article_snippet.sent: Following the experiment in a magnetic resonance imaging scanner, each participant rated the passages on valence, on a scale of -3 for very negative to +3 for very positive, and arousal, on a scale of 1 for very calming to 5 for very arousing.
article_snippet.sent: Following the experiment, each participant rated the passages on valence - from -3 for very negative to +3 for very positive - and arousal - scaled from 1 for very calming to 5 very arousing.
highlights_snippet.sent: Each was rated on how negative or positive, and how arousing participants were .
  