During the 1960s through the 1980s job prestige was calculated in a variety of different ways. People were given index cards with about 100 or so jobs listed on them and had to rank them from most to least prestigious. This ranking system was known as placing jobs in a "ladder of social standing." Another method they used in this time period was to have the respondents rank jobs on a "horizontal ruler" using specific guidelines such as estimated income, freedom of choice, and how interesting the job was. No matter what the method the outcomes were generally the same.