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  4. The effects of font type and spacing of text for online readability and performance

  5. The effects of text spacing on screen reading time and comprehension

  6. The Effect of Text Spacing After the Period on Time for On-Screen Reading Tasks

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  8. 2002-loh-figure5-readingspeedofgrepassagesbysinglespacedanddoublespacedsentences.png

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  13. https://news.ycombinator.com/item?id=22975299

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