Study: NCT05431231

Intervention type: DIAGNOSTIC_TEST
Intervention: Outcome Questionnaire-45
Description: a questionnaire that evaluates the patient's level of distress. The questionnaire was developed by Lambert et al. in 1996 and was translated to Hebrew by Gross, Glasser, Elisha et al. in 2015. The questionnaire is composed of 45 statements that describe emotional states, assessing three main components: subjective discomfort, interpersonal relationships and performance of social roles. The participants are asked to rate how often they have felt the states described by each statement using a five-level Likert scale (0 - never, 4 - almost always). This questionnaire has been used extensively and has showed good internal consistence of 0.93 for its English version and 0.91 for its Hebrew version.

Intervention type: DIAGNOSTIC_TEST
Intervention: Outcome Questionnaire-45
Description: a questionnaire that evaluates the patient's level of distress. The questionnaire was developed by Lambert et al. in 1996 and was translated to Hebrew by Gross, Glasser, Elisha et al. in 2015. The questionnaire is composed of 45 statements that describe emotional states, assessing three main components: subjective discomfort, interpersonal relationships and performance of social roles. The participants are asked to rate how often they have felt the states described by each statement using a five-level Likert scale (0 - never, 4 - almost always). This questionnaire has been used extensively and has showed good internal consistence of 0.93 for its English version and 0.91 for its Hebrew version.

Intervention type: DIAGNOSTIC_TEST
Intervention: Outcome Questionnaire-45
Description: a questionnaire that evaluates the patient's level of distress. The questionnaire was developed by Lambert et al. in 1996 and was translated to Hebrew by Gross, Glasser, Elisha et al. in 2015. The questionnaire is composed of 45 statements that describe emotional states, assessing three main components: subjective discomfort, interpersonal relationships and performance of social roles. The participants are asked to rate how often they have felt the states described by each statement using a five-level Likert scale (0 - never, 4 - almost always). This questionnaire has been used extensively and has showed good internal consistence of 0.93 for its English version and 0.91 for its Hebrew version.

Intervention type: DIAGNOSTIC_TEST
Intervention: Hopkins symptoms checklist - short form
Description: a questionnaire for assessing symptomatic distress. The questionnaire was developed by Lutz, Tholen, Schürch, and Berking in 2006. It is a short version of the SCL-90-R, that was developed by Derogatis in 1992. The checklist includes 11 items that describe negative feelings and thoughts. Participants are asked to rate the extent to which a given feeling or thought has troubled them in the past week using a four-level Likert scale (1 - not at all, 4 - very much). This tool is highly correlated with the Global Severity Index (r=.91) and has shown high internal consistency.

Intervention type: DIAGNOSTIC_TEST
Intervention: Hopkins symptoms checklist - short form
Description: a questionnaire for assessing symptomatic distress. The questionnaire was developed by Lutz, Tholen, Schürch, and Berking in 2006. It is a short version of the SCL-90-R, that was developed by Derogatis in 1992. The checklist includes 11 items that describe negative feelings and thoughts. Participants are asked to rate the extent to which a given feeling or thought has troubled them in the past week using a four-level Likert scale (1 - not at all, 4 - very much). This tool is highly correlated with the Global Severity Index (r=.91) and has shown high internal consistency.

Intervention type: DIAGNOSTIC_TEST
Intervention: Hopkins symptoms checklist - short form
Description: a questionnaire for assessing symptomatic distress. The questionnaire was developed by Lutz, Tholen, Schürch, and Berking in 2006. It is a short version of the SCL-90-R, that was developed by Derogatis in 1992. The checklist includes 11 items that describe negative feelings and thoughts. Participants are asked to rate the extent to which a given feeling or thought has troubled them in the past week using a four-level Likert scale (1 - not at all, 4 - very much). This tool is highly correlated with the Global Severity Index (r=.91) and has shown high internal consistency.

Intervention type: DIAGNOSTIC_TEST
Intervention: Prodromal Questionnaire - Brief Version
Description: a patient questionnaire that assesses the existence of a prodromal state or fully developed psychosis. It was developed by Ising et al. in 2012 and was translated to Hebrew by Koren et al. in 2016. The tool is based on a more extensive questionnaire - PQ-92 - that was developed by Loewy et al. in 2005 - and constitutes an attempt to create an improved shorter version. The PQ-16 includes 16 items that refer to thoughts, feelings and experiences that describe various symptoms, including abnormal perception (9 items), unconventional thinking and paranoia (5 items) and negative symptoms (2 items). For each item, first, the participant is asked to indicate whether he had experienced that phenomenon in the past month, and if he had, he is asked to describe the extent to which the phenomenon had caused him distress, using a four-level Likert scale (0 - no distress, 3 - severe distress). Ising et al. found that Kronbach's α was 0.774 for the whole questionnaire.

Intervention type: DIAGNOSTIC_TEST
Intervention: Prodromal Questionnaire - Brief Version
Description: a patient questionnaire that assesses the existence of a prodromal state or fully developed psychosis. It was developed by Ising et al. in 2012 and was translated to Hebrew by Koren et al. in 2016. The tool is based on a more extensive questionnaire - PQ-92 - that was developed by Loewy et al. in 2005 - and constitutes an attempt to create an improved shorter version. The PQ-16 includes 16 items that refer to thoughts, feelings and experiences that describe various symptoms, including abnormal perception (9 items), unconventional thinking and paranoia (5 items) and negative symptoms (2 items). For each item, first, the participant is asked to indicate whether he had experienced that phenomenon in the past month, and if he had, he is asked to describe the extent to which the phenomenon had caused him distress, using a four-level Likert scale (0 - no distress, 3 - severe distress). Ising et al. found that Kronbach's α was 0.774 for the whole questionnaire.

Intervention type: DIAGNOSTIC_TEST
Intervention: Prodromal Questionnaire - Brief Version
Description: a patient questionnaire that assesses the existence of a prodromal state or fully developed psychosis. It was developed by Ising et al. in 2012 and was translated to Hebrew by Koren et al. in 2016. The tool is based on a more extensive questionnaire - PQ-92 - that was developed by Loewy et al. in 2005 - and constitutes an attempt to create an improved shorter version. The PQ-16 includes 16 items that refer to thoughts, feelings and experiences that describe various symptoms, including abnormal perception (9 items), unconventional thinking and paranoia (5 items) and negative symptoms (2 items). For each item, first, the participant is asked to indicate whether he had experienced that phenomenon in the past month, and if he had, he is asked to describe the extent to which the phenomenon had caused him distress, using a four-level Likert scale (0 - no distress, 3 - severe distress). Ising et al. found that Kronbach's α was 0.774 for the whole questionnaire.