Before revision:  As predicted, we find that the connotation of the word has a U-shaped effect on pro-sociality . Moreover, we show that the overall pattern of results, the U-shape, but not its details, can be explained using a technique from Computational Linguistics known as Sentiment Analysis .
After revision:  As predicted, we find that the connotation of the word has a U-shaped effect on pro-sociality is affected by the words used to describe the available actions .