Conceptual and methodological problems inherent in Aptitude Treatment Interaction (ATI) research, coupled with the impracticality of its application, call into question its use as a design model. For these reasons, ATI should be de-emphasized as an instructional design model and attention should be refocused on the structure of content and the…

Critiques Aptitude-Treatment Interactions (ATI) as a major theoretical foundation for individualized instruction and argues that Content-Treatment Analysis (CTI), which assumes that no one learning treatment is appropriate for all subject content, is more appropriate. It is concluded that CTI should be given a greater role in instructional…