The full stop treatment, where you use a period to convey irritation over text, is now backed by science as an effective way to say 'screw you'.
Yep, the full stop no longer means the sentence is over. It means you're insincere, abrupt and a horrible texter. Something a lot of people knew anyway.
Text messages that end with a full stop are apparently seen as less sincere, according to a 2016 study.
Further experiments revealed people respond to a single-word text (for example: yeah, nope) differently in the presence or absence of a full stop.
Binghamton University Professor of Psychology Celia Klin explained:
In formal writing, such as what you'd find in a novel or an essay, the period is almost always used grammatically to indicate that a sentence is complete.
With texts, we found that the period can also be used rhetorically to add meaning.
Specifically, when one texter asked a question (e.g., I got a new dog. Wanna come over?), and it was answered with a single word (e.g., yeah), readers understood the response somewhat differently depending if it ended with a period (yeah.) or did not end with a period (yeah).
This was true if the response was positive (yeah, yup), negative (nope, nah) or more ambiguous (maybe, alright).
We concluded that although periods no doubt can serve a grammatical function in texts just as they can with more formal writing -- for example, when a period is at the end of a sentence -- periods can also serve as 'textisms', changing the meaning of the text.
But you can also use punctuation and other 'textisms' to get people on your good side.
Though emoticons, bad spelling and an overuse of exclamation marks may horrify punctuation pedants, they're not a sign that people nowadays have no respect for language.
'Textisms' actually convey meaning in the absence of spoken conversation.