Abstract
This paper describes two studies designed to explore the effects of reading fill-justified text on reading speed and comprehension. A common contemporary practice is to use the power of microcomputer-based processors to produce printed material that is fill justified(i.e., both left and right margins are straight). Fill justification is frequently accomplished by inserting varying numbers of extra spaces between words. Both studies compared the reading speed of two groups, one that read a fill-justified passage and the other that read the same passage printed with a ragged right margin. Comprehension was investigated in the one study by comparing performance on a test made up of recognition questions; in the other, performance was compared on recall questions. Results indicate significant increase in reading time (that is, slower reading speed) for groups reading fill-justified text. No differences in comprehension were detected.
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