How can you guys not bring up split infinitives? The infinitive of a verb is the "to" version: to eat, to sleep, etc.
in romance languages, the infinitive is one word: manger, dormir, etc.
We sometimes pretend we speak latin in our language, so grammar nazis can get on us about not splitting infinitives, since you can't do it in Latin.
Hence, when you say "to effectively research" you've split the infinitive, which is wrong.
However, there are lots of time when not splitting the infinitive will cahnge the meaning of your sentence.
I'm a rebel. I split them consciously and with glee.