L6 - Learning About Time Flashcards
What is periodic timing?
Learning to respond at a particular time
e.g. circadian rhythms
What was Carlsons research with rats?
They would run on the wheel during the dark periods, regardless of time
When it was always dim they would run at the same time on a 25 hour cycle
What did Bolles and Stokes 1965 find about 24-hour clock being innate or experience?
Subjects were born and reared under different light/dark cycles
They learn to anticipate food if on a 24 hour cycle, but not on any other time schedules
What is the superchiasmatic nucleus?
May be evidence for 24 hour clock
The metabolic rate appears to vary as a function of the day night cycle
Lesions of the SCN abolish the circadian regularity
Suggests that every cell in the body has a circadian rhythm controlled by the SCN
What is Weber’s Law?
The just noticeable difference when you change a stimulus is proportional to the initial intensity/magnitude of the changed stimulus
Small amounts judged more accurately than large amounts
You can tell one from two sugars easier than 8-9