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This article sketches a broad picture of meta-analysi s, a technique for quantitatively summarizing research studies. Its overall purpose is to guide researchers and practitioners. working in the instructional media and technology field, in future research design and decis ionmaking for instructional development. The article has five main sections: 1) a general introduction to the other sections describes the place of meta-analysis within the educational technology field; 2) a discussion of the reason for and the nature of integrative revlew as a whole, plus details of some of the objections in principle and in practice to quantitatve synthesis; 3) a description of the process of conducting a meta-analys is along wlth a discussion of major methodological issues; 4) an example of three meta-analys es produced on one instructional t r e a t m e n t (i . e . . m a s t e ry l e a r n i n g ) , a n d a n e x p l a n a ti o n o f di f f e r e n t r e s u l t s o b t ai n e d i n each c a s e : and 5) a table of 26 meta-analyses on studies of instructional variables along with guidance on how to read and interpret them. Resume: Cet article dessine un portrait de la meta-analyse qui est une technique qui resume de facon quantitative des etudes de recherche. La meta-analyse a pour but de conduire les chercheurs et les praticiens, qui travaillent dans le domaine de la technologie et dans les media educatifs, a concevoir des recherches et resoudre des problemes pratiques dans le domaine de la technologie educative. L'article est divise en cinq parties: 1) l’instruction generale des autres parties decrivant la posltlon de la meta-analyse dans le domaine de la technologie educatlve; 2) discussi on sur la nature et l' importance d’une revision integrale; presentation des arguments contre les syntheses quantitatlves; 3) description des etapes de realisation d’une meta-analyse; 4) un exemple de trois meta-analyses (par exemple: un apprentissage de virtuosite et une expl ication des differents resultats obtenus dans chaque cas; et 5) une table de 26 meta-analyses sur les variables d'instruction avec des conseil s sur ses lectures et ses inter-

Integrating Research into Instructional Practice: The Use and Abuse of Meta-Analysis