This is the 13360th most frequent German word.
beeinflusst
"Beeinflusst" means "influenced."
The verb 'beeinflusst' is used in its third person singular form to indicate how the weather has an effect on the subject's mood.
Das Wetter beeinflusst meine Stimmung jeden Tag.
The weather influences my mood every day.
In this sentence, 'beeinflusst worden' is used in the passive voice, perfect tense, to question whether external factors affected the results of the study.
Sind die Ergebnisse der Studie durch äußere Faktoren beeinflusst worden?
Have the results of the study been influenced by external factors?
Here, 'beeinflusst' appears in its past participle form, combined with 'haben' to form the perfect tense, indicating that the influencing action was not performed in the past.