One day is ASERA I read a study talking about how students often have misconceptions about heat. One misconception is that metal objects are hotter in the sun than non-metal objects. This is based on the observation that touching a metal object feels hotter.
The reality is that metals are good at transferring heat so the metal object will transfer that heat faster if you touch it, even though the 2 objects are the same temperature.
Veritasium did a great video on this.
So in this study the researchers used a heat sensor to show student that objects are the same temperature.