Arithmetic computation under audio-visual channel correlated with visual perception, but not auditory perception

The current study aims to investigate the role of visual perception in auditory-presented arithmetic, to determine whether the predictive role of visual form perception—a critical factor in arithmetic computation—is influenced by the perceptual channel.
crtrt=Choice reaction time（RT)
mradjusted = mental rotation
Ravenadjusted = Nonverbal matrix reasoning
figureacc = Rapid figure matching (acc)
figurert = Rapid figure matching (RT)
voiceacc = Rapid tone matching (acc)
voicert = Rapid tone matching (RT)
visariadjusted = visual arithmetic
audariadjusted = auditory arithmetic