After Rita's tantrum at the dinner table, she runs away and is listening to her parents talk. At the dinner table she was wearing a blouse and jeans. But when she's listening she's wearing a pinafore and a different blouse.
When the parapsychologist is listening to a tape recording, the camera cuts to the cassette player. The reverse button is down-pressed instead of the play button. The recording continues.
When Glenn lifts the book off of the table, he accidentally and unintentionally bumps the metal desk lamp. Lee Grant saves the scene by adjusting the lamp back.