Addressing methodological limitations, Study One compared parent-child interactions of normal and language-delayed children; Study Two investigated whether mothers adjust the length of their utterances to the child's ability to comprehend or to produce language; Study Three probed interactional variables associated with variations in the…

Educational seduction, in which a charismatic, entertaining instructor obtains favorable student ratings while presenting insufficient lecture content, threatens the validity of student ratings and teaching effectiveness research. To examine the effects of one educational seduction variable, instructor expressiveness, on student achievement…