Unit 3: Slideshows

Question 1

Sensation

Answer 1

To represent the world, we must detect physical energy (stimulus) from the environment and convert it into neural signals

Question 2

Perception

Answer 2

When we select, organize, and interpret our sensations

Question 3

Bottom-up Processing

Answer 3

Analysis of the stimulus begins with the sense receptors and works up to the level of the brain and mind

Question 4

Top-down Processing

Answer 4

Information processing guided by high level mental processes as we construct perceptions drawing on our experience and expectations

Question 5

Absolute Threshold

Answer 5

Minimum stimulation needed to detect a particular stimulus 50% of the time

Question 6

Difference Threshold

Answer 6

Minimum difference between two stimuli required for detection 50% of the time, also called just noticeable difference (JND)

Question 7

Weber’s Law

Answer 7

The size of the JND is proportional to the intensity of the stimulus

Question 8

Subliminal Threshold

Answer 8

When stimuli are below one’s absolute threshold for conscious awareness

Question 9

Signal Detection Theory

Answer 9

Our thresholds are not absolute - they change based on experience, expectations, motivation, and level of fatigue

Question 10

Sensory Adaptation

Answer 10

Diminished sensitivity as a consequence of constant stimulation