Diction
Positive vs. Negative
Source: Drawendo. 2015
The positive and negative dimensions in Docuscope refer to generally positive and negative words in the English lexicon. For example, positive would refer to any word that implies affirmation, creation, acts of love, or compliments. This includes words like "yes," "neat," and "build." The negative category includes words that describe acts of murder, destruction, and sadness. Similar to the distinction between angst and fluff, one should be able to determine where specific character turns and plot points happen based on the trends in negative or positive diction in fan-works.
Source: Drawendo. 2016
Data Analysis
Rose Quartz Positive and Negative Diction in Stories over All Time
Looking across this graph, there should be many changes in diction throughout the various plot points of the series. The most extreme changes in average positivity and average negativity occur when there are very few works in the time period; these are outliers, and the graphs tend to balance out when more works are written. Other than outliers, there are nearly no notable spikes throughout the whole graph. The only interesting event occurs in May 2018 around the time "A Single Pale Rose airs" when there seems to be a spike in negativity at the same time as a notable amount of works published. While this may be a coincidence, it makes since that most stories in this period would primarily incorporate negative diction because of the tragic nature of Rose Quartz's reveal as Pink Diamond's.
Concluding Thoughts
Although positivity and negativity should vary over time, there do not seem to be many patterns about when they change. The diction in the Steven Universe fandom appears to remain relatively constant over time. This could be due to the limitations of DocuScope, the unique science fiction terms in Steven Universe, or the similarities among the colloquial fan-fiction writing style. In fact, I would hypothesize that it is likely because fan-fiction is generally written in a very uniform style, especially within Steven Universe. Because the data returned inconclusive, diction is likely a dead-end when trying to analyze how fan-fiction changes throughout the release of a series.