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Judgmental overconfidence and trading activity

Gerlinde Fellner-Röhling, Sebastian Krügel
2014 Journal of Economic Behavior and Organization  
Standard-Nutzungsbedingungen: Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden. Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen. Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen
more » ... bedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Abstract We investigate the theoretically proposed link between judgmental overconfidence and trading activity. In addition to applying classical measures of miscalibration, we introduce a measure to capture misperception of signal reliability, which is the relevant bias in the theoretical overconfidence literature. We relate the obtained overconfidence measures to trading activity in call and continuous experimental asset markets. Our results confirm prior findings that classical miscalibration measures are not related to trading activity. However, misperception of signal reliability is significantly linked to trading volume, particularly in the continuous market. In addition, we find that men trade more than women at high levels of risk aversion, but the gender trading gap vanishes as risk aversion lessens. The reason is that the trading activity of women seems to be more sensitive to risk attitudes than that of men.
doi:10.1016/j.jebo.2014.04.016 fatcat:67dr235ow5h2njepvc333ysx44

Relevant Conditions for Teachers' Use of Student Feedback [chapter]

Sebastian Röhl, Holger Gärtner
2021 Student Feedback on Teaching in Schools  
., 2005a; Kahmann & Mulder, 2011; Introduction to this volume by Röhl et al.) .  ...  the information on the variance of student perceptions as well as the individual item scores contain relevant information about one's own teaching (see Chap. 6 by Schweig and Martínez and Chap. 3 by Röhl  ...  Sebastian Röhl has been an Academic Assistant in the Department of Educational Science at the University of Education Freiburg and is currently a Postdoctoral Researcher in the Institute of Education at  ... 
doi:10.1007/978-3-030-75150-0_10 fatcat:ibup5sbhbfbrtcirassbeophoq

Student Perceptions of Teaching Quality: Dimensionality and Halo Effects [chapter]

Sebastian Röhl, Wolfram Rollett
2021 Student Feedback on Teaching in Schools  
Measures Feedback Questionnaire on Teaching Quality (FQTQ) The Feedback Questionnaire on Teaching Quality (FQTQ, Röhl, 2015) is based on the characteristics of good teaching according to Meyer (2005  ...  Table 1 1 Measurement instruments Scale Number of items Example Reliability ω a Feedback Questionnaire on Teaching Quality (FQTQ, Röhl, 2015) Clarity of content and 6 I understand what I am .87 explanations  ...  Sebastian Röhl has been an Academic Assistant in the Department of Educational Science at the University of Education Freiburg and is currently a Postdoctoral Researcher in the Institute of Education at  ... 
doi:10.1007/978-3-030-75150-0_3 fatcat:g7zkpxzxtzfwrofmsxtra2ouem

Context-aware Augmented Reality in laparoscopic surgery

Darko Katić, Anna-Laura Wekerle, Jochen Görtler, Patrick Spengler, Sebastian Bodenstedt, Sebastian Röhl, Stefan Suwelack, Hannes Götz Kenngott, Martin Wagner, Beat Peter Müller-Stich, Rüdiger Dillmann, Stefanie Speidel
2013 Computerized Medical Imaging and Graphics  
Augmented Reality is a promising paradigm for intraoperative assistance. Yet, apart from technical issues, a major obstacle to its clinical application is the man-machine interaction. Visualization of unnecessary, obsolete or redundant information may cause confusion and distraction, reducing usefulness and acceptance of the assistance system. We propose a system capable of automatically filtering available information based on recognized phases in the operating room. Our system offers a
more » ... c selection of available visualizations which suit the surgeon's needs best. The system was implemented for use in laparoscopic liver and gallbladder surgery and evaluated in phantom experiments in conjunction with expert interviews.
doi:10.1016/j.compmedimag.2013.03.003 pmid:23541864 fatcat:gka6krumpfbpvlugqqsli6eel4

Effects of Student Feedback on Teaching and Classes: An Overview and Meta-Analysis of Intervention Studies [chapter]

Sebastian Röhl
2021 Student Feedback on Teaching in Schools  
Furthermore, teachers' productive use of student feedback depends on various individual and situational characteristics, and this is described by Röhl and Gärtner in Chap. 10 and in the Introduction of  ...  the implementation of student feedback in schools, there is a need to consider organizational characteristics which are beneficial for constructively dealing with feedback, as presented in Chap. 10 by Röhl  ... 
doi:10.1007/978-3-030-75150-0_9 fatcat:gzzk4ujqifffvfrpyvrjdnzljq

Instrumental Assessment of Stepping in Place Captures Clinically Relevant Motor Symptoms of Parkinson's Disease

Karen Otte, Tobias Ellermeyer, Tim-Sebastian Vater, Marlen Voigt, Daniel Kroneberg, Ludwig Rasche, Theresa Krüger, Hanna Maria Röhling, Bastian Kayser, Sebastian Mansow-Model, Fabian Klostermann, Alexander Ulrich Brandt (+3 others)
2020 Sensors  
Fluctuations of motor symptoms make clinical assessment in Parkinson's disease a complex task. New technologies aim to quantify motor symptoms, and their remote application holds potential for a closer monitoring of treatment effects. The focus of this study was to explore the potential of a stepping in place task using RGB-Depth (RGBD) camera technology to assess motor symptoms of people with Parkinson's disease. In total, 25 persons performed a 40 s stepping in place task in front of a single
more » ... RGBD camera (Kinect for Xbox One) in up to two different therapeutic states. Eight kinematic parameters were derived from knee movements to describe features of hypokinesia, asymmetry, and arrhythmicity of stepping. To explore their potential clinical utility, these parameters were analyzed for their Spearman's Rho rank correlation to clinical ratings, and for intraindividual changes between treatment conditions using standard response mean and paired t-test. Test performance not only differed between ON and OFF treatment conditions, but showed moderate correlations to clinical ratings, specifically ratings of postural instability (pull test). Furthermore, the test elicited freezing in some subjects. Results suggest that this single standardized motor task is a promising candidate to assess an array of relevant motor symptoms of Parkinson's disease. The simple technical test setup would allow future use by patients themselves.
doi:10.3390/s20195465 pmid:32977647 pmcid:PMC7582555 fatcat:46dfzygxind57oi6fucx64td7i

Mono- and Tri-Functionalization of Trimethylresorcin[4]arenes

Dirk Loose, Alexandra Aniol, Martin Feigel, Sebastian Röhling, Gerald Dyker
2019 European Journal of Organic Chemistry  
Short and efficient syntheses of mono-and tris-functionalized resorcin[4]arenes were developed. The co-condensation of resorcinol and 2-methylresorcinol was optimized, targeting for the trimethylresorcin[4]arene, easy to isolate. Complementary regiospecific conditions for the mono-and tris-halo-Universitätsstraße 150,
doi:10.1002/ejoc.201901564 fatcat:dokyr4eexrfglat6ngfcnb5vpq

The Process Model of Student Feedback on Teaching (SFT): A Theoretical Framework and Introductory Remarks [chapter]

Sebastian Röhl, Hannah Bijlsma, Wolfram Rollett
2021 Student Feedback on Teaching in Schools  
In Chap. 3, Röhl and Rollett -in line with the Process Model of Student Feedback on Teaching (SFT)-discuss theoretically assumed teaching quality dimensions, which can be distinguished in student feedback  ...  effects, improvement-oriented actions can take place, such as adaptive teaching to the different needs of students in the class (Gaertner, 2014) , increased attention to specific aspects during teaching (Röhl  ...  Sebastian Röhl has been an Academic Assistant in the Department of Educational Science at the University of Education Freiburg and is currently a Postdoctoral Researcher in the Institute of Education at  ... 
doi:10.1007/978-3-030-75150-0_1 fatcat:i3r7q3gobngz5nyrminkfunaxy

Using New Camera-Based Technologies for Gait Analysis in Older Adults in Comparison to the Established GAITRite System

Anika Steinert, Igor Sattler, Karen Otte, Hanna Röhling, Sebastian Mansow-Model, Ursula Müller-Werdan
2019 Sensors  
Sebastian Mansow-Model is a shareholder of Motognosis and named as inventor on patent applications describing perceptive visual computing for tracking of motor dysfunction.  ...  Conflicts of Interest: The authors Anika Steinert, Igor Sattler, Hanna Röhling and Ursula Müller-Werdan declare that they have no financial or personal relationship that influence (bias) their work.  ... 
doi:10.3390/s20010125 pmid:31878177 pmcid:PMC6983253 fatcat:3v6yz2ltanfcxkvbd4nirxqcke

High-Tone External Muscle Stimulation for the Treatment of Chronic Sciatica – A Randomized Controlled Crossover Trial

Kerstin Kempf, Martin Röhling, Eslam Darwish, Stephan Martin, Sebastian Jander, Jörg Herdmann, Susanne Stehr-Zirngibl
2018 The Open Pain Journal  
Chronic sciatica is a common pathology with a lifetime prevalence of 84%. Current therapy options are inadequate or not longlasting. Objectives: Evaluation of short-term application of High-Tone Electrical Muscle Stimulation (HTEMS) compared to Transcutaneous Electrical Nerve Stimulation (TENS) with chronic sciatica. Methods: Patients (n=100, (mean±SD) age=57±14 years, sex=42% male) with chronic sciatica were randomly assigned into two groups treated with either HTEMS or TENS. Each treatment
more » ... administered for a period of 45 min per day, 5 times within 7 days, with a 7-day wash-out period before crossover. A 5-day average of sciatic pain was assessed using the visual analog scale (VAS) before and after intervention. Drug administration was stable during the study. Results: Before crossover, pain intensity was significantly reduced by the HTEMS treatment (56±21 (60 [50-70]) to 45±21 (50 [30-60]) mm VAS; p<0.001), while no improvement occurred with TENS (59±19 (60 [50-70]) to 56±19 (60 [45-79]) mm VAS). After crossover, significant pain reduction was observed in both groups (both p <0.01) and did not differ between both groups after the whole intervention. Conclusion: HTEMS showed a higher potential for short-term reduction of pain than TENS and might offer new a therapeutic strategy for the treatment of chronic sciatica.
doi:10.2174/1876386301811010021 fatcat:tnnfholi4jbjpecjxjoeighgum

Camera-based objective measures of Parkinson's disease gait features

Jannis van Kersbergen, Karen Otte, Nienke M de Vries, Bastiaan R Bloem, Hanna M Röhling, Sebastian Mansow-Model, Nicolien M van der Kolk, Sebastiaan Overeem, Svitlana Zinger, Merel M van Gilst
2021 BMC Research Notes  
Parkinson's disease is a common, age-related, neurodegenerative disease, affecting gait and other motor functions. Technological developments in consumer imaging are starting to provide high-quality, affordable tools for home-based diagnosis and monitoring. This pilot study aims to investigate whether a consumer depth camera can capture changes in gait features of Parkinson's patients. The dataset consisted of 19 patients (tested in both a practically defined OFF phase and ON phase) and 8
more » ... ls, who performed the "Timed-Up-and-Go" test multiple times while being recorded with the Microsoft Kinect V2 sensor. Camera-derived features were step length, average walking speed and mediolateral sway. Motor signs were assessed clinically using the Movement Disorder Society Unified Parkinson's Disease Rating Scale. We found significant group differences between patients and controls for step length and average walking speed, showing the ability to detect Parkinson's features. However, there were no differences between the ON and OFF medication state, so further developments are needed to allow for detection of small intra-individual changes in symptom severity.
doi:10.1186/s13104-021-05744-z pmid:34446098 pmcid:PMC8393451 fatcat:4r47rzp2crgafnwvqr2k6t6qoy

The architecture of functional modules in the Hsp90 co-chaperone Sti1/Hop

Andreas B Schmid, Stephan Lagleder, Melissa Ann Gräwert, Alina Röhl, Franz Hagn, Sebastian K Wandinger, Marc B Cox, Oliver Demmer, Klaus Richter, Michael Groll, Horst Kessler, Johannes Buchner
2012 EMBO Journal  
Sti1/Hop is a modular protein required for the transfer of client proteins from the Hsp70 to the Hsp90 chaperone system in eukaryotes. It binds Hsp70 and Hsp90 simultaneously via TPR (tetratricopeptide repeat) domains. Sti1/Hop contains three TPR domains (TPR1, TPR2A and TPR2B) and two domains of unknown structure (DP1 and DP2). We show that TPR2A is the high affinity Hsp90binding site and TPR1 and TPR2B bind Hsp70 with moderate affinity. The DP domains exhibit highly homologous a-helical folds
more » ... as determined by NMR. These, and especially DP2, are important for client activation in vivo. The core module of Sti1 for Hsp90 inhibition is the TPR2A-TPR2B segment. In the crystal structure, the two TPR domains are connected via a rigid linker orienting their peptide-binding sites in opposite directions and allowing the simultaneous binding of TPR2A to the Hsp90 C-terminal domain and of TPR2B to Hsp70. Both domains also interact with the Hsp90 middle domain. The accessory TPR1-DP1 module may serve as an Hsp70-client delivery system for the TPR2A-TPR2B-DP2 segment, which is required for client activation in vivo.
doi:10.1038/emboj.2011.472 pmid:22227520 pmcid:PMC3321170 fatcat:5ixk4k2ms5f4ribaywokr5faeu

Cultural bias in motor function patterns: Potential relevance for predictive, preventive, and personalized medicine

Karen Otte, Tobias Ellermeyer, Masahide Suzuki, Hanna M. Röhling, Ryota Kuroiwa, Graham Cooper, Sebastian Mansow-Model, Masahiro Mori, Hanna Zimmermann, Alexander U. Brandt, Friedemann Paul, Shigeki Hirano (+2 others)
2021 The EPMA Journal  
Background Quantification of motor performance has a promising role in personalized medicine by diagnosing and monitoring, e.g. neurodegenerative diseases or health problems related to aging. New motion assessment technologies can evolve into patient-centered eHealth applications on a global scale to support personalized healthcare as well as treatment of disease. However, uncertainty remains on the limits of generalizability of such data, which is relevant specifically for preventive or
more » ... ive applications, using normative datasets to screen for incipient disease manifestations or indicators of individual risks. Objective This study explored differences between healthy German and Japanese adults in the performance of a short set of six motor tests. Methods Six motor tasks related to gait and balance were recorded with a validated 3D camera system. Twenty-five healthy adults from Chiba, Japan, participated in this study and were matched for age, sex, and BMI to a sample of 25 healthy adults from Berlin, Germany. Recordings used the same technical setup and standard instructions and were supervised by the same experienced operator. Differences in motor performance were analyzed using multiple linear regressions models, adjusted for differences in body stature. Results From 23 presented parameters, five showed group-related differences after adjustment for height and weight (R2 between .19 and .46, p<.05). Japanese adults transitioned faster between sitting and standing and used a smaller range of hand motion. In stepping-in-place, cadence was similar in both groups, but Japanese adults showed higher knee movement amplitudes. Body height was identified as relevant confounder (standardized beta >.5) for performance of short comfortable and maximum speed walks. For results of posturography, regression models did not reveal effects of group or body stature. Conclusions Our results support the existence of a population-specific bias in motor function patterns in young healthy adults. This needs to be considered when motor function is assessed and used for clinical decisions, especially for personalized predictive and preventive medical purposes. The bias affected only the performance of specific items and parameters and is not fully explained by population-specific ethnic differences in body stature. It may be partially explained as cultural bias related to motor habits. Observed effects were small but are expected to be larger in a non-controlled cross-cultural application of motion assessment technologies with relevance for related algorithms that are being developed and used for data processing. In sum, the interpretation of individual data should be related to appropriate population-specific or even better personalized normative values to yield its full potential and avoid misinterpretation.
doi:10.1007/s13167-021-00236-3 pmid:33782636 pmcid:PMC7954970 fatcat:g3koblfguna5xhua6au6nsnapy

The immunopeptidomic landscape of ovarian carcinomas

Heiko Schuster, Janet K. Peper, Hans-Christian Bösmüller, Kevin Röhle, Linus Backert, Tatjana Bilich, Britta Ney, Markus W. Löffler, Daniel J. Kowalewski, Nico Trautwein, Armin Rabsteyn, Tobias Engler (+12 others)
2017 Proceedings of the National Academy of Sciences of the United States of America  
Conflict of interest statement: H.-G.R. is a shareholder of Immatics Biotechnologies, Tübingen, and CureVac GmbH, Tübingen. H.S. and D.J.K. are employees of Immatics Biotechnologies GmbH. The authors declare that Immatics did not provide neither financial nor scientific support in any direct relation to this manuscript or the underlying studies, and was not involved in data collection, analysis, or decision to publish.
doi:10.1073/pnas.1707658114 pmid:29093164 pmcid:PMC5699044 fatcat:vellz5zekna7zcjl6pxloimjny

Intraoperative Modellierung und Registrierung für ein laparoskopisches Assistenzsystem

Sebastian Röhl
Ein großes Dankeschön gebührt auch Sebastian B., der insbesondere meine Arbeit zuerst als Hiwi, dann als Studienarbeit und letztendlich als Kollege vor allem softwaretechnisch sehr unterstützt hat.  ...  Daneben möchte ich Yoo-Jin und Michael für die tollen Klausurtagungsziele und die schönen, wenn auch zu seltenen Gesprächen in der Küche danken sowie Sebastian S., bei dessen Diplomarbeit auch erste Erfahrungen  ... 
doi:10.5445/ksp/1000036443 fatcat:palh6vkmn5ft7kl47kgdmddyei
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