How and why does immediate environment affect test scores?

My science cl just did an experiment where they were to repeat strings of words under varied conditions, then collect and yze the data. They found that there were some variances with individuals, but overall noise and heat were the most distracting factors lowering performance. You will have to prep for the test by ensuring when you go take the exam that you are rested, fed (but not overfed or too near exam time) and comfortable. Maybe a sleeveless shirt or a Tshirt under a shirt you can remove to make yourself slightly cooler - our experiment also showed that cold helped improve memory as we are more alert than when too warm. When studying at home and taking pre-exams, try to do so with other people in the room or a tv on low sound tuned to a talk or reality show. This will help you focus yourself away from any distractions. Don't let the people at home interrupt you, but by walking through the room, or coughing or fidgeting while sitting with you reading - they will be helping to create distractions that break your train of thought. If you don't have any one at home to help, try taking the exam in a quiet coffee shop or diner or library where there is other movements and noise that you can train yourself to ignore. Convince yourself to focus on just the test. Good luck - you can do it!