Complex sentence: The earliest forms of conjoint analysis were what are known as Full Profile studies, in which a small set of attributes (typically 4 to 5) are used to create profiles that are shown to respondents, often on individual cards.
Split into simpler sentences: The earliest forms of conjoint analysis were what are known as Full Profile studies. Here a small set of attributes (typically 4-5) are used to create profiles that are shown to respondents, often on individual cards.