To test some aspects of Skinnerian programed instruction, a 241-frame program on Swedish grammar was presented to students 10 to 12 years old. Skinnerian insistence on student-constructed overt responses and on presenting the "key answer" after each frame were contrasted with covert responses and key answer frequencies less than 100…

A review of the research on correspondence education with emphasis on its two-way communication aspects introduces this report on a series of studies designed to shed light upon problems related to the design and delivery of correspondence instruction. A total of 1,805 adult students enrolled in regular Swedish, Norwegian, and British…