To find proof as to whether he is "in love" or not, Yukimura pats Himuro on the head from point-blank range. Seeing this, Ibarada, an upperclassman in the Ikeda Lab, talks about the need for a control experiment. In other words, in order to prove that the racing of his heart is because of Himuro specifically and not just because he's facing a woman, Yukimura has to pat Kanade and Ibarada on the head too. Himuro, on the other hand, sets out to prove that food made with love tastes better and cooks, but...
It was mental preparation to ensure that 
conditions were as close to normal as possible!
كان ذلك تدريبًا ذهنيّا لأحرص على كون 
!الشروط طبيعيّة بما يكفي
Das war mentale Vorbereitung zur Schaffung
einer normierten Ausgangslage.
¡Me preparaba mentalmente para
que las condiciones fueran normales!
Me preparaba mentalmente para
que las condiciones fueran normales.
J’essayais de me rapprocher au mieux
des conditions normales !
Mi stavo preparando mentalmente di modo
da essere in una condizione il più possibile normale!
Era preparação mental para que as
condições do experimento sejam neutras!
Это была моральная подготовка 
для создания оптимальных условий!