The goal of this clinical trial is to learn whether the Lexical Association Technique (LAT) can improve well-being in people recently diagnosed with multiple sclerosis (MS), either relapsing-remitting (RRMS) or secondary progressive (SPMS). The main questions it aims to answer are: * Does the LAT increase well-being more than a placebo technique ? * Does this technique help reduce psychological distress and improve quality of life ? Participants will: * Be randomly assigned to either the LAT group or the active control group * Complete short visualization exercises at home using a personal computer * Fill out questionnaires about self-esteem, stress, anxiety, depression, quality of life, and adjustment to illness * Take part in the study over several weeks, with assessments before, after, and 14 days after the intervention Researchers will compare results between the two groups (LAT group vs. Control group) to test the immediate and lasting effects of the LAT.
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Effect of the therapeutic technique on patients' self-esteem assessed by comparing patients score at the RSES between the experimental and active control group after the procedure.
Timeframe: The primary endpoint is defined as the difference in self-esteem scores measured on the day following the completion of the LAT or control procedure (post-test), that is, 14 days (±2 days) after the participant's enrollment in the study.