Questions: Patients like Henry Molaison, who cannot store new memories, suffer from a form of: retrograde amnesia. retroactive interference. anterograde amnesia. proactive interference.

The answer is anterograde amnesia.

Explanation for each option:

1. Retrograde amnesia: This type of amnesia involves the loss of pre-existing memories, typically those that were formed before the onset of amnesia. Patients with retrograde amnesia have difficulty recalling past events but can often form new memories. This does not apply to Henry Molaison, who could not store new memories.

2. Retroactive interference: This is a phenomenon where new information interferes with the ability to recall older information. It is not a form of amnesia but rather a type of memory interference, so it does not describe Henry Molaison's condition.

3. Anterograde amnesia: This is the correct answer. Anterograde amnesia is the inability to form new memories following the onset of the condition. Henry Molaison, famously known as H.M., suffered from anterograde amnesia after undergoing surgery to treat epilepsy, which resulted in his inability to store new memories.

4. Proactive interference: This occurs when old information interferes with the ability to learn or recall new information. Like retroactive interference, it is a type of memory interference and not a form of amnesia, so it does not describe Henry Molaison's condition.