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Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the responsive-lightbox domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /home3/moultron/public_html/jethrobelt/wp-includes/functions.php on line 6114 internal validity – Utah State University
Internal validity relates to the causal linkage between the independent (treatment) variable and the dependent (response or outcome) variable. An internally valid study is one which minimizes the threats to internal validity in order to confidently measure causation.
