A 36-year-old woman with borderline personality disorder has been in weekly psychotherapy for eight months with a strong therapeutic alliance. During a session in which the therapist gently explored a pattern of idealization and devaluation in the patient's relationships, the patient becomes visibly withdrawn, gives monosyllabic answers, avoids eye contact, and states flatly, 'I guess therapy isn't really helping me.' In the following session, she arrives late and says everything is 'fine.' The therapist recognizes this as an alliance rupture and addresses it by saying, 'I noticed a shift last session after we discussed your relationship patterns. I wonder if something I said felt hurtful or critical, and I would like to understand your experience of that moment.' Which type of alliance rupture is occurring, and what does the research literature indicate about the therapeutic significance of rupture-repair processes?