Constant or variable practice: recreating the especial skill effect

An especial skill occurs when performance of a single action from within a class of actions produces an advantage in performance. This advantage in a single action over others in the class is presumed to result from large amounts of practice performing the specific action (Keetch, Schmidt, Lee, & Young, 2005). In an experiment involving the learning of a basketball set shot, practice was manipulated to identify whether an especial skill effect emerges at the free-throw line as a result of constant practice conditions in novice performers. After a pretest, which involved set shots across five distances, participants were randomly assigned to one of two intervention groups. A constant practice group (n=10) performed 300 trials of the set shot at the 15 ft free throw line only, whereas a variable practice group (n=10) performed 300 trials across five distances. Shot accuracy increased for both groups as a result of practice at the 15' distance. However, on the posttest, a significant difference was reported between actual and expected scores for the constant practice group only. This finding provided evidence that an effect similar to that seen for especial skills emerges as a result of constant practice. Although an especial skill effect could result from massive amounts of practice, we show it can emerge as a result of short term repetitive practice, indicating that the type, rather than amount, of practice is important.     

Investigating the Factor Structure of the Kessler Psychological Distress Scale in Community and Clinical Samples of the Australian Population

The Kessler 10 Psychological Distress Scale (K10) is a brief dimensional scale designed to measure and monitor trends of psychological distress. Recently the scale has been utilised by general practitioners and clinicians to screen for common mental disorders and measure treatment outcomes. Despite the K10 demonstrating a sound one dimensional structure in the general population, the scale??s structure has yet to be comprehensively tested in clinical samples. The current study aimed to use confirmatory factor analysis to test three theoretical structure models of the K10 and one model for the K6 (a six item variant) in a sample from a tertiary referral clinic for mood and anxiety disorders and compare those results with a population sample from the Australian National Survey of Mental Health and Wellbeing. The results demonstrated that a two factor model with correlated latent factors representing depression and anxiety fit the clinical sample the best whilst a one factor model with correlated errors between several items fit the population sample the best. The results are discussed further in relation to scoring and interpreting the Kessler scales.     

Going Gaga: Investigating,Creating, and Manipulating the Song Stuck in My Head

Summary: Having a song stuck in your head is a commonly experienced intrusive thought. We explored the intrusive song phenomenon through a survey, an experimental diary study, and three laboratory experiments. Contrary to the belief that only obnoxious songs get stuck, we found that songs people know and like frequently became intrusive. We also found that intrusive songs followed environmental cues. In addition, if a song continued to play in someone's head immediately after listening to it, the song was likely to return as an intrusive song within the next 24 hours. Similar to mind wandering, the return of intrusive songs depended on cognitive resources: people reported that intrusive songs returned during low cognitive load activities, and we found that overloading the cognitive systems with challenging activities increased intrusive song frequency. Throughout our studies, we easily created and manipulated intrusive song experiences. Songs provide a valuable method to investigate intrusive thoughts. Copyright © 2012 John Wiley & Sons, Ltd.     

Interreligious prayer between Christians and Muslims

This article distinguishes various ways in which the term ‘pray together’ might be understood and focuses on ‘interreligious prayer’, by which is meant here praying together using the same words with two religious groups united in heart and mind, rather than ‘multireligious prayer’, which refers to prayer in the presence of another religious group. The article argues that, in the early literature on the matter, there is a danger of conflating the two different types, and then shows that some Catholic communities, following the initiatives of Pope John Paul II, have reached a consensus that interreligious prayer is problematic, while multireligious prayer is not. The article goes on to consider an essay by Joseph Ratzinger, which discusses the preconditions for interreligious prayer and is very sceptical about its possibility, except perhaps for Christians and Jews. Finally, one of Ratzinger's preconditions for interreligious prayer is used to examine the possible grounds for interreligious prayer between Christians and Muslims, and the article argues that the door is as yet neither closed nor open.     

The effect of state anxiety on the online and offline control of fast target-directed movements

In target-directed aiming, afferent information is used to adjust limb trajectories during movement execution (i.e. online) and to enhance the programming of subsequent trials (i.e. offline). The objective of the present study was to determine the influence of state anxiety on both online and offline afferent information processing for the first time. Participants practiced either a directional aiming task (Experiment 1) or an amplitude aiming task (Experiment 2) without anxiety before being transferred to a high anxiety condition. In both experiments, results revealed that anxiety resulted in a decrement in performance. Furthermore, use of afferent information to adjust movement trajectories online was disrupted when movements were performed with anxiety, whereas there were no differences in the offline processing of afferent information between the low anxiety and high anxiety conditions.     

Beyond conscientiousness: Career optimism and satisfaction with academic major

The study focuses on psychological predictors of academic major satisfaction. According to the career construction theory (Savickas, 2005), vocational personality and career adaptability should generate career satisfaction. In this study, vocational personality was operationalised as Big Five conscientiousness, and career adaptability was operationalised as generalised self-efficacy and career optimism. A sample (N = 529) of university students completed an online survey. The resultant data were used to construct a structural model of the hypothesised relationships among variables. A good fitting model [χ² = 10.454 (7) p = .164; GFI = .993; CFI = .999; RMSEA < .031 (< .001–.066)] indicated that career optimism fully mediated the relationship between conscientiousness and academic major satisfaction. Results were consistent with previous research into personality and academic performance. Moreover, the results highlight the significant role of optimism in satisfaction with career generally, and studies, specifically. Suggestions are made for future research into modelling the relationships according to different academic disciplines and for the potential role of optimism as a learning objective for career education and counseling.     

Flashbulb memories? The effects of when the initial memory report was obtained

Why have some researchers found reports of flashbulb memories to be stable, while others have observed inconsistencies? Paradoxically, it appears that relatively long delays between event and initial documentation have produced greater consistency of participants' reports. To investigate this directly, we collected the initial documentation of hearing about O.J. Simpson's acquittal either five hours or one week after the acquittal was read. Observed consistency of memories varied as a function of documentation time; following an eight-week retention, the delayed reports were more consistent. The delayed group also reported fewer propositions in their initial documentation. We proposed a consolidation model to explain these results: during the days immediately following a newsworthy event, the narrative structure of these memories changes in that some details are forgotten. After this consolidation period, the memories may solidify. Thus, it may have been easier for the delayed group to provide consistent memories at the two intervals.     

Parental Illness Encouragement Behavior Among Children with Functional Gastrointestinal Disorders: A Factor Analysis with Implications for Research and Clinical Practice

The objective of the current study was to assess the factor structure of the Illness Behavior Encouragement Scale (IBES) by Walker and Zeman (1992) among children with functional gastrointestinal disorders (FGIDs). Two hundred seventy nine children (63 % female), and 135 primary caregivers (90.8 % mothers), recruited from a large Midwestern children’s hospital completed the IBES, a 12-item measure of parental behavior in response to abdominal pain episodes. Findings suggested the IBES possesses two conceptually distinct scales that are invariant across parent self- and child-report, and are consistent with previous factor analysis in a Dutch sample of children with headaches. Different types of parental behaviors exist that naturally cluster and diverge in reliable ways. Future research is warranted to determine if these different types of parental behavior may differentially influence illness outcomes among children with FGIDs.