a particular way

21:05 Aug 21, 2020 

You really need to ask someone (probably NOT a translator!) with specific training in this field, who will instantly be able to confirm the point I am seeking to make.

21:02 Aug 21, 2020 

Not really! It's MORE than just that... this is about the extent to which the feelings they have are, for example, in proportion to the stimulus — or not.
N'en déplaise à nous collègues natifs, in this emotional / psychological context, it it VITAL to properly convey this nuance of meaning, it can not and must not be "taken as implicit" — treat this as if it were a technical or scientific text (which to some extent it is), or a patent.
However, I'm not at all sure that 'particulière' is what is required here — a bit of a faux ami IMHO. I think the sense required is 'de telle ou telle façon', though of course that would be out of register here.
I think it is important to get away from the EN structure, and place the emphasis on the WAY they feel something, rather than WHY they feel it. I think that would lead to a much more idiomatic rendering in FR....

17:48 Aug 21, 2020 

Votre suggestion est aussi bonne que toutes celles proposées ci-dessous; elle ne répond pas cependant au grief de Tony.

17:44 Aug 21, 2020 

Stricto sensu, Tony a raison! Je ne suis pas sûr par contre que la nuance soit si vitale que Tony le croit.

On pourrait traduire par « ...ils doivent comprendre pourquoi ils éprouvent un tel sentiment (de cette façon; d’une telle façon; d’une façon particulière)* ». Mais ce qui est entre parenthèses est implicite en quelque sorte. De dire « vous devez comprendre pourquoi vous éprouvez un tel sentiment de la façon dont vous le faites » revient plus ou moins à dire « pourquoi vous éprouvez un sentiment donné » non?

De plus, en règle générale, la syntaxe française met plus l’accent sur le « résultat » que sur la description des évènements, contrairement à l’anglais. Le français n’est pas très friand des explications explicite comme l’anglais. Mais cela, c’est un autre débat!

* Ou « ...ils doivent comprendre pourquoi ils ressentent ce qu’ils ressentent de cette façon particulière », construction lourde, s’il en est une!

11:07 Aug 21, 2020 

Thank you all for your contributions. Here is my suggestion:

La raison derrière leurs émotions

11:07 Aug 21, 2020 

Thank you all for your contributions. Here is my suggestion:

La raison derrière leurs émotions

10:47 Aug 21, 2020 

Me thinks not — I've done a lot of work around this stuff, and these nuances of meaning we are able to express in EN are very important, even if they require a clumsy paraphrase in FR...

10:32 Aug 21, 2020 

Methinks you are overthinking

06:40 Aug 21, 2020 

Please do note that this 'in a particualr way' is IMHO vital to the wanted sense here: this is not merely about understanding the reasons why they have the feelings they are having, but also why they feel them in the specific way they do. IOW, a given stimulus may not provoke the same feelings in all people — e.g. being told off might make some people sad or others angry or others again unloved.
People who have suffered past emotional trauma may react in different ways from what might be considered 'normal', and it might be all too easy to dismiss certain of their feelings as being 'silly', if the observer were not sensitive to the reasons behind their specific reaction.