The continuous nature of timing reprogramming in an interceptive task

The time course of movement timing reprogramming was examined in a task requiring temporal coincidence of the conclusion of a forehand drive with the arrival of a moving luminous target at the end of an electronic trackway. The moving target departed from one end of the trackway at a constant velocity of 2 m (.) s(-1), and for a part of the trials its velocity was increased to 3 m (.) s(-1). Target velocity was modified at different moments during stimulus displacement, producing times-to-arrival after velocity increment (TAVIs) from 100 to 600 ms. The effect of specific practice on movement reprogramming was also examined. The results showed early adjustments to the action (TAVIs = 100 - 200 ms) that seemed to be stereotyped, while feedback-based corrections were implemented only at TAVIs of 300 ms or longer. Temporal accuracy was progressively increased as longer TAVIs were provided up to 600 ms. Skill training led to an overall increment of temporal accuracy, but no effect of specific practice was found. The results indicate that timing reprogramming in interceptive actions is a continuous process limited mainly by intrinsic factors: latency to initiate more effective adjustments to the action, and rate-of-movement timing reprogramming.     

The Development of Selective Copying: Children's Learning From an Expert Versus Their Mother

This study tested the prediction that, with age, children should rely less on familiarity and more on expertise in their selective social learning. Experiment 1 (N = 50) found that 5‐ to 6‐year‐olds copied the technique their mother used to extract a prize from a novel puzzle box, in preference to both a stranger and an established expert. This bias occurred despite children acknowledging the expert model's superior capability. Experiment 2 (N = 50) demonstrated a shift in 7‐ to 8‐year‐olds toward copying the expert. Children aged 9–10 years did not copy according to a model bias. The findings of a follow‐up study (N = 30) confirmed that, instead, they prioritized their own—partially flawed—causal understanding of the puzzle box.     

Professional learning as a predictor for instructional quality: a secondary analysis of TALIS

The purpose of this study is to examine the effect of teachers’ professional learning opportunities on instructional quality, which represents a combined approach of behaviorist, cognitivist, and constructivist principles in teaching. We incorporated professional learning communities (PLCs), professional development (PD) days, as well as 3 PD types (traditional, reform-based, and informal) to provide a comprehensive account of teachers’ professional learning opportunities. Using the extant large-scale data, the Teaching and Learning International Survey (TALIS), from 3,213 middle-school teachers in Turkey, we found that PLCs and reform-based PD activities produced statistically significant effects on instructional quality, ranging from high to moderate effects, all other PD variables held constant. Discussion on the results was centered on the schools for being a venue for professional learning and the potential of collaborative structures to promote teachers’ development.     

Debugging during block-based programming

In this study, we investigated the debugging process that early childhood preservice teachers used during block-based programing. Its purpose was to provide insights into how to prepare early childhood teachers to integrate computer science into instruction. This study reports the types of errors that early childhood preservice teachers commonly made and how they debugged the errors. Findings are discussed in relation to research and practice that could benefit from debugging instruction. This study provides directions for future computer science education research that aims to prepare teachers for programming, computational thinking, and STEM education. Though this study used robotics as a programming context, findings on early childhood preservice teachers’ debugging processes could be applicable to other contexts involving block-based programming.     

The Influence of Cognitive Complexity,Empathy, and Mindfulness on Person-Centered Message Evaluations

More than 30 years of research shows that highly person-centered (PC) supportive messages that validate and acknowledge the feelings of others are consistently viewed as more beneficial than less PC-based messages. There are, however, differences in how well people can distinguish high and low PC messages. We argue that the combined influence of motivational factors (i.e., empathy) and cognitive factors (i.e., cognitive complexity, mindfulness) significantly impacts how people process and evaluate support messages that vary in PC. Participants (n = 331) completed a survey, and structural equation modeling analyses revealed that both cognitive complexity and empathy predicted the extent to which people are able to differentiate more and less PC messages. Interestingly and in line with past research, mindfulness directly predicted empathy but not cognitive complexity.     

Non-linear resistance training reduces inflammatory biomarkers in persons living with HIV: A randomized controlled trial

The purpose of this study is to analyse the effect of 12 weeks of non-linear resistance training (NLRT) on anthropometry, muscle strength and inflammatory biomarkers in persons infected with human immunodeficiency virus (PIHIV). Thirty previously sedentary PIHIVs were randomized into the NLRT (n?=?15) and control (CON, n?=?15) groups. NLRT group were submitted to 12 weeks of training, whereas the CON group maintained their daily habits. At baseline and after 12 weeks, both groups underwent anthropometric evaluations and blood sampling for the analysis of inflammatory biomarkers. Analysis of covariance using preintervention values as covariate was performed to determine the effects of exercise on anthropometry, muscle strength, cytokines levels and T cells. Significance was set at p?p?p p?=?.009), blood levels of interleukin (IL)-1β (p?=?.029), IL-6 (p?=?.005), IL-8 (p?=?.010), and tumour necrosis factor (TNF)-α (p?=?.001) and an increase in muscle strength (p?p?=?.030) and CD4⁺ (p?=?.004) and CD8⁺ (p?相似文献   

“Anyone free to chat?” Using technological features to elicit quality support online

This study examines how support seekers can integrate verbal and nonverbal cues in social network sites (SNSs) to elicit quality support from others. Building from sensitive interaction systems theory and verbal person centeredness (VPC), participants (N?=?579) evaluated a SNS profile that contained manipulated levels of directness in status updates used to seek support and nonverbal emotional expression in profile pictures. To capture the transaction of support, participants provided supportive messages in public and private conditions that were coded for their level of VPC. Negative emotional cues in profile pictures increased VPC in private messages, whereas directness in status updates negatively predicted VPC in private messages. Participants produced messages with higher levels of VPC after they viewed profiles that incorporated more features to disclose distress effectively. Broadly, this study addresses whether the content people post on SNS profiles shapes the quality of the supportive messages they receive.