Sensation Chapter 4 Part 1

Detecting Physical energy from the environment and encoding it as neural signals is known as what?

Sensory analysis that begins at the entry level is called what?

This draws on our experiences and expectations. Guided by a higher level thought process.

When the patient has complete sensation but lacks perception.

• Prosopagnosia
• Night Blindness

• Nerve Deafness

• Brain Dead

The study of the relationship between the physical characteristics of stimuli and our psychological experience

• Absolute Threshold

• Psychophysics

• Signal Detection

• Subliminal Messages

The minimal stimulation needed to detect a stimulus 50% of the time. Can range from light, heat, pressure, smell...

• Signal Detection

• Weber's Law

• Psychophysics

• Absolute Threshold

Detecting a weak stimulus or signal dependent on not only the signal's strength but also our psychological state.

• Just Noticeable Difference

• Subliminal Message

• Signal Detection

• Weber's Law

We need to be able to detect small differences among stimuli.

• Difference Threshold

• Signal Detection

• Absolute Threshold

• Psychophysics

Minimal difference that a person can detect between 2 stimuli 50% of the time.

• Sensory Adaptation

• Just Noticeable Difference

• Weber's Law

• Difference Threshold

Regardless of their magnitude, 2 small stimuli must differ by a constant proportion for their differences to be detected.

• Weber's Law

• Freud's Law

• Skinner's Law

• Pavlov's Law