Nonprobative photographs (or words) inflate truthiness
Psychonomic Bulletin & Review (2012) - Comment
doi: 10.3758/s13423-012-0292-0  issn: 1069-9384  issn: 1531-5320  pubmed: 22869334 

Eryn J. Newman, Maryanne Garry, Daniel M. Bernstein, Justin Kantner, D. Stephen Lindsay