Instructions: 1. Answer all questions.   2. Yo…

Instructions: 1. Answer all questions.   2. You must not use a dictionary or any other resources.   3. The marks for each question are shown in brackets – use this as a guide as to how much time to spend on each question.   4. Read each question carefully before you start to answer it.   5. Try to answer every question.   6. Check your answers if you have time at the end.   7. Make use of accents and other special characters as necessary: ¡ ¿ á Á é É í Í ó Ó ú Ú ñ Ñ    

In a study designed to test a new antidepressant, a large gr…

In a study designed to test a new antidepressant, a large group of outpatient psychiatric patients was randomly assigned to one of two groups. One of the groups was given the drug as a pill. The other group was given identical-looking inert pills. All participants were tested in the morning. The level of depression of each subject was measured by three psychologists independently, using the Beck Depression Inventory. Which was the independent variable in this study?