Answer: Double blind clinical trial
Explanation:
The situation that is seen here is double blind clinical trail in which neither the participant nor the practitioner knows who is receiving the treatment.
This is used to prevent biasing in the experiment which is caused due to demand characteristics or placebo effect.
Here, in this situation the dog handlers and the experimental observer both were blinded to identify the breath sample.
Magnetic resolution imaging (MRI) and ultrasound.
<span>For most people, dieting is a way to lose weight, so it is often undertaken by those who are overweight or obese and need to reduce their body weight to stay healthy. Therefore, lowering blood pressure and avoiding disease are often second hand results of losing weight by dieting. Dieting rarely results in raised cholesterol. </span>
The answer is:
4. scissors
The correct spelling for the rest is:
1. deficency-deficiency
2. labratoey-laboratory
3.psychiatry-psychiatry
