hod"><meta name="description" content="This is an accessor function to the @pretreatments slot in a mediation data
object. It returns the entire set of observed pretreatments, in contrast to
pretreatments() applied to a multimedia object, which only returns the names
of the pretreatment variables."><meta property="og:description" content="This is an accessor function to the @pretreatments slot in a mediation data
object. It returns the entire set of observed pretreatments, in contrast to
pretreatments() app