Based on the opponent's pattern, they've frequently chosen paper in odd-numbered rounds (rounds 3 and 5). Since we're now in round 7 (another odd round), there's a good chance they'll continue this pattern with paper. Additionally, the opponent may be feeling pressure as I'm leading 5-1, which might lead them to change strategy away from their frequently used scissors. Choosing scissors gives me the best chance to counter their likely paper play.