CP 7 preference "send data on every slide".

To add slightly - 'send on every slide' is usually the best option - it allows the LMS to 'keep up' with the current progress, especially for bookmarking...especially if the lesson > LMS communication gets interrupted at any point, the LMS has the 'latest/current' status.

However, the 'send on every slide' has caused problems where there may be a quiz lesson - say 35 questions - and the user is flying through really fast. The lesson/LMS may not be able to keep up, resulting in incomplete data being stored when the user closes the lesson (even if the lesson itself says 'done/passed/xx%', that info may not have made it to the LMS yet).

SO in those types of lessons, 'sending data at end' generall works better.

-E

It can slow down your course playback and places greater load on the LMS, that's all.  If your LMS can handle being deluged with all these separate requests for its attention, then it's not a problem.  However, Captivate usually waits patiently for the LMS to respond after sending data.  If the LMS server is having trouble keeping up, the end user will see this as a delay in the Captivate content responding to their interaction.  It's called "latency" and can vary from a split second to several minutes...depending on the load on your LMS.