"personally observe" — Kollokationen-Wörterbuch Englisch

personally observe Kollokation
Automatische Übersetzung (wir garantieren seine Korrektheit nicht): osobiście zauważ
  1. observe Verb + personally Adverb
    Schwache Kollokation

    The test, while not observed personally by the author, seems to have been conducted with proper controls according to report.