The Claim
Rhesus monkeys exhibit minimal avoidance behavior in response to human throwing motions when no projectile is present or when a soft object is thrown, indicating that their behavioral response is determined by the object's potential to cause harm rather than by the motion alone.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Rhesus monkeys do not react fearfully to human throwing motions unless the object thrown has the potential to cause harm, showing their response depends on the object's properties, not just the motion.
See the scientific wording
Rhesus monkeys show minimal avoidance to human throwing motions without a projectile or with a soft object, indicating they assess the functional threat based on the object’s potential to cause harm, not just the motion itself.
When a monkey sees a human arm move, its brain checks what is in the hand. If the object is heavy or hard, the brain activates threat response pathways. If the object is light or soft, those pathways stay quiet. The brain does not react to the motion alone — it reacts to what the motion might do.
What the research says
1 studyMonkeys don’t just scare when they see someone wave their arm—they notice what’s in the hand. If it’s a rock, they run; if it’s a banana, they don’t care. This study shows they know the difference.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.