SIX SEPARATE STUDIES, ALL CONCERNED WITH GUIDED TRIALS DURING THE LEARNING PROCESS, WERE REPORTED. SPECIFIC ASPECTS COVERED BY THE RESEARCH INCLUDE--(1) GUIDANCE AND SYMBOLIC LEARNING AND (2) GUIDANCE AND SEQUENTIAL LEARNING. VARYING NUMBERS OF COLLEGE UNDERGRADUATES WERE USED AS SUBJECTS IN THE SIX EXPERIMENTAL PROCEDURES. THESE INCLUDED--(1) PROMPTING AND CONFIRMATION IN PAIRED-ASSOCIATE LEARNING, (2) THE EFFECT OF TEST SCHEDULES UPON LEARNING UNDER CONDITIONS OF GUIDANCE, (3) THE INTERACTING EFFECTS OF GUIDANCE AND ANXIETY UPON LEARNING, (4) THEORETICAL IMPLICATIONS OF RESPONSE ANALYSIS IN PAIRED-ASSOCIATE LEARNING, (5) AMOUNT OF TRANSFER AS A FUNCTION OF TYPE OF GUIDANCE IN SOLVING SERIES-COMPLETION PROBLEMS, AND (6) A GENERALIZED PLAN FOR SERIAL LEARNING. CONCLUSIONS DRAWN FROM THE RESULTS WERE APPLIED TO THE DEVELOPMENT OF A THEORY OF SERIAL LEARNING. (WB)