Table 1.

The 7-item Adolescent Psychotic-like Symptom Screener (APSS), With the Percentages of Psychotic-Like Experiences Reported by the “Definite” (ie, Interview-Confirmed) Psychotic Experience Group (1) in Self-report Questionnaire Compared With (2) at Interview

Questionnaire Items	Abbreviation	Questionnaire (%)	Interview (%)
1. Some people believe that their thoughts can be read by another person. Have other people ever read your mind?	Mind reading	53	12
2. Have you ever had messages sent just to you through TV or radio?	TV/radio	24	12
3. Have you ever thought that people are following or spying on you?	Spying	47	53
4. Have you ever heard voices or sounds that no one else can hear?	Auditory hallucinations	76	71
5. Have you ever felt you were under the control of some special power?	Controlled	35	6
6. Have you ever seen things that other people could not see?	Visual hallucinations	53	35
7. Have you ever felt like you had extraspecial powers?	Grandiosity	29	29