“…These studies all support the positive effect of picture, such as increasing shopping efficiency and effectiveness when consumers are familiar with the product items [ 13 ], enhancing review quality, credibility, usefulness, helpfulness [ 4 , 9 , 10 , 14 , 15 ], increasing trust and product sales [ 8 , [16] , [17] , [18] , [19] ]. A few studies investigate the effect of picture count on consumer response and also support its positive effect, including increasing review usefulness and enjoyment [ 3 , 15 ], and purchase intention [ 20 ]. In addition, a few scattered studies explore the effect of picture type (process-focused vs. outcome-focused) and sentiment on consumer response [ 21 , 22 ].…”