Chapter 3 - textbook notes

Question 1

Fecher

Answer 1

• combined both differential and absolute thresholds
• proposed equation S = K log R
• linked stimulus and sensation quantitatively
• method of average error, method of constant stimuli, method of limits

Question 2

Gall

Answer 2

• thought certain areas of brain answer for certain things
• founded craniology (later called “phrenology”)
• found business, made lots of money

Question 3

Helmholtz

Answer 3

• speed of nerve impulses in frogs
• nerve impulses not instantaneous
• strengthened use of scientific method

Question 4

Weber

Answer 4

• two-point threshold
• just-noticeable difference
• found the difference was a ratio, meaning it depends on the initial value
• adding more if there is already a lot “means” less, so we perceive it as less
• provided method for measuring relationship between body and mind