Introspection is a technique which can be used to explore memory. For this study, two questions were posed: (1) do students who better retain previously learned intellectual skills and propositions report a greater number of links between and within Gagne and White's four memory structures (networks of propositions, intellectual skills, images, and episodes)? and (2) what types of of links are reported by students, and what is the relationship with instruction? Seventy-eight high school chemistry students received instruction on Boyle's Law and Charles' Law; Two days (retention I and 6 weeks (retention II) after completion of instruction, the same retention test was administered individually to all students. After answering each question, the student was asked about thoughts and/or pictures which flashed through his or her mind while deciding how to answer. Student responses were taped, transcribed, and coded. From the codings, the number of reported links between and within the four types of memory structure was calculated and compared to performance on the retention test. Students who better retained previously learned propositions and intellectual skills generally reported a greater number of links between and within the four memory structures. (BW)