanding of the discontinuity effect is yet to be achieved.     

Contexts of the commitment–citizenship link: A test of economic volatility in a dual organization setting

Research interest on the commitment–performance link persists, and recent efforts have focused on investigating the contextual factors due to the mixed outcome of the empirical studies. However, very limited study has examined the influence of economic factors including economic volatility, and none in the dual setting of the organization and the union. This study investigated the contextual influence of perceived inflation—an economic volatility construct—on commitment and extra-role performance. Exchange theory, with support from psychological contract and equity theories, was used to postulate two parallel, but competing models of the organization and the union. Using a sample of 247 unionized employees in southern U.S.A., the study tested the moderating effect of perceived inflation on the relation between commitment and citizenship intent. The results revealed three-way interactive effects in both models, in a dual commitment setting. Thus, the economic volatility construct acts as a situational constraint on the link between the attitudinal-based commitments and citizenship intent, but in the contexts of obligation and cost-based commitments to the organization and the union respectively. The implications of these mitigated effects are discussed.     

Order of acquisition in learning perceptual categories: A laboratory analogue of the age-of-acquisition effect?

In the age-of-acquisition (AoA) effect, an advantage for recognition and production is found for items learned early in life, as compared with items learned later. In this laboratory analogue, participants learned to categorize novel random checkerboard stimuli. Some stimuli were presented from the onset of training; others were introduced later. At test, when early and late stimuli had equal cumulative frequency, early stimuli were classified significantly more quickly. Because stimuli were randomly assigned to be introduced either early or late, we can conclude that early stimuli were categorized more quickly because of their order of acquisition. This finding suggests that age- or order-of-acquisition effects are a general property of any learning system.     

Mutual mother–pup vocal recognition in the highly colonial Cape fur seal: evidence of discrimination of calls with a high acoustic similarity

Animal Cognition - The Cape fur seal (Arctocephalus pusillus pusillus) is one of the most colonial mammal species in the world. Females exclusively nurse their pups for 9 to 11 months,...     

Predicting change in middle school students’ leisure-time physical activity participation: A prospective test of the trans-contextual model

We applied the trans-contextual model (TCM) to examine the effects of middle school students’ perceived autonomy support from their physical education (PE) teachers on autonomous motivation toward PE in school and, critically, autonomous motivation toward, and actual participation in, leisure-time physical activity (PA). The research adopted a three-wave prospective design enabling the modeling of change in the TCM constructs over time. Middle school students (N = 248) aged from 12 to 16 years reported their perceived autonomy support, autonomous motivation in PE, autonomous motivation toward leisure-time PA, attitudes, subjective norms, perceived behavioral control (PBC), intentions for PA in leisure-time, and leisure-time PA participation. The psychological constructs and leisure-time PA were measured at baseline (T0) and at a first follow-up occasion (T1) 5 weeks later. Another measure of PA was taken at a second follow-up occasion (T2) a further 5 weeks later. A single-indicator structural equation model using residualized change scores revealed that perceived autonomy support predicted autonomous motivation in PE (β = .345), and autonomous motivation in PE predicted autonomous motivation for leisure-time PA (β = .484). Autonomous motivation toward leisure-time PA predicted attitudes (β = .425), subjective norms (β = .264), and PBC (β = .517). Autonomous motivation toward leisure-time PA (β = .376), attitude (β = .231), and subjective norms (β = .185) predicted intentions toward leisure-time PA, and intentions predicted PA (β = .198). Findings extend research on the TCM by demonstrating its efficacy in predicting change in middle school students’ autonomous motivation across PE and leisure-time contexts, and accounting for change in intentions toward, and actual participation in, leisure-time PA.     

A narrative synthesis of the applicability of the CaR–FA–X model in child and adolescent populations: a systematic review

The CaR–FA–X model [Williams, J. M. G., Barnhofer, T., Crane, C., Hermans, D., Raes, F., Watkins, E.,?…?Dalgleish, T. (2007). Autobiographical memory specificity and emotional disorder. Psychological Bulletin, 133(1), 122–148. doi:10.1037/0033-2909.133.1.122] is the most prominent and comprehensive model of overgeneral autobiographical memory (OGM) and provides a framework for OGM. The model comprises of three mechanisms, capture and rumination, functional avoidance and impaired executive control. These can independently, or in interaction, account for OGM. This systematic review aims to evaluate the existing research on the CaR–FA–X model, and trauma exposure studies specific to child and adolescent populations. The following databases were searched: “PsychInfo”, “PsychArticles”, “PubMed”, “Web of Science”, “Medline”, “SCOPUS” and “Embase” for English-language, peer-reviewed papers with samples <M?=?18 years, published since 1986. Support was reported for a relationship between trauma exposure and OGM as well as for capture errors and OGM. Limited support was found for rumination, avoidance and impaired executive control in isolation. No support was found for interacting mechanisms and OGM. Partial support for the CaR–FA–X model was found for child and adolescent populations. Recommendations, proposals for future research and plausible explanations for the mixed findings are discussed.