Picture Superiority Effect

Studies show that pictures are more easily recalled than word. This is beause vidual imagery offres cues in the form of ideas, patternsn or associations that help with recall. 

Visually framed messages require less expose than verbal ones for long-term memory. 

See the full study here :

Terry L. Childers Michael J. Houston, Conditions for a Picture-Superiority Effect on Consumer Memory, Journal of Consumer Research, Volume 11, Issue 2, September 1984, Pages 643–654,

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