A therapist trained in EMDR is treating a 28-year-old woman with PTSD following a sexual assault. After completing history-taking, treatment planning, and preparation phases, the therapist asks the patient to identify a target memory, the associated negative cognition ('I am powerless'), a desired positive cognition ('I have strength'), and to rate her disturbance level using the Subjective Units of Disturbance (SUD) scale. Which EMDR phase is the therapist conducting?