For his research methods class project, Hiro is studying the effect of pet ownership on stress levels. Although a lot of research has been done on dog and cat owners, not much is known about other pets, so Hiro decides to study hamster owners. Which of the following would demonstrate a purposive sampling technique?1.His participants are all the people who have purchased hamsters at his local pet store in the past year.2.He asks hamster owners to give him the names of other hamster owners.3.He recruits his hamster owners by e-mailing members of the National Hamster Owners Association and asking for participants.4.He is interested in hamster owners and not pet owners in general.3

Which of the following is an example of the treatment technique for ocd called exposure and response prevention (erp)? a. callie has a hoarding compulsion. she becomes anxious whenever she has to throw something away; she even keeps stuff that she doesn't need and will never use. her therapist has arranged for callie's unnecessary belongings to be discarded of when she is away from home. b. carrie has an obsessive fear of contamination which has led to compulsive hand washing. her therapist is treating her by making her touch dirty laundry but not allowing her to wash her hands following for increasingly longer periods of time. c. kelly has religious obsessions. she feels that if she doesn't read biblical passages every hour of the day, she will do something evil. her therapist is treating her by having her attend religious services more frequently so that good thoughts will replace the bad ones. d. kerry has an obsessive fear of contamination which has led to compulsive hand washing rituals. her therapist is treating her by forcing her to wash her hands repeatedly, even when she doesn't feel anxious.