The telephone survey was conducted for Ambius among a random sample of 426 U.S. adults employed full-time between April 11 and April 14.

• 这电话访问的研究对象，是由安比斯公司从四百廿六名美国成年全职员工中随机抽样而来，研究进行时间是从四月十一日到十四日。