More on ANOVA

Within-Subjects ANOVA

Trial, Dose, and Day. If different groups are used for each condition, then the variable is a between-subjects variable; if the same subjects are tested in each condition, then the variable is a within-subjects variable.
For between-subjects variables, differences among subjects are error. For within-subjects variables, each subject's performance in one condition is compared to his or her performance in another condition. Therefore, overall differences are not a source of error.
The assumption has to do with correlations among scores, which is not applicable in between-subjects designs since subjects have only one score.
Violating the assumption increases the Type I error rate, sometimes substantially.
0.049

Callback before_footer in local_aigrade component should be migrated to new hook callback for core\hook\output\before_footer_html_generation

line 7225 of /lib/moodlelib.php: call to debugging()
line 7292 of /lib/moodlelib.php: call to {closure}()
line 71 of /lib/classes/hook/output/before_footer_html_generation.php: call to get_plugins_with_function()
line 987 of /lib/classes/output/core_renderer.php: call to core\hook\output\before_footer_html_generation->process_legacy_callbacks()
line 97 of /mod/book/tool/print/index.php: call to core\output\core_renderer->footer()