Fig 1.
Number of yearly released research articles by journal and year.
Table 1.
Change in study characteristics in research articles with statistical results before and after 2015.
Fig 2.
Number of articles with p-values and distribution of number of extracted p-values per study by journal.
Table 2.
Journal specific properties of extracted raw, computable and checkable p-values within articles that contain any statistical result.
Table 3.
Proportion of articles that report standard effect sizes in studies with t-test, ANOVA and regression analysis.
Fig 3.
Distribution of maximum α levels extracted over 30 times.
Table 4.
Relative frequency of extracted maximum α levels < .05 in articles with p-values.
Table 5.
Relative frequency of confidence interval use in articles with p-values.
Table 6.
Relative frequency of power values or mentions of power analysis by journal and year in articles with p-values.
Table 7.
Absolute (h(x)) and relative (f(x)) frequency distribution of the first detected and categorized power value per article.
Table 8.
Relative frequency of application of Bayesian inferential statistics by journal and year.
Table 9.
Absolute frequency of preregistered or registered reports by journal and year.
Table 10.
Relative frequency of at least one detected multiple test correction procedure by journal and year in articles with p-values.
Fig 4.
Absolute frequencies of articles with correction procedures by categorized number of p-values (numbers on top) and journal-wise relation of number of extracted p-values from text and use of correction procedures for multiple testing (bars).
Table 11.
Relative frequencies of detected test direction by journal.
Table 12.
Median and .75-quantile of estimated sample size before and in 2015 and after 2015 by journal.
Table 13.
Median estimated sample size by journal and year.
Table 14.
Median estimated sample sizes in articles with and without repeated measures analysis and proportion of articles with repeated measures design.
Fig 5.
Change in relative country involvement before and after 2015.
Fig 6.
Change in WEIRD and non-WEIRD country of origin over time.