What are the two steps of signal detection?

a. the category of stimulus and the observer's criteria

b. the intensity of stimulus and the observer's criteria

c. the category of stimulus and the conduction velocity

d. the intensity of stimulus and the conduction velocity?

Answer: b. the intensity of stimulus and the observer's criteria

Explanation: signal detection is defined as the analysis of sensory and decision making processes in the detection of faint, uncertain stimuli. The two steps involved in signal detection process are the intensity of stimulus and the observer's criteria. The intensity of stimulus plays a role in influencing the observer's belief that the stimulus occurred while the observers criteria is important in deciding for whether the stimulus occurred.

B. the intensity o stimulus and the observer's criteria.