Replicability-Report for CHILD DEVELOPMENT

CHILD DEVELOPMENT is published by the Wiley. The journal started publishing articles in 1930.

SCImago ranks CHILD DEVELOPMENT as #22 of all psychology journals with an SJR-Impact-Factor of 3.1 in 2014. At present, the replicability-report is based on articles published from 2000 to 2015. During this time, CHILD PSYCHOLOGY published 1,986 articles. The replicability-report is based on 1,555 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 7,550 z-scores in the range from 2 (just above the 1.96 criterion value for p < .05 (two-tailed)) to 4.

PHP-Curve ChiDev

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 61% with the homogeneous model that is currently being used for the replicability rankings. The heterogeneous model fits the actual data better and produces an estimate of 55% power in this range.  Power for all significant results is estimated to be 69%.  A power estimate of 61% implies that 61% 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 ChiDevThe time trend shows a slight decline in power over time. The power estimates in the past three years are below the historic average. The average for the years 2010-2014 is 63%.  The declining trend shows that CHILD DEVELOPMENT has not responded to the replicability crisis in psychology.

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