Reference record

Why do reminder times change?

Reminder times change in Funes because a predictable schedule can become part of the calendar rather than an interruption to it. This is Funes's product rationale. The research cited below supports the narrower problem of interruption and attention; it does not test Funes's changing-cycle mechanism. Moving delivery across suitable times and days can reduce automatic dismissal and reach a person in more than one routine context. Timing should change with purpose, not merely for theatrical variety.

Time is part of the reminder

A reminder arriving at 8:00 every morning becomes easy to anticipate. Anticipation can be useful when the routine is working. It can also let a person dismiss the prompt before reading it because the time itself has become the message: morning, same screen, same action, later. A delivery schedule is therefore part of the interaction design, not a neutral carrier.

Iqbal and Horvitz's field study, Notifications and Awareness (CSCW, 2010), examined workplace notification use and preferences. Their field evidence supports examining when an alert arrives and how it interacts with work, rather than evaluating the message in isolation.

Calendar habituation is a learned shortcut

People use recurring appointments, weekdays, and familiar routines to reduce the work of remembering. The same shortcut can classify a reminder before its content is considered. If a task always arrives on Tuesday, a person may associate the task with Tuesday's context rather than with the underlying obligation. A missed Tuesday then becomes a predictable absence.

Mark, Gudith, and Klocke's study of interrupted work (CHI, 2008) describes the cost of switching and resuming attention. It does not recommend a universal cycle or test Funes's schedule. It does show why timing decisions should account for the activity being interrupted and the work required to return to it.

Changing timing needs guardrails

Useful variation stays within boundaries. Quiet hours, time zones, accessibility needs, medication schedules, work commitments, and explicit preferences constrain delivery. A system that ignores those constraints has not become adaptive. It has transferred its scheduling problem to the person receiving the reminder.

Notification research also cautions against treating more alerts as more reliable attention. Pielot, Church, and de Oliveira's MobileHCI study (2014) examined the relationship between mobile alerts and user attention. It does not establish that changing timing improves acknowledgement in Funes. The relevant operational question is whether the next delivery improves acknowledgement without creating a new stream of interruptions.

A cycle can also prevent a reminder from becoming tied to one narrow routine. A task delivered during a commute is received differently from the same task delivered during a quiet planning period. Reviewing acknowledgement by time window helps the service distinguish a poor delivery moment from a reminder that needs a different treatment. Funes changes the schedule only within the limits recorded for the account.

Timing is reviewed after acknowledgement, not before it. The calendar is consulted. The recipient is consulted where possible. The reminder is then placed where it can do its work without pretending that every hour is equally available.

Last updated: 28 May 2026. Related record: what repeated notifications teach the recipient.