TY  - JOUR
A1  - Kliegl, Reinhold
A1  - Bates, Douglas
T1  - International collaboration in psychology is on the rise
N2  - There has been a substantial increase in the percentage for publications with co-authors located in departments from different countries in 12 major journals of psychology. The results are evidence for a remarkable internationalization of psychological research, starting in the mid 1970s and increasing in rate at the beginning of the 1990s. This growth occurs against a constant number of articles with authors from the same country; it is not due to a concomitant increase in the number of co-authors per article. Thus, international collaboration in psychology is obviously on the rise.
Y1  - 2011
UR  - http://www.springerlink.com/content/g5987481374222u7/fulltext.pdf
U6  - https://doi.org/10.1007/s11192-010-0299-0
ER  - 
TY  - JOUR
A1  - Kliegl, Reinhold
A1  - Bates, Douglas
T1  - International collaboration in psychology is on the rise
JF  - Scientometrics : an international journal for all quantitative aspects of the science of science, communication in science and science policy
N2  - There has been a substantial increase in the percentage for publications with co-authors located in departments from different countries in 12 major journals of psychology. The results are evidence for a remarkable internationalization of psychological research, starting in the mid 1970s and increasing in rate at the beginning of the 1990s. This growth occurs against a constant number of articles with authors from the same country; it is not due to a concomitant increase in the number of co-authors per article. Thus, international collaboration in psychology is obviously on the rise.
KW  - International collaboration
KW  - Psychological publications
KW  - Linear mixed model
KW  - Historical trend
Y1  - 2011
U6  - https://doi.org/10.1007/s11192-010-0299-0
SN  - 0138-9130
VL  - 87
IS  - 1
SP  - 149
EP  - 158
PB  - Springer
CY  - Dordrecht
ER  - 
TY  - JOUR
A1  - Matuschek, Hannes
A1  - Kliegl, Reinhold
A1  - Vasishth, Shravan
A1  - Baayen, Harald R.
A1  - Bates, Douglas
T1  - Balancing Type I error and power in linear mixed models
JF  - Journal of memory and language
N2  - Linear mixed-effects models have increasingly replaced mixed-model analyses of variance for statistical inference in factorial psycholinguistic experiments. Although LMMs have many advantages over ANOVA, like ANOVAs, setting them up for data analysis also requires some care. One simple option, when numerically possible, is to fit the full variance covariance structure of random effects (the maximal model; Barr, Levy, Scheepers & Tily, 2013), presumably to keep Type I error down to the nominal a in the presence of random effects. Although it is true that fitting a model with only random intercepts may lead to higher Type I error, fitting a maximal model also has a cost: it can lead to a significant loss of power. We demonstrate this with simulations and suggest that for typical psychological and psycholinguistic data, higher power is achieved without inflating Type I error rate if a model selection criterion is used to select a random effect structure that is supported by the data. (C) 2017 The Authors. Published by Elsevier Inc.
KW  - Power
KW  - Linear mixed effect model
KW  - Hypothesis testing
Y1  - 2017
U6  - https://doi.org/10.1016/j.jml.2017.01.001
SN  - 0749-596X
SN  - 1096-0821
VL  - 94
SP  - 305
EP  - 315
PB  - Elsevier
CY  - San Diego
ER  - 
TY  - JOUR
A1  - Baayen, Harald R.
A1  - Vasishth, Shravan
A1  - Kliegl, Reinhold
A1  - Bates, Douglas
T1  - The cave of shadows: Addressing the human factor with generalized additive mixed models
JF  - Journal of memory and language
KW  - Generalized additive mixed models
KW  - Within-experiment adaptation
KW  - Autocorrelation
KW  - Experimental time series
KW  - Confirmatory versus exploratory data analysis
KW  - Model selection
Y1  - 2017
U6  - https://doi.org/10.1016/j.jml.2016.11.006
SN  - 0749-596X
SN  - 1096-0821
VL  - 94
SP  - 206
EP  - 234
PB  - Elsevier
CY  - San Diego
ER  - 
TY  - GEN
A1  - Kliegl, Reinhold
A1  - Bates, Douglas
T1  - International Collaboration in Psychology is on the Rise
N2  - There has been a substantial increase in the percentage for publications with co-authors located in departments from different countries in 12 major journals of psychology. The results are evidence for a remarkable internationalization of psychological research, starting in the mid 1970s and increasing in rate at the beginning of the 1990s. This growth occurs against a constant number of articles with authors from the same country; it is not due to a concomitant increase in the number of co-authors per article. Thus, international collaboration in psychology is obviously on the rise.
T3  - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - paper 244 
Y1  - 2011
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-57045
ER  -