A new study has attempted to use hard data to pick the scariest horror films of all time.

A website called BroadBandChoices ranked which movies scare us the most by monitoring viewers' average heart rates.

“The ‘Science of Scare’ project followed the heart rates of over 50 people across more than 100 hours of horror films to try and determine the 35 scariest films of all time,” New Musical Express writer Sam Warner reports. “According to the findings, 2012′s Sinister comes out at the top of the table.”

According to Paste Magazine’s Jim Vorel, Sinister recorded the largest average rise in heart rate, from 65 beats per minute (bmp) to 86 bpm.

“Right behind it were several modern James Wan classics, Insidious (85 bpm) and The Conjuring (84 bpm), as well as Ari Aster’s Hereditary (83 bpm) and the original Paranormal Activity (82 bpm),” Vorel adds.

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