During this time Curtiss was the only person who had worked with Genie to have any regular contact with her, meeting once a week to continue testing, and she wrote that Genie's speech severely deteriorated due to the abuse she endured.
Curtiss was the only person. This was during this time. This only person had worked with Genie. This was to have any regular contact with her. Any regular contact with her was meeting once a week to continue testing. Genie's speech severely deteriorated due to the abuse. She endured. She wrote this.