Yaakov: "... 2. A: Inbox notification sent upon closure and email sent after one hour / 3. B: ... one day".

"... Additionally, the system default interval to receive an email notification for unread inbox messages is 3 hours. Since 99% of participants in the experiment received this custom email, there is no way for us to tell if the 3 hour interval email (which sends the standard inbox notifications, without any special formatting relating to post closure) would have been more or less effective."

I think if people are fairly active they may or may not react before one hour, and likely will before one day; whereas people who check in every few days or longer (the majority?) are basically in the same category (receive email (group 2 and 3), or not (group 1)).

My point: For the majority, an hour or a day are too similar an interval (too close together).

You could guess which group they might fall into (assuming a correct email address) by checking how often they visit - so perhaps group 3 would benefit from being sent after 3-5 days.

"... Additionally, the system default interval to receive an email notification for unread inbox messages is 3 hours. Since 99% of participants in the experiment received this custom email, there is no way for us to tell if the 3 hour interval email (which sends the standard inbox notifications, without any special formatting relating to post closure) would have been more or less effective."

and

[...]

2. A: Inbox notification sent upon closure and email sent after one hour
3. B: ″ ″ one day.

I think if people are fairly active they may or may not react before one hour, and likely will before one day; whereas people who check in every few days or longer (the majority?) are basically in the same category (receive email (group 2 and 3), or not (group 1)).

My point: For the majority, an hour or a day are too similar an interval (too close together).

You could guess which group they might fall into (assuming a correct email address) by checking how often they visit - so perhaps group 3 would benefit from being sent after 3-5 days.

Yaakov: "... 2. A: Inbox notification sent upon closure and email sent after one hour / 3. B: ... one day".

I think if people are fairly active they may or may not react before one hour, and likely will before one day; whereas people who check in every few days or longer (the majority?) are basically in the same category (receive email (group 2 and 3), or not (group 1)).

My point: For the majority, an hour or a day are too similar an interval (too close together).

You could guess which group they might fall into (assuming a correct email address) by checking how often they visit - so perhaps group 3 would benefit from being sent after 3-5 days.

Yaakov: "... 2. A: Inbox notification sent upon closure and email sent after one hour / 3. B: ... one day".

"... Additionally, the system default interval to receive an email notification for unread inbox messages is 3 hours. Since 99% of participants in the experiment received this custom email, there is no way for us to tell if the 3 hour interval email (which sends the standard inbox notifications, without any special formatting relating to post closure) would have been more or less effective."

I think if people are fairly active they may or may not react before one hour, and likely will before one day; whereas people who check in every few days or longer (the majority?) are basically in the same category (receive email (group 2 and 3), or not (group 1)).

My point: For the majority, an hour or a day are too similar an interval (too close together).

You could guess which group they might fall into (assuming a correct email address) by checking how often they visit - so perhaps group 3 would benefit from being sent after 3-5 days.