Researchers today can use technology such as cat scans and fmri scans to measure brain activity. some researchers ask their research participants to describe elements of their experiences (e. g., sensations, images, feelings) while undergoing the scans. this technique is similar to the methodology of

Introspection, Titchener

Explanation:

Introspection is a process through which a person looking inwards and examines one's thoughts, feelings. It a controlled and well structured and scientific way to express one's feelings thought. It is a self-observation experiment. It was first developed by William Wundt. Wundt gives training to the people and observes to analyze the content of their thoughts.  

Edward Titchener is a wundt student who also utilizes this technique. In some way, he used the wundt technique in a wrong manner. Wundt was interested in showing the conscious experience of a person but Titchener was interested in breaking the mental components of a person. It is a great source of self-knowledge (introspection). Even it provides a piece of knowledge about a person which is not possible in another way.