What is the ideal ad length/exposure time? If an ad is too short, it will not reinforce the audience’s memory. However, as the length or exposure time increases, costs surge. The length of a television commercial has a positive effect on the ad’s memorability (Pieters and Bijmolt 1997), where longer ads give viewers more time and opportunities to attend to and process the message, thus leading to better learning (Batra and Ray 1986; Moore, Hausknecht, and Thamodaran 1986). More- over, longer ads facilitate viewer learning by displaying the same information more frequently within a single exposure than shorter ads (Singh and Cole 1993). In the radio media context, Allan (2007) observed that brand recall was signifi- cantly greater from 60-second ads than from 30-second ads. McCoy and colleagues (2008) reported that subjects who were exposed to longer-duration pop-up and banner ads showed increased ad recognition. Within the relatively forced exposure context of in-stream video advertising, longer exposure to an ad’s message is expected to increase brand recognition. Thus, we hypothesize: