What are the three different theories of pattern recognition…

What are the three different theories of pattern recognition? Describe them. Which theory has limitations in explaining pattern recognition?                                                        Or Describe Signal detection theory. Give an example of how it can be used. What is the difference between absolute and differential threshold (Give example)?

Compare and contrast how the speaker in “A Valediction: Forb…

Compare and contrast how the speaker in “A Valediction: Forbidding Mourning” and the speaker in Sonnet 18 explain their love for the women the poems are about. Respond to the provided prompt in at least 50 words. Be sure to include specific references to the poem and cite those references using the line numbers.