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Charles King and John Summer introduced a scale in 1970, composed of seven items, five of which offer binary choices and two of which offer three possible responses. In 1986, Terry Childers presented a revised version of this scale, also comprising seven items adapted to various product categories. Each item on the scale is associated with a choice between two poles, separated by five distinct positions. Other scales dedicated to opinion leadership exist, such as the one developed by Fred Reynolds and William Darden in 1971, which incorporates information seeking. This scale has eight items, five for opinion leadership and three for information seeking, rated on five-point Likert scales. Another scale, developed by Leisa Reinecke Flynn, Ronald Goldsmith and Jacqueline Eastman in 1996, called the OL and OS scale (Opinion leaders and opinion seekers scale), consists of 6 items for opinion leadership and 6 items for opinion seeking, measured on seven-point scales.

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