Previous work creating systems for collaborative search has mainly focused on solutions for the desktop. However, as the majority of web use moves to mobile phones, few systems have been created on this platform to support collaboration around search results. Mobile search is often a collaborative activity where the input of a group is sought before making a decision to purchase something, visit a venue, or book a ticket. However, currently search and messaging applications are separate, creating frustrating copy-and-paste interactions and uninformative blue links or OpenGraph cards in messages. We built the Search Messenger system to support both finding and sharing search results, in the form of rich, interactive cards, directly within a mobile messaging system. After building the system, we conducted a two-week field study exploring how 14 participants used the system in their daily lives. We report on our findings and implications for future mobile applications that embed functionality in messaging.

The use of applications on mobile devices has changed dramatically over the past few years. While web browsing was once a common activity, it's now reported that 86% of time on mobile phones is in apps other than the browser. We set out to understand how the mobile web was currently fitting into people's lives and what web sessions looked like. Finding a dramatic reduction in mobile web revisi-tation rates compared to previous work and that a large number of sessions comprised single page views, we then studied how web content was shared with others in mobile messaging, the source of many single page sessions. The HCI community has not heavily studied this sharing activity that many people perform daily. We conclude with design implications for new mobile applications from our two studies with a combined 287 participants where we studied actual logs of mobile web use and link sharing behavior.

Reminiscing is a valuable activity throughout the lifespan, helping people establish and maintain their identities and their relationships. Much of this happens in an everyday way, with reminiscing arising naturally out of one's experiences, thoughts, and conversations. In this article we describe work around Pensieve, a tool to support everyday, spontaneous, individual reminiscing through memory triggers—e-mailed reminders that contain snippets from content one has previously created in social media or generic questions that encourage people to reflect on their past. Through a combination of interviews, questionnaires, design activities, and a long-term deployment of Pensieve, we demonstrate the potential value of social media content such as Facebook wall posts and status updates for supporting reminiscence, the utility of systems that support spontaneous reminiscing and writing about the past, the importance of reminders to both reminiscing and lifelogging systems, and insights into people's current pr...

Reminiscing is a valuable activity that people of all ages spontaneously and informally partake in as part of their everyday lives. This paper discusses the design and use of Pensieve, a system that supports everyday reminiscence by emailing memory triggers to people that contain either social media content they previously created on third-party websites or text prompts about common life experiences. We discuss how the literature on reminiscence informed Pensieve's design, then analyze data from 91 users over five months. We find that people value spontaneous reminders to reminisce as well as the ability to write about their reminiscing. Shorter, more general triggers draw more responses, as do triggers containing people's own photos-although responses to photos tended to contain more metadata elements than storytelling elements. We compare these results to data from a second, Pensieve-like system developed for Facebook, and suggest a number of important aspects to consider for both designers and researchers around technology and reminiscence.