The first factor, with a peak expression time starting at around 5 am to 6 am, linked with measures of analytical thinking through the high use of nouns, articles and prepositions, which has been related, in other studies, to intelligence, improved class performance and education. This early-morning period also shows increased concern with achievement and power. At the opposite end of the spectrum, the researchers find a more impulsive, social, and emotional mode.
The second factor had a peak expression time starting at 3 am to 4 am, the aggregated twitter content found this time to be correlated with the language of existential concerns but anticorrelated with expression of positive emotions.
Overall, the study discovered strong evidence that our language changes dramatically between night and day, reflecting changes in our concerns and underlying cognitive and emotional processes. These shifts also occur at times associated with major changes in neural activity and hormonal levels, suggesting possible relations with our circadian clock. Furthermore, the study revealed both cognitive and emotional states change in a predictable way during the 24 hours.
Fabon Dzogang, Stafford Lightman, Nello Cristianini
It would certainly make sense that circadian rhythms influence our way of thinking and speaking, as we grow tired towards the end of the day, or hungry at certain times. But it feels a bit strange for the study to find an important peak before 6AM; I mean, who is even awake so early, and tweeting on top of that?!
Leading factors behind the Diurnal Variation Profile of the 73 psychometric categories
The first leading factor (F1) and the second leading factor (F2) are shown separately. The profiles that contribute positively to the factors are plotted in red and displayed in the box above the x-axis (F1+ and F2+). The profiles that contribute negatively are plotted in blue and displayed in the box below the x-axis (F1- and F2-). The label of a profile has size proportional to the magnitude of its loading on the factor. The two leading factors are plotted in their respective scales for comparison (F1F2). The x-axis indicates the hour.
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