Strategies in probabilistic categorization: results from a new way of analyzing performance

The "Weather Prediction" task is a widely used task for investigating probabilistic category learning, in which various cues are probabilistically (but not perfectly) predictive of class membership. This means that a given combination of cues sometimes belongs to one class and sometimes to another. Prior studies showed that subjects can improve their performance with training, and that there is considerable individual variation in the strategies subjects use to approach this task. Here, we discuss a recently introduced analysis of probabilistic categorization, which attempts to identify the strategy followed by a participant. Monte Carlo simulations show that the analysis can, indeed, reliably identify such a strategy if it is used, and can identify switches from one strategy to another. Analysis of data from normal young adults shows that the fitted strategy can predict subsequent responses. Moreover, learning is shown to be highly nonlinear in probabilistic categorization. Analysis of performance of patients with dense memory impairments due to hippocampal damage shows that although these patients can change strategies, they are as likely to fall back to an inferior strategy as to move to more optimal ones.     

Long ago it was meant to be: the interplay between time, construal, and fate beliefs

Fate means that an event was meant to be, that is, predetermined by prior unseen forces. Most people believe in fate, which seems at odds with similarly pervasive beliefs that alternative past actions would have brought about different circumstances (i.e., counterfactual beliefs). Two experiments revealed that construal level accounts for the relative plausibility of fate versus counterfactual explanations. Construal was manipulated in Experiment 1, such that goal pursuits framed in abstract ("why?") as opposed to concrete ("how?") terms heightened fate but not counterfactual attributions. Extending this finding, Experiment 2 showed that fate judgments were higher for temporally distant than recent past events, an effect mediated by construal perceptions. Neither counterfactual nor luck judgments varied with temporal distance. These findings help to explain how individuals explain complicated yet meaningful life events while extending the reach of Trope and Liberman's (2003) construal-level theory.     

Deficits on the Continuous Performance Test within the schizophrenia spectrum and the mediating effects of family history of schizophrenia

Individuals with schizophrenia spectrum personality disorders (SSPD) and schizophrenia show similar cognitive impairments. The authors examined the contributions of SSPD symptoms and familial risk for schizophrenia to impairments on the Continuous Performance Test--Identical Pairs Version. Participants included 103 schizophrenia patients, 66 first-degree relatives (29 SSPD), and 103 community controls (26 SSPD) screened for family history of psychosis. Patients and SSPD relatives performed significantly worse than non-SSPD relatives and SSPD and non-SSPD community controls. No differences in performance were observed among non-SSPD relatives and SSPD and non-SSPD community controls. Results suggest a continuum in which risk for schizophrenia-related cognitive impairments is highest among patients and SSPD relatives, intermediate among non-SSPD relatives, and lowest among SSPD and non-SSPD community controls. Results suggest that SSPD in the absence of a family history of psychosis may be a phenocopy.     

Multidimensional comparison of anxiety direction and burnout over time

The purpose of this study was to assess if athletes who perceived their trait anxiety to be debilitative to performance also experienced higher burnout over a competitive season. Volunteers were 53 NCAA Division I and II male (n = 14) and female (n = 39) athletes, ages 18 to 23 years. Participants completed a trait version of the Competitive State Anxiety Inventory-2D once and the Athlete Burnout Questionnaire three times during the season. A 2 (anxiety direction group) x 3 (time of season) multivariate analysis of variance indicated no significant interaction and no main effect for time of season. A significant main effect for anxiety direction group did emerge, with the Facilitative group reporting significantly lower Burnout scores overall on the Reduced Sense of Accomplishment scale than the Debilitative group. There were no differences found on the other two subscales, Emotional/Physical Exhaustion and Devaluation.     

Frequency of stuttering during challenging and supportive virtual reality job interviews

This paper seeks to demonstrate the possibility of manipulating the frequency of stuttering using virtual reality environments (VREs). If stuttering manifests itself in VREs similarly to the way it manifests itself in real world interactions, then VREs can provide a controlled, safe, and confidential method for treatment practice and generalization. Though many researchers and clinicians recognize the need for generalization activities in the treatment of stuttering, achieving generalization in a clinical setting poses challenges to client confidentiality, safety, and the efficient use of a professionals’ time. Virtual reality (VR) technology may allow professionals the opportunity to enhance and assess treatment generalization while protecting the safety and confidentiality of their clients. In this study, we developed a VR job interview environment which allowed experimental control over communication style and gender of interviewers. In this first trial, persons who stutter (PWS) experienced both challenging and supportive VR job interview conditions. The percentage of stuttered syllables was calculated for both interviews for each participant. Self-reported ratings of communication apprehension and confidence were also obtained, and were not significantly correlated with stuttering severity. Results indicated that interviewer communication style affected the amount of stuttering produced by participants, with more stuttering observed during challenging virtual interviews. Additionally, the amount of stuttering observed during the VR job interviews was significantly, positively correlated with the amount of stuttering observed during an interview with the investigator prior to VR exposure. Participants’ subjective reports of the VR experience indicate reactions similar to those they report experiencing in the real world. Possible implications for the use of VR in the assessment and treatment of stuttering are discussed.

Educational objectives: After reading this article, the reader will be able to—(1) list some of the challenges to treatment generalization; (2) describe how virtual reality technology can assist in alleviating some of these challenges; (3) describe how the frequency of stuttering varies across two different virtual environments.     

Does a regional accent perturb speech processing?

The processing costs involved in regional accent normalization were evaluated by measuring differences in lexical decision latencies for targets placed at the end of sentences with different French regional accents. Over a series of 6 experiments, the authors examined the time course of comprehension disruption by manipulating the duration and presentation conditions of accented speech. Taken together, the findings of these experiments indicate that regional accent normalization involves a short-term adjustment mechanism that develops as a certain amount of accented signal is available, resulting in a temporary perturbation in speech processing.     

Interrupted visual searches reveal volatile search memory

This study investigated memory from interrupted visual searches. Participants conducted a change detection search task on polygons overlaid on scenes. Search was interrupted by various disruptions, including unfilled delay, passive viewing of other scenes, and additional search on new displays. Results showed that performance was unaffected by short intervals of unfilled delay or passive viewing, but it was impaired by additional search tasks. Across delays, memory for the spatial layout of the polygons was retained for future use, but memory for polygon shapes, background scene, and absolute polygon locations was not. The authors suggest that spatial memory aids interrupted visual searches, but the use of this memory is easily disrupted by additional searches.     

Six-year follow-up of three treatment programs to personality disorder

Previous studies of long-term outcome for personality disorder (PD) were either retrospective in design or did not include a control condition. In this paper we report results for three PD cohorts (N = 111) treated in two different specialist psychosocial programs (step-down and long-term inpatient) and in general psychiatric treatment as usual (TAU), which were prospectively followed up for 72-months after intake. The three PD samples were compared on symptom severity, social adjustment, global functioning and other clinical indicators (self-mutilation, parasuicide and readmission rates) at intake, 6, 12, 24, and 72 months. Results indicated that a specialist step-down model showed significantly greater change than a purely inpatient model and TAU in most key dimensions of functioning, a difference maintained at 72-months follow-up. Improvement in the samples was not associated with amount of intercurrent treatment received in the year prior to the follow-up assessment. This study confirms that a step-down program retains significant improvement associated with a specialist psychosocial approach for PD. However, this conclusion should be qualified by design limitations. The samples were not randomly allocated to the three conditions and the naturalistic geographical allocation used in the study created a potential for a number of confounds. Whilst we used extensive statistical controls, the possibility that the differences found between the groups may be due to population differences cannot be discounted.     

P-E Fit as moderator of the accountability – employee reactions relationships: Convergent results across two samples

The current two-sample investigation, which incorporated Conservation of Resources (COR) and Person-Environment (P-E) fit theories, investigated the interaction effects of felt accountability × P-E fit on the work outcomes of job satisfaction, organizational commitment, depressed mood, and work intensity. Consistent with the conceptual underpinnings of felt accountability as either a threat or opportunity, satisfaction, work intensity, and organizational commitment increased in settings possessing both heightened answerability and high levels of P-E fit. Further, individuals reported a reduction in depressed mood when heightened accountability was coupled with high P-E fit perceptions. These findings were consistent across samples providing evidence of generalizability. Implications, strengths and limitations, and directions for future research are discussed.