This survey tests your recognition of temperature differences and extreme temperatures ("Hot & Cold Spots") based only on the colors you can see. Please do not feel under pressure to guess the answers "correctly", as there are no right or wrong guesses. The intention is to find the temperature maps that are best for you to read, especially considering people with Color Vision Deficiency (CVD). If you have some kind of Color Vision Deficiency, please feel invited to state so in the voluntary question. This survey is anonymous, no personal data about you will be asked or collected.