easystats/performance: performance 0.15.0

Published July 10, 2025 | Version v0.15.0

Software Open

New functions

item_omega(), to calculate the McDonald's Omega reliability coefficient.
item_totalcor() calculates the total correlation of an item with the sum of all other items in a scale. If corrected = TRUE, the total correlation is corrected for the number of items in the scale (which is equivalent to item_discrimination()).
Column names of item_reliability() were changed to be in line with the easystats naming convention and to be consistent with the output of other related functions.

check_itemscale() now work with factor analysis results, from parameters::factor_analysis().
item_reliability() now includes the item-total correlation, and information about Cronbach's alpha and mean inter-item correlation in the printed output.
cronbachs_alpha() now work with factor analysis results, from parameters::factor_analysis().
Formatting of p-values in test_likelihoodratio() is now consistent with formatted p-values from other functions.
Added following methods for psych::fa(), psych::principal(), item_omega(), psych::omega(), and parameters::factor_analysis(): check_normality(), check_residuals(), check_outliers(), and model_performance().
item_alpha() was added as an alias for cronbachs_alpha().
Further functions get a display(), print_md() and print_html() method.

Fixed issue in check_predictions() for binomial models with a response defined as proportion or matrix of successes and trials.
print_md() for objects returned by check_itemscale() now include the footer with information about Cronbach's alpha and mean inter-item correlation.

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easystats/performance-v0.15.0.zip md5:cdfcaf1095968064cb51da61015e0390	4.5 MB	Preview Download

Is supplement to: Software: https://github.com/easystats/performance/tree/v0.15.0 (URL)