Learning and Individual Differences: A Symposium of the Learning Research and Development Center, University of Pittsburgh

The symposium was held on April 9 and 10, 1965, at the Learning Research and Development Center at the University of Pittsburgh [citation:10][citation:14]. Gagné edited the resulting volume, which was published by Charles E. Merrill in 1967 as part of the Merrill International Psychology Series [citation:15][citation:17]. The purpose was to bring together researchers working on learning processes and those studying individual differences—two areas that had developed largely in isolation from each other. The symposium's premise was that adapting instruction to individual differences requires understanding how specific learning processes vary across learners, not merely measuring global aptitude. The volume's chapters address verbal learning, problem solving, attention, motor learning, and the relation of IQ to learning [citation:3].

The table of contents includes chapters on 'Some implications of previous work on learning and individual differences,' 'How can instruction be adapted to individual differences,' 'Individual differences in verbal learning,' 'Individual differences and problem solving,' 'Individual differences in attention: The orientation reflex,' 'Varieties of individual differences in learning,' 'Individual performance R-R Theory and perception,' 'Individual differences and motor learning,' 'The relation of IQ and learning,' and 'Simulation models and human differences' [citation:3]. The final chapter offers general comments on the conference. Contributors include Robert Glaser, whose chapter on implications of previous work on learning is cited in later literature [citation:18]. The volume represents a snapshot of the state of research on learning and individual differences at a pivotal moment in the development of instructional psychology.

The symposium volume (1967) sits between the first edition of The Conditions of Learning (1965) and the second edition (1970). In the 1965 book, Gagné had already argued that different learning outcomes require different conditions, but the role of individual differences was less developed. The 1967 symposium directly addresses how those conditions interact with learner characteristics—a question Gagné returns to in Principles of Instructional Design (1974). The volume's premise is consistent with Gagné's broader view: 'there are no good or bad learners, only differences in rate, mode, and motivation of learning' [citation:12]. The symposium's contribution is to ground that premise in research on specific learning processes rather than treating individual differences as a general aptitude problem.

The chapter on 'The relation of IQ and learning' addresses a central question: does measured intelligence predict learning, and if so, how? Gagné's position, developed across his work, is that IQ predicts learning rate and the amount of instruction required to reach mastery, but not the ceiling of what can be learned. The symposium's contribution is to examine this relation in the context of specific learning tasks. As Gagné later summarized the finding: 'a student can learn anything, provided he has assimilated the prior knowledge and the instruction is organized' [citation:12]. This view challenges the assumption that low IQ forecloses certain learning outcomes. The chapter examines the empirical evidence for the IQ-learning relationship, including the conditions under which the correlation is strong or weak.

The volume was published in 1967 and reprinted or cited in subsequent work on instructional psychology. It is listed in standard bibliographies of cognitive pedagogy [citation:18]. The book has been held in university libraries including the University of the Philippines, Busitema University, the University of Chicago, and the University of Guyana [citation:1][citation:3][citation:15]. Its significance is primarily historical and foundational: it represents the moment when learning researchers and individual-differences researchers began systematic dialogue, a conversation that would inform the development of aptitude-treatment interaction research and adaptive instruction. Gagné's editorial framing—that differences in rate, mode, and motivation are the relevant variables—remains the operative assumption in contemporary adaptive learning research.

The most persistent misconception treats the volume as a defense of fixed individual differences or a claim that some learners cannot achieve certain outcomes. Gagné's position is the opposite: individual differences matter for how instruction should be designed, not for what students are capable of learning. The volume's premise is that if instruction is properly adapted—providing the necessary prerequisite knowledge and appropriate conditions—most students can succeed. The symposium's contributors examine how differences in verbal learning, problem solving, and attention manifest, with the aim of informing instructional adaptation rather than sorting learners. A second misconception assumes the volume is solely concerned with psychometric differences like IQ; in fact, it examines process-level differences in attention, retention, and motor performance.