Double Space After Period

In the skidmore study among people who write with two spaces after periods two spacers there was an increase in reading speed of 3 percent when reading text with two spaces following periods as.
Double space after period. Before computers and word processors were prevalent most people relied on typewriters. However if your instructor or non apa publisher has other requirements e g to use two spaces follow their specifications. Using two spaces after a period comes from the old days of using a physical typewriter. The apa chicago manual of style ap and us government printing office style manual all recommend a single space between sentences.
The story of spaces after periods is often told as though monospaced typewriter fonts needed two spaces after a sentence for good readability and that the wide availability of proportional fonts on computers led to the switch to one space. Spacing after punctuation marks is covered in section 6 1 of the apa publication manual seventh edition. Two spaces were once the norm. Those of a certain age learned how to type using a.
Science has definitively found that two spaces after a period in typed text provides the most efficient reading experience for. Only one space after a period is modern and proper. Once considered an advanced form of technology themselves older typewriters were known to produce uneven or unpredictable line spacing. Use one space after a period or other punctuation mark at the end of a sentence when writing in apa style.
Or an exclamation point. Or a question mark. Unless you are typing on an actual typewriter you no longer have to put two spaces after a period. Very few style guides advise using two spaces after a period.
Double spacing after every period used to be standard.