The study included healthy, educated adults who took standard tests of memory, reasoning and perception at the outset and at some point over the next seven years.
出自-2016年6月閱讀原文
英語六級真題
Concerns about open science should be discussed at the outset of a study.
2017年12月六級真題（第二套）閱讀 Section B
柯林斯高階英漢雙解學習詞典釋義
PHRASE
在開始時/ 從一開始
If something happens at the outset of an event, process, or period of time, it happens at the beginning of it. If something happens from the outset it happens from the beginning and continues to happen.