Complex sentence: They surmised that experienced viewers would comprehend and interact more with the recurring and familiar segments of the show designed to aid comprehension, but found that familiarity with the structure of an individual episode did not provide experienced viewers with an advantage over the inexperienced viewers.
Split into simpler sentences: They surmised that experienced viewers would comprehend and interact more with the recurring and familiar segments of the show designed to aid comprehension. They found that familiarity with the structure of an individual episode did not provide experienced viewers with an advantage over the inexperienced viewers.