Rapid Aimed Limb Movements: Differential Effects of Practice on Component Submovements

Three experiments are reported in which subjects practiced rapid aimed limb movements (arm pointing and wrist rotation) toward a visible target region. Subjects were required to minimize their movement durations while still landing in the target. The movement trajectories were examined to assess the effects of practice on separate component submovements of the limb movements. The results revealed that practice improved primarily temporal, not spatial, aspects of performance. Practice reduced the overall movement durations, but had different effects on the individual submovements: Practice allowed subjects to reduce the amount of time spent performing final corrective submovements, but actually increased slightly the time needed to produce the initial ballistic submovement. The results suggest that practice in the present task primarily enhanced the ability to use feedback information, but there was also some evidence of changes in the ballistic, preprogrammed portion of the movements. The results demonstrate that analysis of submovements can reveal important details of the underlying motor control processes.     

A Reliability Generalization Study of Coefficient Alpha for the Life Orientation Test

The Pd, K and L scales of the MMPI and four of Kolberg's Moral Judgment Situations were administered to three criterion groups; adolescent delinquents, college students, and individuals belonging to a therapy collective which provides free community service. Greater than 50% of both the delinquent and therapy collective subjects were classified as psychopathic, (Pd + K T score > 70). The three subject groups obtained significantly different moral maturity scores with the therapy collective subjects receiving the highest moral maturity mean score. The results of two stepwise regression analyses found no relationship between Pd scores and moral maturity scores.     

The Varieties of Wonder

Although wonder is a response to what is extraordinary or regarded as such, this covers a variety of things. Hence, wonder covers a spectrum from mere surprise or puzzlement to stronger responses like dread or amazement; moreover, it is often linked to other powerful responses like fear or admiration, and it can lead people into many pursuits and areas of reflection. I look at the variety of the objects of wonder, and of the neighbouring responses and conceptual connections found here, then I discuss the response of wonder itself, and its causes and effects. Finally, I ask why the sense of wonder can atrophy, and whether it can be suppressed deliberately.     

Latent self-oriented and socially prescribed perfectionism: Tests of factorial,convergent, and discriminant validity using self- and informant reports

Using latent variables for self-oriented perfectionism (i.e., demanding perfection of oneself) and socially prescribed perfectionism (i.e., perceiving others are demanding perfection of oneself) has advantages. However, few studies have specifically examined the psychometric properties of these latent variables. The present study addresses this shortcoming by testing the factorial, convergent, and discriminant validity of self-oriented and socially prescribed perfectionism latent variables using self- and informant reports. It was hypothesized that (a) the factor structure of the self-oriented and socially prescribed perfectionism latent variables would be supported, (b) self- and informant reports would moderately converge, and (c) the self-oriented and socially prescribed perfectionism latent variables would be discriminable. A sample of 242 undergraduate women and 378 informants (218 mothers, 160 fathers) was recruited. Undergraduate women completed self-reports, and mothers and fathers completed informant reports. Results were consistent with hypotheses, thereby supporting (a) the factorial validity of the self-oriented and socially prescribed latent variables using self- and informant reports, (b) the convergent validity of the self-oriented and socially prescribed latent variables via moderately to strongly correlated self- and informant reports, and (c) the discriminant validity of the self-oriented and socially prescribed perfectionism latent variables. Findings suggest research using these latent variables is warranted.     

Repeated measurement of salivary cortisol within and across days among shy young adults

Temperamental shyness emerges early in childhood and remains relatively stable throughout development and has been associated with high and low levels of the stress hormone cortisol. Studies examining the relation between shyness and cortisol have been limited because they have traditionally collected only one measure of cortisol on a single day in the laboratory, restricting the reliability and diurnal profile of the measure in the participant’s everyday environment. We collected 15 saliva samples across three separate days (i.e., upon waking, +60 min post-waking, +8 h post-waking, +10 h post-waking, and bedtime) in a sample of healthy young adults selected for high and low shyness in order to characterize a portion of the diurnal cortisol rhythm. Overall, shy individuals demonstrated relatively lower cortisol across the day and across multiple mornings than non-shy adults. Higher self-reported social anxiety across multiple measures was also related to lower total cortisol levels across all participants. The present study replicates and extends our previous findings of low salivary cortisol measured in the laboratory in shy adults to repeated measurement in their everyday environments.     

Do interpersonal features of social anxiety influence the development of depressive symptoms?

This study is a prospective examination of possible interpersonal features of social anxiety that might predict increases in depressive symptoms. It was hypothesised that social anxiety would be associated with avoidance of expressing emotion, lack of assertion, and interpersonal dependency and that these dysfunctional interpersonal styles would predict depressive symptoms one year later while controlling for Time 1 depressive symptoms. One hundred and two undergraduates completed interview and self-report measures of these interpersonal styles in addition to measures of social anxiety and depressive symptoms. Results indicated that social anxiety was associated with all three interpersonal styles. However, only avoidance of expressing emotions predicted Time 2 depressive symptoms. Theoretical implications of these results are discussed.     

The Validity of Receptive and Expressive Vocabulary Measures with Spanish-Speaking Kindergarteners Learning English

Research examined construct meaning and validity for two new measures of receptive and expressive vocabulary for Spanish-speaking kindergarteners learning English. Substantive validity and generalizability of score meaning was assessed by examining correlations between an established measure (Peabody Picture Vocabulary Test–PPVT) and new measures (Stanford English Language Proficiency Test–SELP; Dynamic Indicators of Basic Early Literacy Skills, Word Use Fluency, DIBELS–WUF). Positive correlations between the SELP and PPVT supported validity of the SELP as a measure of receptive and expressive vocabulary for these children. DIBELS–WUF results were less clear with lower correlations between the PPVT raising questions about appropriateness.     

“I Tried to Make it not Confusing by Fixing it”: Describing Six First Graders’ Use of Strategies to Understand Text

This study describes six first-grade students’ use of metacognitive strategies. The students (4 boys and 2 girls) represented low, average, and above-average readers and were enrolled in a rural Midwestern elementary school. A variety of data were collected throughout the year: (a) an informal reading inventory and metacognitive awareness interview were conducted at the beginning and end of the year; and (b) during the school year, think-aloud interview protocols, running records, anecdotal notes, and retellings were conducted. The analysis revealed that these first graders were reporting and using a variety of strategies to read.     

Cognitive-behavioral therapy and decision science

In recent decades cognitive-behavioral therapy (CBT) and decision science (DS) have emerged within the field of psychological science. Though these are two vastly different areas of study, they are similar in that they address human information processing, cognition, behavior, and the link between them. In this article, we provide brief summaries of CBT and decision science, discuss their similarities and differences, and discuss how future research can identify ways in which these fields can inform each other. Several CBT techniques that might be of use to the efforts of the decision science field to prevent cognitive biases are suggested. Research that integrates these two fields may lead to the improvement of both.