Replicability-Report for COGNITIVE PSYCHOLOGY

Cognitive Psychology is published by Elsevier. The journal started publishing articles in 1970.

SCImago ranks Cognitive Psychology as #26 of all psychology journals with an SJR-Impact-Factor of 2.9 in 2014. At present, the replicability-report is based on articles published from inception in 1970 to 2015. During this time, Cognitive Psychology published 919 articles. The replicability-report is based on 423 articles that reported one or more t or F-test in the text of the results section (results reported in Figures or Tables are not included).  The test-statistic was converted into z-scores to estimate post-hoc-power.  The analysis is based on 3,076 z-scores in the range from 2, just above the 1.96 criterion value for p < .05 (two-tailed), to 4.

PHP-Curve Cognitive Psychology

Based on the distribution of z-scores in the range between 2 and 4, the average power for significant results in this range is estimated to be 70%. This estimate suggests that 70% of the published significant results in this range are predicted to produce a significant results in an exact replication study with the same sample size and power (results with z > 4 are expected to replicate with nearly 100%).

The same method was used to estimate power for individual years.

PHP-Trend Cognitive Psychology

The results show an increase over time. In the past 10 years, replicability scores have been above the historic average. The replicability score in 2015 was 74%, which is one of the highest scores among psychology journals.  The 2015 score can still change as more data are becoming available.

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