A psychotic person may experience thought insertions, which are defined as:

Thought insertions are a specific phenomenon often associated with psychotic disorders. When an individual experiences thought insertions, they believe that thoughts are being introduced into their mind by an external source, rather than originating from their own cognitive processes. This feeling of having foreign thoughts can lead to significant distress and may contribute to a person's overall experience of paranoia or delusions.

The understanding of thought insertions is important in the context of psychosis because it touches on how profoundly a person's perception of reality can be altered when they are in a state of mental disturbance. The other answer options describe different psychological experiences but do not accurately capture the essence of thought insertions. For example, fear of broadcasting thoughts involves a different type of delusion known as thought broadcasting, while strange speech or distortions of reality do not relate directly to the concept of external thoughts being imposed.