a researcher who is examining the effects of temperature and humidity on the eating behavior of rats uses a factorial experiment comparing three different temperatures (70˚, 80˚, and 90˚) and two humidity conditions (low and high). how many factors are in the experiment?

Two factors are there

Explanation:

When a researcher mixing two or more variable then the researcher wants to see the effect of how each variable affects the behavior of an individual and how all variables work together and affect the behavior of an individual. This process is also called a factorial design. The main aim of the research is to find out the relationship between two or more variables. It eliminates or reduces the outer variable that could affect the results of the study. In real life, we can say that it is rare that variables could be isolate. The behavior in the study could be influenced by a different types of variables that interacting simultaneously.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.