Qualitative PT data analysis with easy-to-interpret scores

Verfasser / Beitragende:
[Steffen Uhlig, Christian Bläul, Kirstin Frost, Susann Sgorzaly, Bertrand Colson, Kirsten Simon]
Ort, Verlag, Jahr:
2015
Enthalten in:
Accreditation and Quality Assurance, 20/5(2015-10-01), 347-353
Format:
Artikel (online)
ID: 605465975
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024 7 0 |a 10.1007/s00769-015-1174-8  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s00769-015-1174-8 
245 0 0 |a Qualitative PT data analysis with easy-to-interpret scores  |h [Elektronische Daten]  |c [Steffen Uhlig, Christian Bläul, Kirstin Frost, Susann Sgorzaly, Bertrand Colson, Kirsten Simon] 
520 3 |a Numerical values called L-scores, with properties similar to those of z-scores, can be calculated for proficiency tests involving qualitative test methods. These scores do not require the use of replicates and are defined in such a way as to reflect both the Level of Competence of the Laboratory (LCL) and the Level of Difficulty of the Task (LDT). On the basis of the "logit” statistical model, the parameters corresponding to the LCL and the LDT values are determined via maximum likelihood estimation. With p denoting the corrected binary response, the model can be interpreted as $$\ln \left( {p/\left( {1 - p} \right)} \right) = LCL - LDT.$$ ln p / 1 - p = L C L - L D T . The estimated parameters are then the quantities used to compute the L-scores for the participating laboratories. In the case of the laboratory-specific L-scores across tasks, the score for a particular laboratory can be computed as the deviation of the individual LCL from the average LCL relative to the standard error. The interpretation of the L-scores is slightly different from that of z-scores If |L|≤2, the competence of the participant is not significantly different from the average competence. If L>2, the competence is significantly higher, while if L<−2, the competence is significantly lower. 
540 |a Springer-Verlag Berlin Heidelberg, 2015 
690 7 |a Qualitative test method  |2 nationallicence 
690 7 |a Proficiency test (PT)  |2 nationallicence 
690 7 |a Binary data  |2 nationallicence 
690 7 |a Rate of detection ( ROD )  |2 nationallicence 
690 7 |a Probability of detection (POD)  |2 nationallicence 
690 7 |a z -score  |2 nationallicence 
690 7 |a L -score  |2 nationallicence 
690 7 |a Logit model  |2 nationallicence 
700 1 |a Uhlig  |D Steffen  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
700 1 |a Bläul  |D Christian  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
700 1 |a Frost  |D Kirstin  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
700 1 |a Sgorzaly  |D Susann  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
700 1 |a Colson  |D Bertrand  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
700 1 |a Simon  |D Kirsten  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
773 0 |t Accreditation and Quality Assurance  |d Springer Berlin Heidelberg  |g 20/5(2015-10-01), 347-353  |x 0949-1775  |q 20:5<347  |1 2015  |2 20  |o 769 
856 4 0 |u https://doi.org/10.1007/s00769-015-1174-8  |q text/html  |z Onlinezugriff via DOI 
898 |a BK010053  |b XK010053  |c XK010000 
900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s00769-015-1174-8  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Uhlig  |D Steffen  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Bläul  |D Christian  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Frost  |D Kirstin  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Sgorzaly  |D Susann  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Colson  |D Bertrand  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Simon  |D Kirsten  |u QuoData GmbH, Prellerstr. 14, 01309, Dresden, Germany  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Accreditation and Quality Assurance  |d Springer Berlin Heidelberg  |g 20/5(2015-10-01), 347-353  |x 0949-1775  |q 20:5<347  |1 2015  |2 20  |o 769