translate English to French: These organizations have taken part in various investigations into the forms and manifestations of discrimination, which have helped to advance official thinking on how to deal with the problem and which have contributed to the search for more suitable methods.
Ces organisations ont participé à diverses enquêtes sur les formes et manifestations de la discrimination qui ont contribué à l'évolution de la position officielle vis-à-vis du traitement de ce problème et à la recherche de méthodes plus adéquates.