Otras opciones tras leer esta explicación:

"Front-of-mind vs. back-of-mind

The difference between front-of-mind attention and the back-of-mind version is very simple. Think about yourself driving down the street talking to a friend. Your front of mind attention is the topic of conversation. At the end of the drive you'll be able to think back on it and remember most parts of the dialogue.

You probably won't remember much of your back-of-mind attention -- but it was equally important. You probably did not run a single traffic light down the whole road. You paid complete and devoted attention to driving your vehicle, and to all the state and local traffic laws, and you don't even remember it".
www.attentionbook.com/atec06.asp
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Otra buena ayuda para entender la expresión es este artículo sobre unos cambios en una web:

FRONT OF MIND

"But the curious phenomenon I have noticed since removing the days and dates from the site is that there seems to be a temptation to assume that the top item on the page is either **THE MOST IMPORTANT ITEM ON THE PAGE or THE THING I´M THINKING ABOUT MOST AT THE MOMENT**. This may or may not necessarily be true".

www.meish.org/archives/20020814_front_of_mind.php
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Otro saludito.
:)