Psychology Inferential Tests QuestionWatch
A psychologist was interested in testing a new treatment for people with eating disorders. She put up adverts in several London clinics to recruit participants. Thirty people came forward and were all given a structured interview by a trained therapist. The therapist then calculated a excellent, healthy functioning and zero indicates failure to function adequately. The psychologist then randomly allocated half the participants to a treatment group and half to a no treatment group. After eight weeks, each participant was reassessed using a structured interview conducted by the same trained therapist, and given a new numerical score.
The trained therapist did not know which participants had been in either group. For each participant, the psychologist calculate an improvement score by subtracting the score at the start from the score after 8 weeks. The greater the number, the better the improvement.
'(b) Identify an appropriate statistical test for analysing the participants' scores. Explain why it would be a suitable test to use in this study'