Complex sentence: It occurs when a participant always chooses to deny or not endorse any statements in a survey or measure, and has the same effect of invalidating any kinds of endorsements that participants may make over the course of the experiment.
Split into simpler sentences: It occurs when a participant always chooses to deny or not endorse any statements in a survey or measure. This has a similar effect of invalidating any kinds of endorsements that participants may make over the course of the experiment.