Thinking aloud performance: Individual consistencies over tasks

Previous research (Gilhooly, 1987) indicated considerable individual consistency in quantity and quality of thinking aloud performance over three 8-puzzle tasks. The present study investigated the consistency of individual thinking aloud performance over two types of tasks. One type was largely spatial (the 8-puzzle) and the other largely verbal (the Poisoned Foods task). Considerable individual consistency in thinking aloud performance was found within each task type and, more importantly, between types of task. Thus, subjects who produced lengthy and complete protocols on the 8-puzzle problems also did so in the Poisoned Foods task. These results are discussed in the context of Ericsson and Simon’s (1984) model of thinking aloud.