Chantal has frontal lobe damage. She is doing a problem-solving task in which she has to choose the red object out of many choices. She can easily complete this repeatedly, but when the experimenter asks her to choose the blue object on a new trial of the task, she continues to choose the red one, even when the experimenter gives her feedback that she is incorrect. Chantal is displaying:

perseveration

Explanation:

Based on the scenario being described within the question it can be said that Chantal is displaying perseveration. In the context of psychology, this refers to the repetition of a specific response regardless of a certain stimuli. Which in this case the repetition is Chantal continuously choosing the red object regardless of the experimentor's response (stimuli.)

Perseveration

Explanation:

Perseveration is a phenomenon in psychology that describes the tendency of an individual to repeat a response continuous despite the change or the removal of the stimulus that elicited such response.

This condition of intellectual impairment and inability to regulate behavior have been linked to the damage of the frontal lobe of the brain that can be caused by traumatic brain injury, stroke, or dementia.

The damage of Chantal's frontal lobe of her brain most likely is an underlying factor that results in the phenomenon called perseveration, which is being displayed by her.