Answer:
Observers must be able to describe the qualitative aspects of their experiences is the correct answer.
Explanation:
Introspection has been used by philosophers for knowing about how the ideas were created, but they never set any limits on the tasks they studied. Wundt is considered to be the founding father of modern psychology, he recommended to control the environment where the retrospection is taking place, to limit the range of responses, to train the participants for giving detailed observations. His method inspired other psychologists to use it in more complex mental processes such as emotion, language and learning.
The four rules for Wundts observation are that 1)<em>Observers must know when the procedure will begin, 2)Observers must be in a state of readiness or strained attention, 3)Observation must be repeatable numerous times, 4)Conditions must be varied in terms of control over stimulus manipulation.</em>
<span>The reason and cause of the crusades was a war between Christians and Muslims which centered around the city of Jerusalem and the Holy places of Palestine.</span>
