What remained to be seen though, was how the various individuals differed and subsequently, which of these "common knowledge" concepts should be suggested or how they should be phrased when presented. The first scholarly mention of mood repair strategies came from Joseph Forgas and Gorden Bower in 1988.[3] Extensive listing and studying of these techniques started in the mid 1990s. It has primarily focused on the differences in the individuals to whom the mood repair strategies are given and how the strategies prove effective on each type of person.