Apsychologist would most likely use the term to refer to the common experience of "spacing out" momentarily.

The answer is Spacing effect. Spacing out your studying= beneficial to results. The more spaced out the studying the better retained the info will be. Also it is more likely to be remembered long term. This is also called a distributed practice.

imagine me knowing the answer

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.