The Claim
Rhesus monkeys exhibit significantly greater avoidance behavior in response to fast overhand throwing motions containing rocks compared to slow, directionally misaligned, or object-free throwing motions, based on differences in kinematic features including arm rotation speed, direction, and projectile presence.
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 are more likely to avoid fast overhand throws with rocks than slow or directionally incorrect throws without objects, based on how the motion moves through space.
See the scientific wording
Rhesus monkeys distinguish between threatening and non-threatening throwing motions based on kinematic features such as arm rotation speed, direction, and the presence of a projectile, showing significantly greater avoidance to fast overhand throws with rocks than to slow, directionally misaligned, or object-free motions.
When a monkey sees an arm move quickly in a straight line toward them while holding a rock, their eyes send signals to the brain that activate fear circuits, causing them to move away immediately.
What the research says
1 studyMonkeys don’t throw rocks, but they still know when a human is about to throw one at them—they pay more attention to fast, accurate throws with rocks than slow or empty arm movements, because they understand those are the dangerous ones.
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.