Lecture 6: Pattern Recognition: Top-Down

Question 1

Signal

Answer 1

Target stimulus you are trying to detect

Question 2

Noise

Answer 2

Anything that impacts your ability to detect the signal

Question 2

Sensitivity

Answer 2

• How easy it is to distinguish signal from noise
• High sensitivity means you are able to distinguish between signal and noise, low sensitivity being the opposite

Question 3

Signal Detection Theory

Answer 3

Distinguishing a signal among noise

Question 4

Bias

Answer 4

Your tendency to say yes vs. no, can be influenced by expectations or payoffs

Question 5

Miss

Answer 5

There is a signal but you fail to detect it

Question 6

Hits

Answer 6

There is a signal and you correctly detect it

Question 7

Correct Rejection

Answer 7

There is no signal and you say there was no signal

Question 8

False Alarm

Answer 8

There is no signal but you say that there was a signal

Question 9

Context Effects

Answer 9

When the perception of an object is affected by the context/environment

Question 9

Subjective Contours

Answer 9

Cause the edge detectors in our brain to fire even if they aren’t actually there, comes from environment/context

Question 10

Word Superiority Effect

Answer 10

People recognize letters faster when they appear as part of a word than when they appear by themselves or among random letters

Question 11

Pseudoword Superiority Effect

Answer 11

People recognize letters faster when they are apart of fake words, but only if that word in pronounceable

Question 12

Interactive Activation Model

Answer 12

Made by McClelland and Rumelhart, it says that activation goes between levels (feature detectors, letters recognition, and words) in both directions. Explains the word superiority effect