Having identified an article of interest, they would read parts of it selectively and non-sequentially, jumping back and forth, perhaps reading conclusions then introductions, perhaps scanning figures, and reading those sections more carefully that fit their purpose. If an article did not readily fit with their comprehension schemata, the readers would weigh the cost of working through the difficulty against the potential gain relative to their purposes. If they chose to read through a difficult article or portion, they would occasionally pause at length to work through the implications of what had been read, or read it through several times. They might also look up background material in reference works and textbooks.