A clinical psychologist investigated symptom patterns in patients undergoing an intensive exposure and response prevention (ERP) program for Obsessive-Compulsive Disorder (OCD). For one week, a group of 8 patients recorded their daily hours of structured therapeutic sleep and their daily frequency of intrusive thoughts. The mean scores for each clinical measure were calculated.

Table 1: Daily sleep and intrusive thoughts recorded by OCD patients

Patient	Daily Hours of Structured Therapeutic Sleep	Daily Frequency of Intrusive Thoughts
Patient A	7	45
Patient B	8	2
Patient C	7	82
Patient D	6	11
Patient E	8	54
Patient F	7	95
Patient G	6	0
Patient H	9	31
Mean	7.25	40.0

State how the standard deviation for daily hours of structured therapeutic sleep would differ from the standard deviation for daily frequency of intrusive thoughts.

Table 1: Daily sleep and intrusive thoughts recorded by OCD patients

Patient	Daily Hours of Structured Therapeutic Sleep	Daily Frequency of Intrusive Thoughts
Patient A	7	45
Patient B	8	2
Patient C	7	82
Patient D	6	11
Patient E	8	54
Patient F	7	95
Patient G	6	0
Patient H	9	31
Mean	7.25	40.0

State how the standard deviation for daily hours of structured therapeutic sleep would differ from the standard deviation for daily frequency of intrusive thoughts.

Research methods and skills

Question 17

Table 1: Daily sleep and intrusive thoughts recorded by OCD patients

Markscheme

Research methods and skills

Question 17

Table 1: Daily sleep and intrusive thoughts recorded by OCD patients

Markscheme

Research methods and skills

Question 17

Table 1: Daily sleep and intrusive thoughts recorded by OCD patients

Research methods and skills Questions

Research methods and skills

Question 17

Table 1: Daily sleep and intrusive thoughts recorded by OCD patients

Research methods and skills Questions