Hello. You did not enter the text to which this question refers, which makes it impossible for it to be answered. However, I will try to help you in the best possible way.
Through the context of your question, we can consider that the author of the text to which the question refers, establishes the effects that mental games have on physics students, probably these are positive effects, but what matters is the fact that mental games have effects on students. In this case, we can consider that the author establishes a cause and effect connection to show the relationship between these two elements.