Can I change the way soldiers gain experience?

[The Reaver of Darkness]

I want to make it so that soldiers gain reactions experience not only by using reaction fire, but also any time they successfully suppress fire from an alien who had the time units to use reaction fire, or something like that. I want my soldiers to gain reactions whether they fight aggressively or defensively.

I am also interested in any other information relating to changing the way soldiers gain experience.

[Meridian]

... but also any time they successfully suppress fire from an alien who had the time units to use reaction fire, or something like that.

I don't understand.

I am also interested in any other information relating to changing the way soldiers gain experience.

Soldiers gain experience when the HIT with anything (no damage necessary) or when they HEAL (with medikit).
You can select from 32 options what should they gain when using a particular item... or if that is not enough, you can use Yankes' scripts to implement your own option.

PS: other sources: pilots shooing down UFO (accuracy, reactions and bravery) and martial training facility (all except bravery and reactions I think).

[The Reaver of Darkness]

I don't understand.

If you run in front of an alien and they have enough time units to make reaction fire, but they fail the reaction check.

Soldiers gain experience when the HIT with anything (no damage necessary) or when they HEAL (with medikit).
You can select from 32 options what should they gain when using a particular item

How do I change these in the ruleset?

[Meridian]

If you run in front of an alien and they have enough time units to make reaction fire, but they fail the reaction check.

That's not possible at the moment.

How do I change these in the ruleset?

The 32 options are here: https://openxcom.org/forum/index.php/topic,4230.0.html
(experienceTrainingMode atttribute on a weapon)

As for scripts I don't know, never tried that.

[The Reaver of Darkness]

That can work. Perhaps I can just merge reactions training with firing accuracy training. After all, whoever would train reactions would probably be getting hits as well.