Magnitude priming is considered to be an effective method of influencing numerical estimations regarding general knowledge. However, in the study it was revealed that in case of estimating numerosity of rapidly displayed objects a contrast effect was found. The results suggest an interaction between spatial processing and attentional processes.
Tomczak, P. (2018). Cross-modal anchoring: magnitude priming based on length leads to contrast effect in numerosity judgment. Polish Psychological Bulletin