Intrusive thoughts and intrusive memories in a nonclinical sample

We investigated the relative frequency and aversiveness of intrusive thoughts and memories by eliciting the five most common of each in a mixed-sex nonclinical sample. Intrusive memories were a common phenomenon, although not as common as intrusive thoughts. When memories were elicited first, memories and thoughts were rated as equally pleasant, but thoughts were related as more unpleasant when they were elicited first. The most intrusive memory was associated more often with sadness and happiness, whereas the most intrusive thought was associated more often with fear.