Final answer:
Video telemetry is the preferred diagnostic tool over EEG between episodes for confirming non-epileptic seizures, as it combines behavioral observation with EEG monitoring.
Step-by-step explanation:
To confirm the diagnosis of non-epileptic seizures, video telemetry is generally the more effective procedure over an EEG between episodes. Video telemetry involves continuous monitoring of both the patient's behavior and brain activity using a video camera and an EEG simultaneously. This allows for the correlation of observed behavior with EEG data, which is particularly useful in distinguishing between epileptic and non-epileptic seizures. An EEG between episodes may not capture the necessary information, as non-epileptic seizures do not typically show the characteristic brain activity seen during epileptic seizures.