Differential reactions of virtual actors and observers to the triggering and interruption of psychological momentum

The present study compared virtual actors’ and observers’ perceptions of positive and negative psychological momentum (PM) and their responses to sudden interruptions of momentum. Participants with experience playing competitive table tennis imagined that they were playing a table tennis game (virtual actors), whereas participants who lacked experience playing competitive table tennis imagined that they were observing a table tennis game (observers). While viewing an audiovisual simulation of a table tennis match, participants were exposed to either an ascending (i.e., positive momentum) or descending (i.e., negative momentum) scoring sequence that was either suddenly interrupted or not interrupted at all. Participants’ PM perceptions were measured at the conclusion of the simulation. Results indicated that observers’ PM perceptions were lower than were virtual actors’ following the negative momentum sequence. More generally, interrupting positive momentum lowered PM perceptions, whereas interrupting negative momentum increased PM perceptions. Implications for the study of PM in sport are discussed.     

Inwardness and Sociability: A Reply to Carter

Carter argues that Wittgensteinian moral philosophy – typified by the work of Raimond Gaita and Christopher Cordner – rests on shaky foundations because it vacillates between grounding moral judgements in grammar and in a form of life. In this article, I respond to Carter's criticism. I defend Wittgensteinian moral philosophy by showing that Gaita and Cordner specifically repudiate the purported dichotomy between grammar and a form of life. I then go on to explain why Wittgensteinian moral philosophers are right not to try to ground moral judgements in features of a shared form of life.     

Collecting response times using Amazon Mechanical Turk and Adobe Flash

Crowdsourcing systems like Amazon’s Mechanical Turk (AMT) allow data to be collected from a large sample of people in a short amount of time. This use has garnered considerable interest from behavioral scientists. So far, most experiments conducted on AMT have focused on survey-type instruments because of difficulties inherent in running many experimental paradigms over the Internet. This study investigated the viability of presenting stimuli and collecting response times using Adobe Flash to run ActionScript 3 code in conjunction with AMT. First, the timing properties of Adobe Flash were investigated using a phototransistor and two desktop computers running under several conditions mimicking those that may be present in research using AMT. This experiment revealed some strengths and weaknesses of the timing capabilities of this method. Next, a flanker task and a lexical decision task implemented in Adobe Flash were administered to participants recruited with AMT. The expected effects in these tasks were replicated. Power analyses were conducted to describe the number of participants needed to replicate these effects. A questionnaire was used to investigate previously undescribed computer use habits of 100 participants on AMT. We conclude that a Flash program in conjunction with AMT can be successfully used for running many experimental paradigms that rely on response times, although experimenters must understand the limitations of the method.     

There is more to green reading than meets the eye! Exploring the gaze behaviours of expert golfers on a virtual golf putting task

Gaze patterns and verbal reports of golfers at three skill levels (professional, elite amateur and club) were recorded as they read the slope of a virtual golf green from six different positions. The results showed that the professional golfers used a more economical gaze pattern consisting of fewer fixations of longer duration than the amateur and club players. Gaze pattern was accompanied by verbal reports that were not significantly more accurate in terms of aiming accuracy, although the professionals were accurate on 76.5 % of putts compared to 57.1 % for the elite and club groups. Two read positions lead to more accurate predictions by the professional golfers only, suggesting distinctive periods of visual perceptual–cognitive attention may underly higher levels of putting skill. Theoretical implications of these results are discussed in relation to the application of visual attention theory to practise, as well as suggestions provided for further research.     

Imaging Brain Effects of APOE4 in Cognitively Normal Individuals Across the Lifespan

The ε4 allele of the apolipoprotein E (APOE4) is associated with an increased risk of developing Alzheimer’s disease (AD). Hence, several studies have compared the brain characteristics of APOE4 carriers versus non-carriers in presymptomatic stages to determine early AD biomarkers. The present review provides an overview on APOE4-related brain changes in cognitively normal individuals, focusing on the main neuroimaging biomarkers for AD, i.e. cortical beta-amyloid (Aβ) deposition, hypometabolism and atrophy. The most consistent findings are observed with Aβ deposition as most studies report significantly higher cortical Aβ load in APOE4 carriers compared with non-carriers. Fluorodeoxyglucose-positron emission tomography studies are rare and tend to show hypometabolism in brain regions typically impaired in AD. Structural magnetic resonance imaging findings are the most numerous and also the most discrepant, showing atrophy in AD-sensitive regions in some studies but contradicting results as well. Altogether, this suggests a graded effect of APOE4, with a predominant effect on Aβ over brain structure and metabolism. Multimodal studies confirm this view and also suggest that APOE4 effects on brain structure and function are mediated by both Aβ-dependent and Aβ-independent pathological processes. Neuroimaging studies on asymptomatic APOE4 carriers offer relevant information to the understanding of early pathological mechanisms of the disease, although caution is needed as to whether APOE4 effects reflect AD pathological processes, and are representative of these effects in non-carriers.     

Barriers to Learning Motivational Interviewing: A Survey of Motivational Interviewing Trainers' Perceptions

Trainers reported that motivational interviewing (MI)–inconsistent behaviors were frequently perceived during training and believed to create barriers to learning. More barriers were perceived in corrections than in mental health training audiences. Strategies to facilitate unlearning MI‐inconsistent behaviors may accelerate acquisition of MI.     

Psychotropic Medication Patterns in Medicaid-Insured Youth Based on Clinician-Reported Maltreatment Status

The main objective of this study is to explore the relationship of psychotropic medication use patterns and clinician-reported maltreatment status in Medicaid-insured youth. This cross-sectional study analyzed computerized outpatient claims for youth aged 2–17 years who were continuously enrolled for ≥10 months in a mid-Atlantic state Medicaid program in 2006. Bivariate analyses and multivariable logistic modeling were employed to assess patterns of any psychotropic drug use, and specifically for antipsychotics, antidepressants, and stimulants by clinician-reported maltreatment status and according to other study covariates. Child maltreatment status was assessed using ICD-9 codes for maltreatment. Other covariates included age group, gender, race/ethnicity, region, Medicaid-eligibility categories, and clinician-reported psychiatric diagnostic groups. Among 274,490 youth, 901 had a clinician-reported child maltreatment indicator for a prevalence of 3.3 per 1,000. These youth were more likely to be older, female, African American, and Medicaid eligible by foster care or disability. Youth with clinician-reported maltreatment compared to youth without identified maltreatment had a significantly higher prevalence of antipsychotic use (14.1 vs. 3.4 %), antidepressant use (12.1 vs. 3.4 %) and stimulant use (15.8 vs. 7.8 %). After adjusting for the study covariates, the odds of antipsychotic use (2.6 [2.0, 3.2]), antidepressant use (2.0 [1.6, 2.6]), and any psychotropic use (1.5 [1.3, 1.9]) were comparatively higher among youth with clinician-reported maltreatment. By contrast, the adjusted-odds of stimulant use was comparable between the groups. The findings from this exploratory study from one state’s Medicaid outpatient data suggest that youth with maltreatment indicators have an increased likelihood of antipsychotic and antidepressant medication dispensings.     

Routine Depression Screening in an MS Clinic and Its Association with Provider Treatment Recommendations and Related Treatment Outcome

Depression, a frequent concomitant disorder in multiple sclerosis (MS), can impact MS treatment adherence and quality of life. Depression screening in MS care settings may facilitate needed intervention when providers are responsive to screening findings. This study sought to examine the relationship between depression screening results and provider depression treatment recommendations documented in the medical records of 283 patients receiving care in an integrated MS clinic. Forty-six percent of patients screening positive for depression received a treatment recommendation; females, those with past mental health diagnoses, on psychotropic medications, and those with higher symptom severity were more likely to receive a treatment recommendation. On subsequent screenings, patients reported fewer depressive symptoms regardless of whether a formal treatment recommendation was documented. These findings suggest that while depression screening does lead to depression related intervention in many cases, more research is necessary to determine who is most likely to benefit and under what conditions.     

Selective memories: infants' encoding is enhanced in selection via suppression

The present study examined the hypothesis that inhibitory visual selection mechanisms play a vital role in memory by limiting distractor interference during item encoding. In Experiment 1a we used a modified spatial cueing task in which 9‐month‐old infants encoded multiple category exemplars in the contexts of an attention orienting mechanism involving suppression (i.e. inhibition of return, IOR) versus one that does not (i.e. facilitation). At test, infants in the IOR condition showed both item‐specific learning and abstraction of broader category information. In contrast, infants in the facilitation condition did not discriminate across novel and familiar test items. Experiment 1b confirmed that the learning observed in the IOR condition was specific to spatial cueing of attention and was not due to timing differences across the IOR and facilitation conditions. In Experiment 2, we replicated the results of Experiment 1, using a within‐subjects design to explicitly examine learning and memory encoding in the context of concurrent suppression. These data show that developing inhibitory selective attention enhances efficacy of memory encoding for subsequent retrieval. Furthermore, these results highlight the importance of considering interactions between developing attention and memory systems.     

Adult Age Differences in the Access and Deletion Functions of Inhibition

ABSTRACT

This study examined age differences in working memory using a delayed-matching-to-sample (DMTS) task. Based on the inhibitory decline hypothesis, which posits that older adults are more susceptible to interference, age differences were expected to be greater for older adults when irrelevant information was present during encoding. Two experiments tested both the access and deletion functions of inhibition. In both experiments, performance was equated for older and younger participants on a no-interference version of the DMTS task to control for age differences in encoding information into working memory. Results consistently showed equivalent effects of distraction for older and younger adults regardless of the difficulty of the perceptual discrimination of targets and distractors, the degree of processing of the distractors, or the semantic relationship between targets and distractors. These results support theories that propose age differences in encoding to explain age differences in working memory, and are inconsistent with theories that propose that older adults are more susceptible to interference than younger adults.