The Role of Information Reduction in Skill Acquisition

Theories of skill acquisition assume that the effects of practice on task performance are due to either qualitative changes in the task structure, an increased efficiency of performing individual task components, an increased efficiency of performing sequences of task components, or some combination of these mechanisms. We propose an extension to the existing theories by arguing that for many tasks, practice affects which information is processed. More specifically, we argue that people learn, over the course of practice, to separate task-relevant from task-redundant information, and to limit their processing to relevant aspects of the task. In three experiments, subjects verified alphabetic strings, such as M [4] R S T. Strings were correct if they followed the alphabet when the number of letters, given by the digit in parentheses, was skipped. Strings were constructed such that errors occurred only within the initial “letter–digit–letter” triplet. Analyses of subjects’ RTs for strings of varying lengths demonstrated that: (a) subjects were able to distinguish relevant from redundant task information, and to limit their processing to the relevant information, (b) the ability to reduce the amount of information that is processed takes time and develops gradually over the course of practice, and (c) the mechanism underlying this ability appears to be largely stimulus-independent in the sense that structural components of a task are ignored, rather than specific task information. The findings and their implications for general theories of skill acquisition are discussed.     

Mapping the Personality Psychopathology Five Domains Onto DSM–IV Personality Disorders in Dutch Clinical and Forensic Samples: Implications for DSM–5

The Personality Psychopathology Five (PSY–5) model represents 5 broadband dimensional personality domains that align with the originally proposed DSM–5 personality trait system, which was eventually placed in Section III for further study. The main objective of this study was to examine the associations between the PSY–5 model and personality disorder criteria. More specifically, we aimed to determine if the PSY–5 domain scales converged with the alternative DSM–5 Section III model for personality disorders, with a particular emphasis on the personality trait profiles proposed for each of the specific personality disorder types. Two samples from The Netherlands consisting of clinical patients from a personality disorder treatment program (n = 190) and forensic psychiatric hospital (n = 162) were used. All patients had been administered the MMPI–2 (from which MMPI–2–RF PSY–5 scales were scored) and structured clinical interviews to assess personality disorder criteria. Results based on Poisson or negative binomial regression models showed statistically significant and meaningful associations for the hypothesized PSY–5 domains for each of the 6 personality disorders, with a few minor exceptions that are discussed in detail. Implications for these findings are also discussed.     

Same Game, Different Rules? Gender Differences in Political Participation

We investigate gender gaps in political participation with 2004 ISSP data for 18 advanced Western democracies (N: 20,359) using linear and logistic regression models. Controlling for socio-economic characteristics and political attitudes reveals that women are more likely than men to have voted and engaged in ‘private’ activism, while men are more likely to have engaged in direct contact, collective types of actions and be (more active) members of political parties. Our analysis indicates that demographic and attitudinal characteristics influence participation differently among men and among women, as well as across types of participation. These results highlight the need to move toward a view of women engaging in differing types of participation and based on different characteristics.     

The role of task rules and stimulus–response mappings in the task switching paradigm

Switch costs occur whenever participants are asked to switch between two or more task sets. In a typical task switching experiment, participants have to switch between two task sets composed of up to four different stimuli per task set. These 2 (task sets) x 4 (stimuli) contain only 8 different stimulus-response (S-R) mappings, and the question is why participants base their task performance on task sets instead of S-R mappings. The current experiments compared task performance based on task rules with performance based on single stimulus-response mappings. Participants were led to learn eight different S-R mappings with or without fore-knowledge about two underlying task sets. Without task set information no difference between shifts and repetitions occurred, whereas introducing task sets at the beginning led to significant switch costs. Most importantly, introducing task sets in the middle of the experiment also resulted in significant switch costs. Furthermore, introducing task rules at the beginning of the experiment lead to slower RTs when simple stimuli (Experiment 1) had to be processed. This detrimental effect disappeared with more complex stimuli (Experiment 2). Results will be discussed with respect to cognitive control.     

“If I Didn't Have My Faith I Would Have Killed Myself!”: Spiritual Coping in Patients Suffering From Schizophrenia

Spirituality, religiousness, and existential thought were qualitatively investigated in six patients suffering from schizophrenia spectrum disorders. The present study is a deepening of a recently published quantitative investigation by Danbolt, Møller, Lien, and Hestad (2011) Danbolt, L., Møller, P., Lien, L. and Hestad, K. 2011. The personal significance of religiousness and spirituality in patients with schizophrenia. The International Journal for the Psychology of Religion, 21: 145–158. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar]. The patients in the present study were chosen on the basis of diversity as to how they experienced their spirituality to be of significance when coping with their disorder. The informants displayed many signs of spiritual struggle and transitional spiritual coping strategies, all of which seemed to be linked to hallucinatory experiences. Even though their spirituality met the criteria of religious delusions, the patients described their spirituality to have vital importance. The informants showed little spiritual preknowledge and seemed to be left alone without any clerical support in their spiritual struggle. This may underline the importance of including spiritual issues in the treatment of these patients.     

The implementation of contextual therapy in the therapeutic community for substance abusers: a case study

Family therapy takes a special position in the therapeutic community for substance abusers (TC). In the early therapeutic communities, the family of origin was not considered as important for the substance abuser's recovery process, and was even labelled as part of the problem. It was only in the 1970s that the TC acknowledged the significance of family involvement in treatment. Nowadays, the contextual vision of Ivan-Boszormenyi-Nagy seems to have a strong impact on family counselling activities in Belgian TCs.
In this article, the integration of contextual thinking in the TC is discussed. By means of a case study, it is shown that there are some clear parallels between the treatment evolutions in family counselling and the peer group community. The central position of trust both in contextual therapy and the TC treatment model is an important common ground for stimulating integration. Some obstacles that can disrupt this integration process are discussed.     

the role of personality in stress perception across different vocational types

In this study, the authors investigated the relationship between personality (measured by the subscales of the NEO Five‐Factor Inventory [NEO‐FFI]; Costa & McCrae, 1992) and stress (measured by the Overall Job Satisfaction scale [Warr, Cook, & Wall, 1979], and Cooper's Job Stress Scale [Cooper, 1981]) across different vocational types as described in Holland's (1966, 1997) theory. A sample of 729 employees participated in the survey. Individuals with high NEO‐FFI scores on neuroticism more often perceived distress across several vocational types. Individuals with high NEO‐FFI scores on conscientiousness more often perceived eustress across several vocational types. Extraversion was related to more eustress in Social and Conventional vocational types, openness to experience to more distress in Realistic and Social vocational types and to less eustress in Conventional vocational types; agreeableness was related to more eustress in Investigative and Conventional vocational types. A relation conclusively exists between personality and perception of distress and eustress for different vocational types.     

Testing overall and moderator effects in random effects meta‐regression

Random effects meta‐regression is a technique to synthesize results of multiple studies. It allows for a test of an overall effect, as well as for tests of effects of study characteristics, that is, (discrete or continuous) moderator effects. We describe various procedures to test moderator effects: the z, t, likelihood ratio (LR), Bartlett‐corrected LR (BcLR), and resampling tests. We compare the Type I error of these tests, and conclude that the common z test, and to a lesser extent the LR test, do not perform well since they may yield Type I error rates appreciably larger than the chosen alpha. The error rate of the resampling test is accurate, closely followed by the BcLR test. The error rate of the t test is less accurate but arguably tolerable. With respect to statistical power, the BcLR and t tests slightly outperform the resampling test. Therefore, our recommendation is to use either the resampling or the BcLR test. If these statistics are unavailable, then the t test should be used since it is certainly superior to the z test.