A learner corpus analysis: Effects of task complexity, task type, and L1 & L2 similarity on propositional and linguistic complexity

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Elissa Allaw
Keyword(s):  
Task Complexity ◽  
Experimental Studies ◽  
Task Design ◽  
Task Type ◽  
Interactive Effects ◽  
Design Features ◽  
Significant Interaction Effect ◽  
Learning Platform ◽  
Written Texts ◽  
Propositional Complexity

Abstract Learner corpora provide researchers with a rich pool of resources that can complement experimental studies. The purpose of the present paper is to provide task complexity researchers, for the first time, with further insight regarding interactive effects of task complexity, task type, task modality, and L1 background on linguistic and propositional complexity. Analyzing 720 intermediate-level (B1) written texts that were extracted from open access online language learning platform, the EF-Cambridge Open Language Database (EFCAMDAT) revealed that there was a significant interaction effect among task design features (task complexity, task type, and L1 background) that influenced linguistic and propositional complexity of written texts. This suggests that task complexity does not function in isolation of other task design features such as task type and L1 background.

Collectivistic Leadership in Context: An Examination of How and When Collective Charismatic Leadership Relates to Unit Functioning

2021 ◽  
pp. 154805182098653
Author(s):  
Jonathan C. Ziegert ◽  
David M. Mayer ◽  
Ronald F. Piccolo ◽  
Katrina A. Graham
Keyword(s):  
Social Inclusion ◽  
Task Complexity ◽  
Contextual Factors ◽  
Negative Relationship ◽  
Field Studies ◽  
Charismatic Leadership ◽  
Interactive Effects ◽  
Collective Leadership ◽  
Contingency Perspective ◽  
The Impact

This research explores the nature of collective leadership by examining the boundary conditions of how and when it relates to unit functioning. Building from a contingency perspective that considers the impact of contextual factors, we propose that collective charismatic leadership will be associated with lowered unit conflict, and this relationship will be strengthened by the contingency elements of individual charismatic leadership, task complexity, and social inclusion. Furthermore, we propose that the interactions of collective charismatic leadership with these contextual factors will relate to performance and satisfaction through conflict. We examine our hypotheses across two unit-level field studies, and the results illustrated that high levels of these contextual factors enhanced the negative relationship between collective charismatic leadership and conflict, which generally mediated the relationships between these interactive effects and performance and satisfaction. The results also highlight the detrimental aspects of collective leadership and how it can relate to reduced unit functioning when it is not aligned with an appropriate context. Overall, these findings begin to provide a more complete picture of collective leadership from a contingency perspective through a greater understanding of when and how it is related to unit functioning.

scholarly journals Underlying motivations for the use of linguistic disguise in written English and German threats and ransom demands in an experimental corpus

2018 ◽  
Vol 41 (2) ◽  
pp. 205-226
Author(s):  
Karoline Marko
Keyword(s):  
Language Production ◽  
Experimental Studies ◽  
Metalinguistic Awareness ◽  
Successful Implementation ◽  
Linguistic Awareness ◽  
Written Texts ◽  
Production Experiment ◽  
Actual Use

This paper addresses the problem of disguise in written threatening messages and investigates the connection between (meta-)linguistic awareness and the successful implementation of disguise strategies through the use of two experimental studies. The first study, a language production experiment with 116 participants, focused on the actual use of disguise strategies in the participants’ written texts. The second study, which had 167 respondents, was designed to investigate the perception of threats and respondents’ awareness and ideas of disguise. The findings of these studies indicate that sociolinguistic and metalinguistic awareness, awareness of one's own language production and the ability to manipulate language in other than outer forms of words are closely connected, which has important implications for forensic authorship analyses. Bredthauer (2013) estimated that approximately 20% of the authentic threatening messages in her corpus contained some form of disguise.

scholarly journals FEATURES OF EXPERT RESEARCH ON THE EFFECTS OF LOCK PICK ON THE INNER SURFACES OF CYLINDER MECHANISMS OF LOCKS

2019 ◽  
Vol 20 (2) ◽  
pp. 292-308
Author(s):  
V. Chernov ◽  
Е. Golomisyuk ◽  
Р. Evseev
Keyword(s):  
Experimental Study ◽  
Experimental Studies ◽  
Design Features ◽  
Foreign Objects ◽  
False Conclusion ◽  
Internal Surfaces ◽  
Criminal Offenses ◽  
Trace Formation ◽  
Expert Study

The features of the expert study of traces from the effects of foreign objects on the inner surfaces of the cylinder mechanisms are considered. With the trasological examination of locks, most experts after examining the external and internal surfaces of the cylinder mechanisms of locks, unlocked by various types of keys, falsified or selected keys, ambiguously understand the mechanism of their trace formation, which can sometimes lead to a false conclusion. The purpose of the work is to present the results of the investigation of the mechanism of trace formation and localization of signs of exposure of foreign objects (lock pick, selected or fake keys) on the internal surfaces of the cylinder mechanisms of locks and recommendations to forensic experts in drawing conclusions during the course of the Trasological research. The mechanism of trace formation is considered, the characteristic and classification of traces of exposure to foreign objects are provided (lock pick, selected or fake keys). Groups of lock pick are identified, which are most often found in the Commission of criminal offenses, for their further research. A number of experimental studies have been carried out to study and analyze the mechanism of trace formation, as well as to localize the signs of influence of certain groups of lock pick on the internal surfaces of the cylinder mechanisms of the lock. The progress of the experimental studies has been described in stages. The results of the research on the opening of the cylinder mechanisms of locks are presented with various types of lock pick, depending on their design features. The illustrations explain the conditions for the location of traces on the relevant parts of the cylinder mechanisms of locks from the influence of the respective groups of lock pick. The results of an experimental study are summarized and conclusions are made on the possible conditions for the mechanism of trace formation. Recommendations to judicial experts on the formulation of conclusions in the course of trasological studies of cylinder locking mechanisms are proposed.

scholarly journals EXPERIMENTAL FACILITY FOR THE STUDY OF THE PROCESSES IN MIXING LOW-PRESSURE HEATERS OF K-1000-60/3000 TURBINES

2020 ◽  
Vol 2 (61) ◽  
pp. 42-50
Author(s):  
A. Smychok ◽  
◽  
V. Gerliga ◽  
V. Zaporozhan ◽  
M. Panchenko ◽  
...  
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Experimental Studies ◽  
Operating Experience ◽  
Low Pressure ◽  
Main Task ◽  
Experimental Facility ◽  
Design Features ◽  
Technical Problems ◽  
Hydraulic Processes

Nowadays, the development of nuclear energy is determined by solving the set of scientific and technical problems that provides reliable, safe and sustainable work of the operated and designed NPPs. At the same time different accident conditions and likelihood (probability) of variant equipment operating failures are analyzed. Obtained operating experience of the mixing low-pressure heaters (LPH) at thermal power plants (TPP) and NPPs shows that pulsations occur in some operation regimes of LPH turbine which lead to inner element destructions of LPH and pipeline malfunctions. These circumstances negatively affect operation of equipment that locates after LPH in condensate-supply tract. Consequently, unit capacity factor and economic indicators descend since troubleshooting for LPH mechanisms require some time and material resources. This work presents the experimental facility design and description of main design features of the facility components. The stand was designed to study the processes that lead to the vibration appearance in mixing LPH in condensate-supply tract of K-1000-60/3000 turbines. The main task of scale modeling is the need to observe equivalent conditions of the thermal-hydraulic processes behavior in the model in relation to full-scale equipment. To solve this problem using ANSYS code a preliminary simulation of hydraulic processes occurring in the experimental facility was performed. This allowed to determine in advance certain design features in the design of given facility. The results of experimental studies of the developed facility should allow to develop measures for reduction or complete elimination of vibrations in mixing LPH, as well as to validate computer programs for design analysis of stationary and non-stationary thermal-hydraulic processes in the specified equipment and designed measures testing.

Computer-mediated communication (CMC) in L2 oral proficiency development: A meta-analysis

ReCALL ◽  
2014 ◽  
Vol 27 (3) ◽  
pp. 261-287 ◽  
Author(s):  
Huifen Lin
Keyword(s):  
Effect Size ◽  
Meta Analysis ◽  
Computer Mediated Communication ◽  
Large Body ◽  
Experimental Studies ◽  
Oral Proficiency ◽  
Task Type ◽  
Oral Performance ◽  
Mediated Communication ◽  
Computer Mediated

AbstractThe ever growing interest in the development of foreign or second (L2) oral proficiency in a computer-mediated communication (CMC) classroom has resulted in a large body of studies looking at both the direct and indirect effects of CMC interventions on the acquisition of oral competences. The present study employed a quantitative meta-analytic approach to investigate such effects by synthesizing (quasi)experimental studies that provide empirical quantitative data for effect size calculation. A literature search located 25 relevant studies for the final analysis. Each study was independently coded for learner, design and publication characteristics. The averaged effect size was estimated from the included studies. The results of the meta-analysis reveal that communication mediated by computer/technologies produced a moderate positive effect on L2 learners’ oral proficiency compared to face-to-face (F2F) communication or no interaction. Furthermore, CMC has roughly similar effect on pronunciation, lexical and syntactic level of oral production; however, it might have a negative impact on fluency and accuracy. This meta-analysis also found that the effect of CMC on oral proficiency depends on several methodological factors such as task type, outcome measurement, treatment length, and assessment task. Major findings of the current meta-analysis include: (1) studies relying on elicited data are superior to those utilizing naturalistic data; (2) reading aloud seems to be the task that could elicit the best oral performance from students; (3) surprisingly, CMC appeared to be harmful for accuracy and fluency; (4) studies that employed decision-making generated the largest effect size, followed by studies that used more than one task type; (5) among the four tasks, jigsaw actually generated a negative effect on oral performance; and (6) as the most popular task employed by primary researchers, opinion-exchange studies produced the smallest effect size. These findings need to be interpreted as exploratory rather than confirmatory since each of them became less trustworthy after taking into consideration numerous other factors such as CMC task and the particular CMC tool used, etc. Future research suggestions are provided and the limitations of this meta-analysis are addressed.

Effects of Task Complexity Variables on Complexity, Accuracy and Fluency of Second Language Production: A Critical Review

2017 ◽  
Vol 9 (4) ◽  
pp. 94
Author(s):  
Lilliati Ismail ◽  
Arshad Abd. Samad
Keyword(s):  
Second Language ◽  
Learning Process ◽  
Critical Review ◽  
Language Production ◽  
Task Complexity ◽  
Task Design ◽  
Complex Tasks ◽  
Complexity Level ◽  
Language Classroom ◽  
L2 Learners

This paper reviews recent research that has manipulated task complexity variables to gauge their effects on L2 learning. This review draws upon Robinson’s Triadic Componential Framework for task design (2001a) which suggests that increases in task complexity levels should be an important consideration when designing and sequencing a task-based language syllabus. Most of the studies discussed support Robinson’s contention that more complex tasks result in greater accuracy and complexity in L2 learners’ language production. This would imply the need to consider task complexity variables in selecting, designing and administering tasks in the second language classroom to achieve optimum effects on the learning process. Teachers would also have to be conscientious in evaluating cognitive loads of tasks to ensure heightened attention to meaning and forms. Also, the potential of using task complexity level as an organising principle for a second-language syllabus needs to be further explored and investigated.

Experimental Studies of a Ranque-Hilsch Vortex Tube

2013 ◽  
Vol 390 ◽  
pp. 670-674 ◽  
Author(s):  
Azizul Mohamad ◽  
Nasrul Amri Mohd Amin ◽  
Zuradzman Mohamad Razlan ◽  
Mohd Shukry Abdul Majid
Keyword(s):  
Vortex Tube ◽  
Experimental Studies ◽  
The Other ◽  
Maximum Temperature ◽  
Physical Parameters ◽  
Inlet Temperature ◽  
Heating Effect ◽  
Design Features ◽  
Air Mass ◽  
Very High

Vortex tube is a device that separates a compressed flow of gas into two streams simultaneously, one giving kinetic energy to the other, resulting one hotter than the inlet temperature and one lower, without having any moving part. This research focuses on investigating the effects of various physical parameters on the performance of the vortex tube, namely cold nozzle diameter, length of the tube, and air mass flow rate at the hot end of the tube. In general, there are two major design features associated with the vortex tube, namely (a) maximum temperature differentials in vortex tube to produce small amount of air with very low and very high temperatures, and (b) maximum cooling/heating effect by producing large quantity of air with moderate temperatures. By considering the experimental results, an optimized set of parameters that contribute to the most efficient vortex tube design would be proposed depending on the desired design features.

Sentence production in Parkinson disease: Effects of conceptual and task complexity

2011 ◽  
Vol 33 (2) ◽  
pp. 225-251 ◽  
Author(s):  
MICHELLE S. TROCHE ◽  
LORI J. P. ALTMANN
Keyword(s):  
Parkinson Disease ◽  
Cognitive Ability ◽  
Cognitive Abilities ◽  
Language Production ◽  
Task Complexity ◽  
Experimental Studies ◽  
Sentence Production ◽  
Generation Task ◽  
Sentence Generation ◽  
And Performance

ABSTRACTExperimental studies of sentence production in Parkinson disease (PD) are rare. This study examined the relationship between cognitive abilities and performance on two sentence production tasks, sentence repetition, and sentence generation, in which complexity was manipulated. Thirty-eight older adults aged 60 to 85, half with PD, completed the two language tasks plus a cognitive battery. Participants with PD performed more poorly in the repetition task overall, especially in fluency, but differences were no longer significant once cognitive ability was controlled. In contrast, on the sentence generation task the PD group was significantly impaired on all language dimensions and overall performance. Although cognitive ability accounted for significant variance in all measures of sentence generation, the PD group remained significantly impaired when these factors were controlled. These findings suggest that, although language production is influenced by cognitive abilities, it can be significantly impaired in PD over and above the effects of differences in cognitive abilities.

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