872 research outputs found
A replication of four quasi-experiments and three facts from 'The effect of file sharing on record sales: an empirical analysis' (Journal of Political Economy, 2007)
No full textThe influential piracy paper by Professors Oberholzer-Gee and Strumpf, although mainly based on proprietary data, contained an 'important complement' to the main results, consisting of four "quasi-experiments" using publicly available data. This replication examines all of these quasi-experiments, first, by narrowly using identical data and statistical methods, as well as in a broader sense by extending or augmenting the data or methods. This study concludes that none of the four quasi-experiments provide evidence in support of OS' hypothesis that file-sharing has not harmed record sales
Psychometric properties of the Liebowitz Social Anxiety Scale
No full textThe present study provides data on the reliability, validity and treatment sensitivity of the Liebowitz Social Anxiety Scale (LSAS), one of the most commonly used clinician-administered scales for the assessment of social phobia.
Three hundred and eighty-two patients from several studies of the treatment of social phobia were evaluated. An independent assessor administered the LSAS to each patient prior to the initiation of treatment. Patients also completed other measures of social anxiety and avoidance, although the specific measures varied across samples.
The LSAS and its subscales were normally distributed and demonstrated excellent internal consistency. The convergent validity of the LSAS was demonstrated via significant correlations with other commonly-used measures of social anxiety and avoidance. These correlations also tended to be larger than correlations with measures of depression, especially after treatment. However, the pattern of correlations of LSAS subscales with one another and with the other measures suggest that the fear subscales and the avoidance subscales may not be sufficiently distinct in clinical samples. The LSAS was also demonstrated to be sensitive to the effects of pharmacological treatments of social phobia over time and in comparison to double-blind pill placebo.
The LSAS appears to be a reliable, valid and treatment sensitive measure of social phobia. Further study of the LSAS, both in samples with severe social phobia and in community samples, is needed
Knowledge and Collaboration in Multihub Networks: Orchestration Processes among Clinical Commissioning Groups (CCGs) in the United Kingdom
No full textMiani C, Zachariadis M, Oborn E, Barrett M. Knowledge and Collaboration in Multihub Networks: Orchestration Processes among Clinical Commissioning Groups (CCGs) in the United Kingdom. In: Liebowitz J, ed. Knowledge management handbook : collaboration and social networking. 2nd ed. Boca Raton, Fla.: CRC Press; 2012: 11-28
The Liebowitz social anxiety scale as a self-report instrument: a preliminary psychometric analysis
No full textBaker SL, Heinrichs N, Kim H-J, Hofmann SG. The Liebowitz social anxiety scale as a self-report instrument: a preliminary psychometric analysis. Behaviour Research and Therapy. 2002;40(6):701-715.The Liebowitz social anxiety scale (LSAS) is a commonly used clinician-administered instrument. The present study reports on the properties of a self-report version of the LSAS (LSAS-SR). About 175 participants diagnosed with social phobia participated in the study. The LSAS-SR showed overall good psychometric properties as indicated by the results of test–retest reliability, internal consistency, and convergent and discriminant validity. Furthermore, the scale was sensitive to treatment change. The construct validity of the LSAS-SR, however, remains to be further explored. These findings support the utility of the LSAS-SR, which has the advantage of saving valuable clinician time compared to the clinician-administered version
The Oberholzer-Gee/Strumpf File-Sharing Instrument Fails the Laugh Test
No full textI examine the key instrument (German kids on vacation) used by Professors Oberholzer-Gee and Strumpf. Their measured relationship between the instrument and the variable that it is instrumenting for, American downloading, is seen to have outlandish implications, indicating an important error. The instrument is also shown to be related to American record sales, contrary to the requirements of their analysis. The data set used by O/S is biased, considerably overstating the share of German files. Finally, I demonstrate that the instrument must have a de minimus impact on American downloading (and thus American record sales) negating its potential usefulness and implying that their approach could never have worked.
Author Co-Citation Analysis (ACA): a powerful tool for representing implicit knowledge of scholar knowledge workers
No full textIn the last decade, knowledge has emerged as one of the most important and valuable organizational assets. Gradually this importance caused to emergence of new discipline entitled ―knowledge management‖. However one of the major challenges of knowledge management is conversion implicit or tacit knowledge to explicit knowledge. Thus Making knowledge visible so that it can be better accessed, discussed, valued or generally managed is a long-standing objective in knowledge management. Accordingly in this paper author co- citation analysis (ACA) will be proposed as an efficient technique of knowledge visualization in academia (Scholar knowledge workers)
Moral erosion: how can medical professionals safeguard against the slippery slope?
No full textThe extensive participation of German physicians in the atrocities of the Holocaust raises many questions concerning the potential for moral erosion in medicine. What circumstances and methods of rationalisation allowed doctors to turn from healers into accomplices of genocide? Are physicians still vulnerable to corruption of their guiding principles and, if so, what can be done to prevent this process from occurring? With these thoughts in mind, the author reflects on his experiences participating in the Fellowships at Auschwitz for the Study of Professional Ethics program and offers a medical student's perspective on the ethical issues encountered in clinical training and the practice of medicine
Scatterplot showing the significant negative correlation between scanpath length in degree of visual angle and score on the Liebowitz Social Anxiety Scale.
No full textScatterplot showing the significant negative correlation between scanpath length in degree of visual angle and score on the Liebowitz Social Anxiety Scale.</p
- …
