Many experiments have obtained a generation effect (GE) with various kinds of laboratory items. Six of the present seven experiments failed to find a GE when the responses were answers to general information questions that had been learned by college undergraduates who had either read or generated the answers during learning several days before the retention test. A GE also did not occur when those same answers were used as responses in paired-associate learning and were tested 20 min after learning. The GE appeared only when subjects learned lists of answers in the absence of the question context, followed by recognition testing. Implications ofthese findings are drawn both for the generality of the GE, especially to the kind of items and naturalistic situations in which learning occurs outside the laboratory, and for the theoretical mechanisms that may underlie the GE in traditional laboratory situations.Although some previous research has not found any difference in eventual recall after learning had occurred through reading as opposed to generatingthe to-be-acquired responses(e.g., when the responsesare nonsense syllables), the typical finding that has been of much current interest and that is called the "generation effect" (GE) is the following: Eventual recall is better after people learn items by generatingthe responses themselves than after they learn the itemsby reading the responsesas experimenter-provided words. However, as McDaniel, Riegler, and Waddill (1990) recently pointed out, "If the generation effect were restricted to one very particular paradigm, then its potential application (e.g., in educational situations) and illumination of learning and memory processes in general would be of questionable value" (p. 796).In accord with this point by McDaniel et al. (1990), we describe below our recurring failure to obtain a GE on items and procedures that we had hoped would produce one. On the assumption that the GE would generalize to everyday materials such as general information items (e.g., "What is the capital of Finland?" Answer = Helsinki) that students learn in naturalistic situations, we compared conditions in which people learned those items by generating as opposed to reading the answers. Our initial goal was to determine how the GE affected various aspects of metamemory such as the feeling of knowing and judgments of learning (note-because a precondition for such an investigation was that a GE should occurand this precondition was never fulfilled in any of our cued-recall experiments-we do not mention further any of the metamemory aspects). Because all but one of our attempts failed to produce a generation effect, these findings confirm the possibility of the limited boundary conditions mentioned by McDapiel et al. In our experiments, the GE did not occur for the ordinary factual items and postacquisition retention intervals that are a part of everyday learning in naturalistic situations.
EXPERIMENT 1This experiment explored the possibility of a GE for a situation that involved learning unk...