`titrebSubjective postures and stable lexical worlds in statistical discourse analysis `/titreb The variety of postures within discursive activity implies variations in lexical occurrences, which have a measurable effect on the discriminating capacity of the statistical method for text analysis ALCESTE (« Analyse des Lexèmes Cooccurrents pour un Ensemble de Segmentations du Texte en Énoncés », or analysis of co-occurrent lexemes for texts segmented into sets of utterances). In 1992, when we first met, Pierre Achard noticed that the three lexical worlds which emerged from the analysis of 220 accounts of nightmares in the study I had communicated to him corresponded to three utterance postures which he had defined in his March 1991 article, « Une approche discursive des questionnaires »(A discursive approach to questionnaires), based on a study conducted during the Algerian war. The article assesses whether we are now in a position to explain this convergence.